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Chemistry

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published: December 06, 2021
doi:
10.3791/62965
, , , , , , , , , ,
1Faculty of Science and Technology,Technological and Higher Education Institute of Hong Kong (THEi), 2Department of Supply Chain and Information Management,The Hang Seng University of Hong Kong, 3Department of Mechanical, Materials and Aerospace Engineering,University of Liverpool, 4Laboratory of Building Environment and New Energy Resources, School of Civil Engineering, Faculty of Infrastructure Engineering,Dalian University of Technology

Summary

Here, we present a protocol to synthesize Co nanoparticles supported on carbon nanotubes with Co- and N- dopants for hydrogen productions.

Abstract

A method for facile synthesis of nanostructured catalysts supported on carbon nanotubes with atomically dispersed cobalt and nitrogen dopant is presented herein. The novel strategy is based on a facile one-pot pyrolysis treatment of cobalt (II) acetylacetonate and nitrogen-rich organic precursors under Ar atmosphere at 800 °C, resulting in the formation of Co- and N- co-doped carbon nanotube with earthworm-like morphology. The obtained catalyst was found to have a high density of defect sites, as confirmed by Raman spectroscopy. Here, cobalt (II) nanoparticles were stabilized on the atomically dispersed cobalt- and nitrogen-doped carbon nanotubes. The catalyst was confirmed to be effective in the catalytic hydrolysis of ammonia borane, in which the turnover frequency was 5.87 mol H2·molCo-1·min-1, and the specific hydrogen generation rate was determined to be 2447 mL H2·gCo-1·min-1. A synergistic function between the Co nanoparticle and the doped carbon nanotubes was proposed for the first time in the catalytic hydrolysis of ammonia borane reaction under a mild condition. The resulting hydrogen production with its high energy density and minimal refueling time could be suitable for future development as energy sources for mobile and stationary applications such as road trucks and forklifts in transport and logistics.

Introduction

Developing low-cost and highly efficient catalysts for renewable energy production remains one of the most critical and challenging problems to relieve the energy crisis. However, it is far from practical applications due to several concerns, such as large-scale production methods with reliable performance, high production cost, and long-standing stability to extend the service life of catalysts. Industry sectors, like transport and logistics, require energy production for vehicles and equipment with long operation hours, high powered energy supply, and minimal refueling time in achieving efficient operations1,2,3. Therefore, effective strategies have been extensively exploited to address the above technical challenges. For example, by regulating the electronic structure of the metal active sites and catalyst supports, designing the specific architecture of the metal nano-catalysts, fine-tuning metal compositions, functional group modification of anchored support, and varying the morphology to increase the number of intrinsic active sites. In the past few decades, nanoparticles (NPs) have dominated the fields of various heterogeneous catalysis, and the catalytic activities can be effectively tuned by varying the size of the NPs. Only until in recent years, highly dispersed single-atom catalysts (SACs) emerged to have excellent properties towards many catalytic reactions due to their unique electronic structure and coordination environment. Particularly, SACs have already demonstrated superior performances in energy conversion such as electrochemical reactions (HER, ORR, OER) and electrochemical energy systems (e.g., supercapacitors, rechargeable batteries)4,5,6. While both NPs and SACs have their respective advantages and limitations in catalytic applications, there do exist reactions that require both NPs and SACs in order to boost catalytic reactivity. For example, Ru NPs supported on Ni- and N-co-doped carbon nanotube superstructure could facilitate the high catalytic wet air oxidation of acetic acid7. This synergistic effect was also demonstrated by Pd1+NPs/TiO2 catalysts for highly selective ketone and aldehydes hydrogenation at room temperatures8. In order to accelerate the field of synergistic NPs and SACs catalysis and explore more on their catalytic applications, a facile way of catalyst synthesis is highly desirable, and the introduction of high loadings of the atomically dispersed active site remains a challenge due to the high tendency of the aggregation of SACs9.

Several methods have been utilized to synthesize SACs for applications in the hydrogenation of nitroarenes10, oxygen reduction reaction and hydrogen evolution reaction11,12, lithium-oxygen batteries13.The most common strategy is the bottom-up approach, in which the metal precursors were absorbed, reduced, and immobilized on the defects of the corresponding support. Mononuclear metal complexes could also be first attached to the functional group of supports, followed by subsequent removal of the organic ligands, thus creating active metal sites for the catalytic process. Atomic layer deposition (ALD) is probably the most frequently used procedure for bottom-up fabrication by depositing a thin layer of film on the substrate with repeated exposure of reactants. Although the catalyst size could be precisely controlled and the reactivity could be greatly improved14, the purity of the substrate was rather demanding, and the metal loading was relatively low, thus resulting in high production costs for practical applications. Various methods such as direct impregnation, co-precipitation, and deposition-precipitation, have been employed to immobilize metal nanoparticles onto the support surfaces, such as metal oxide and nitride, through surface charging effects. However, increasing metal loading usually leads to significant agglomeration and cluster formation of the metal atoms or nanoparticles. Therefore, usually, a very diluted metal solution is required, thus leading to low SACs loadings of the catalysts15. Amine ligands such as phenanthroline have been employed to undergo pyrolysis with metal precursors to prepare atomically dispersed metal catalysts with highly active Co-Nx active sites for the selective dehydrogenation of formic acid. However, the metal loading was relatively low (2-3 wt%) due to the limited number of available N atoms in the amine precursors16.

In the past few decades, hydrogen has been regarded as a potential alternative to replace fossil fuels or hydrocarbons, such as coal, natural gas, and gasoline, due to the advantage of zero-emission of the former. Until now, about 94% of commercial hydrogen is still produced from the reforming process of fossil fuels, in which the process releases a great deal of greenhouse gas17. Therefore, hydrogen production from renewable resources such as water electrolysis is a way to solve the problem of depleted fossil resources and severe carbon emissions. However, the low hydrogen production efficiency has hindered their wider applications. Thus, to overcome this kinetic energy barrier for water-splitting, numerous efficient electrocatalysts have been discovered in the past decade18. Another issue is the storage problem due to the gaseous and explosive nature of hydrogen gas at ambient conditions. Physical storage methods such as compression will require the hydrogen to be compressed up to 700-800 bar, and cryogenic storage by liquefaction will require low temperature at -253 °C19. Although commercialized hydrogen fuel cell-powered vehicles have been successfully demonstrated, the storage problem is yet to be solved if the technology is to be used in wider applications, such as miniature devices and mini-fuel cells. Thus, storage methods of using chemical H materials have been one of the hot focuses in hydrogen energy research. Some examples of chemical H storage materials are ammonia borane (AB)20, formic acid (FA)21, ammonia gas22, sodium alanate23, and magnesium hydride24. Among these, AB has a low molecular weight (30.7 g·mol-1), high gravimetric and volumetric densities (196 gH2·kg-1 and 146 gH2·L-1, respectively). Besides, it is an air and moisture stable compound, non-toxic, and highly soluble in water. Metal nanoparticles on various supported materials have been widely used to release the three equivalents of hydrogen from AB, such as platinum- (Pt-), palladium- (Pd-), ruthenium- (Ru-), cobalt- (Co-), and nickel- (Ni-) based catalysts. Co-based heterogeneous catalysts supported on carbon materials are especially attracting much attention due to their low cost, high abundance, and ease of recovery. Several synthetic strategies have been reported, such as the Co NPs supported on branched polyethylenimine-decorated graphene oxide25. The 3D structure with a large surface area ensures the stabilization of Co NPs maintaining at the 2-3 nm size range and prevented the aggregation of NPs. Another strategy is to use N-doped carbon materials to support Co NPs with small sizes. Using Co(salen)26 and Co-MOF27 (metal organic framework) as the precursors, Co NPs of 9.0 nm and 3.5 nm supported on N-doped porous carbon materials have been prepared respectively. The stability towards AB hydrolysis are high and the reactivity can maintain over 95% of the initial activity after 10 reaction runs. Recently, catalysts with hollow micro/nanostructures have been exploited for AB hydrolysis. These materials are conventionally prepared by hydrothermal methods and have been widely used for lithium-ion batteries, supercapacitors, chemical sensors, and heterogeneous catalysis research. Thus, the copper-cobalt synergy towards AB hydrolysis has been demonstrated by the hollow CuMoO4-CoMoO428, which gives a high TOF of 104.7 min-1. Other highly structural-dependent examples include the core-shell CuO-NiO/Co3O429, the CoxCu1−xCo2O4@CoyCu1−yCo2O4 yolk-shell type30, and the Ni0.4Cu0.6Co2O4 nanoarrays31 were also found to be active towards AB hydrolysis. Another type of emerging materials known as heterostructured catalysts, such as MXenes and layered double hydroxides (LDHs), are increasingly being exploited for electrocatalytic and photocatalytic reaction32,33,34,35. These materials such as the NiFe-layered double hydroxide36,37 and the CoB-N materials having N-doped carbon-cobalt boride heterointerfaces38 are especially active for oxygen evolution and reduction reaction. In principle, they could be further exploited for hydrogen evolution reactions from hydrogen storage materials such as ammonia borane39. Maximizing the interaction between the catalysts and substrates is also another strategy for AB hydrolysis. Chiang et al. have utilized the surface oxide group of graphene oxide to form an initiated complex species with AB40, thus Ni0.8Pt0.2/GO and rGO demonstrated excellent reactivity towards AB hydrolysis. The use of α-MoC as support for Co and Ni bimetallic catalysts assisted the activation of water molecules and achieved high TOF towards AB hydrolysis, which is four times higher than the commercial Pt/C catalyst41.

Taking advantage of high N contents of the dicyandiamide and related C3N4 materials, a protocol for achieving a facile synthesis of cobalt NPs supported on highly dispersed Co- and N-doped carbon nanotubes is presented herein. The gradual in-situ formation of Co NPs from the formed atomically dispersed Co during the pyrolysis of C3N4 materials ensure that 1) Co NPs and Co dopants are highly dispersed; 2) Co NPs can be strongly anchored on the doped carbon supports and 3) Co NPs size can be carefully controlled by the temperature and time of the pyrolysis. The as-prepared Co/Co-N-CNT, as a result of the strongly anchored Co NPs and the ability of the Co dopants to lower the adsorption energy of water molecules, was found to have superior stability towards the hydrolysis of AB for hydrogen production. The details of the synthetic protocol of the catalysts and the measurement of the hydrogen production will be the focal point of this report.

Protocol

CAUTION: Readers are advised to carefully check the properties and toxicities of the chemicals described in this paper for the proper chemical handling from the relevant material safety data sheets (MSDS). Some of the chemicals used are detrimental to health, and special cares are to be taken. The impact of nanomaterials on human health is unknown and could pose safety and health risks. Inhalation and contact through the skin with these materials should be avoided. Safety precautions shall also be exercised, such as rele…

Representative Results

X-ray diffraction patterns (XRD) have been obtained to determine the crystallinity and size of the cobalt NPs. As shown in Figure 1, diffraction peaks corresponding to the (111), (200) and (220) planes (at 2θ of 44.2°, 51.5°, and 75.8° respectively) of the cubic phase of metallic cobalt were present in agreement with the JCPDS (Joint Committee for Powder Diffraction Standards) power diffraction file (card # 15-0806)47. The broad peak at 2θ of …

Discussion

The pyrolysis method has become one of the powerful strategies in the synthesis of one-dimensional nanomaterial on various heteroatom-doped solid supports with controlled sizes of NPs. For example, the nanospace-confined pyrolysis strategy was reported by Guo et al.56. Briefly, the pre-treated MWCNTs, cobalt, and phosphorus precursors were pyrolyzed at 800 °C under N2 atmosphere, and the CoP NPs supported on N-CNT can be obtained. The presence of the micro-pores can act as the…

Disclosures

The authors have nothing to disclose.

Acknowledgements

This work was fully funded by Hong Kong University Grants Committee – Institutional Development Scheme (IDS) Collaborative Research Grant, grant number UGC/IDS(C)14/B(E)01/19, the Faculty Development Scheme (FDS), grant number UGC/FDS25/E08/20 and partially funded by the Institutional Development Scheme (IDS), grant number UGC/IDS(R)25/20.

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Materials

Dicyandiamide Sigma Aldrich D76609
Borane-ammonia complex Aladdin B131882-100g
Citric acid, 99% Sigma Aldrich C0759
Cobalt metal standard solution, traceable to SRM from NIST Co(NO3)2 in HNO3 0.5 mol/l 1000 mg/l Co Certipur Sigma Aldrich 1.19785
Cobalt(II) acetylacetonate, ≥ 99% Sigma Aldrich 727970
Hydrochloric acid, ACS reagent Sigma Aldrich 320331-2.5L
ICP-OES ICP-OES with dichroic spectral combiner (Agilent 5110)
Muffle furnace High Performance Hybrid Muffle furnace, Chamber: (360 x 250 x 320) mm, Exterior: (610 x 545 x 500) mm, Power(3100W), Vulcan 3-1750)
Nitric acid, puriss. p.a., 65.0-67.0% Sigma Aldrich 84378
Sulphuric acid, ACS reagent 95-98% Sigma Aldrich 258105
Tubular furnace OTF-1200X with tube size of 60 mm outer diameter (Hefei Kejing)
Ultrasonic bath 10L Digital Single Frequency 40 kHz Ultrasonic Cleaner (Biobase)
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References

  1. Di Ilio, G., Di Giorgio, P., Tribioli, L., Bella, G., Jannelli, E. Preliminary design of a fuel cell/battery hybrid powertrain for a heavy-duty yard truck for port logistics. Energy Conversion and Management. , 243 (2021).
  2. Imdahl, C., et al. Potentials of hydrogen technologies for sustainable factory systems. 28th CIRP Conference on Life Cycle Engineering. , 583-588 (2021).
  3. Keller, A. V., Karpukhin, K. E., Kolbasov, A. F., Kozlov, V. N. Analysis of hydrogen use as an energy carrier in transport. IOP Conference Series: Materials Science and Engineering. 1159, 012087 (2021).
  4. Sun, B. -. W., Li, H. -. J., Yu, H. -. Y., Qian, D. -. J., Chen, M. In situ synthesis of polymetallic Co-doped g-C3N4 photocatalyst with increased defect sites and superior charge carrier properties. Carbon. 117, 1-11 (2017).
  5. Zhang, Y., et al. Biomass chitosan derived cobalt/nitrogen-doped carbon nanotubes for the electrocatalytic oxygen reduction reaction. Journal of Materials Chemistry A. 6 (14), 5740-5745 (2018).
  6. Sun, J. -. F., et al. Isolated single atoms anchored on N-doped carbon materials as a highly efficient catalyst for electrochemical and organic reactions. ACS Sustainable Chemistry & Engineering. 8 (39), 14630-14656 (2020).
  7. Jin, C., et al. Single-atom nickel confined nanotube superstructure as support for catalytic wet air oxidation of acetic acid. Communications Chemistry. 2 (1), (2019).
  8. Kuai, L., et al. Titania supported synergistic palladium single atoms and nanoparticles for room temperature ketone and aldehydes hydrogenation. Nature Communications. 11 (1), 48 (2020).
  9. Yang, X. -. F., et al. Single-atom catalysts: A new frontier in heterogeneous catalysis. Accounts of Chemical Research. 46 (8), 1740-1748 (2013).
  10. Sun, X., et al. Single cobalt sites in mesoporous N-doped carbon matrix for selective catalytic hydrogenation of nitroarenes. Journal of Catalysis. 357, 20-28 (2018).
  11. Sun, T., et al. Single-atomic cobalt sites embedded in hierarchically ordered porous nitrogen-doped carbon as a superior bifunctional electrocatalyst. Proceedings of the National Academy of Sciences of the United States of America. 115 (50), 12692-12697 (2018).
  12. Wan, G., et al. Engineering single-atom cobalt catalysts toward improved electrocatalysis. Small. 14 (15), 1704319 (2018).
  13. Wang, P., et al. Atomically dispersed cobalt catalyst anchored on nitrogen-doped carbon nanosheets for lithium-oxygen batteries. Nature Communications. 11 (1), 1576 (2020).
  14. Yan, H., et al. Bottom-up precise synthesis of stable platinum dimers on graphene. Nature Communications. 8 (1), 1070 (2017).
  15. Qiao, B., et al. Single-atom catalysis of CO oxidation using Pt1/FeOx. Nature Chemistry. 3 (8), 634-641 (2011).
  16. Tang, C., et al. A stable nanocobalt catalyst with highly dispersed CoNx active sites for the selective dehydrogenation of formic acid. Angewandte Chemie International Edition. 56 (52), 16616-16620 (2017).
  17. Gnanapragasam, N. V., Rosen, M. A. A review of hydrogen production using coal, biomass and other solid fuels. Biofuels. 8 (6), 725-745 (2017).
  18. Wang, S., Lu, A., Zhong, C. J. Hydrogen production from water electrolysis: role of catalysts. Nano Convergence. 8 (1), 4 (2021).
  19. Demirci, U. B. About the technological readiness of the H2 generation by hydrolysis of B(-N)-H compounds. Energy Technology. 6 (3), 470-486 (2018).
  20. Wu, H., et al. Metal-catalyzed hydrolysis of ammonia borane: Mechanism, catalysts, and challenges. International Journal of Hydrogen Energy. 45 (55), 30325-30340 (2020).
  21. Singh, A. K., Singh, S., Kumar, A. Hydrogen energy future with formic acid: a renewable chemical hydrogen storage system. Catalysis Science & Technology. 6 (1), 12-40 (2016).
  22. Grinberg, A., Shter, G. E., Grader, G. S. Nitrogen-based alternative fuels: Progress and future prospects. Energy Technology. 4 (1), 7-18 (2016).
  23. Ley, M. B., Meggouh, M., Moury, R., Peinecke, K., Felderhoff, M. Development of hydrogen storage tank systems based on complex metal hydrides. Materials. 8 (9), 5891-5921 (2015).
  24. Wang, H., Lin, H. J., Cai, W. T., Ouyang, L. Z., Zhu, M. Tuning kinetics and thermodynamics of hydrogen storage in light metal element based systems – A review of recent progress). Journal of Alloys and Compounds. 658, 280-300 (2016).
  25. Li, M., Hu, J., Lu, H. A stable and efficient 3D cobalt-graphene composite catalyst for the hydrolysis of ammonia borane. Catalysis Science & Technology. 6 (19), 7186-7192 (2016).
  26. Wang, H., Zhao, Y., Cheng, F., Tao, Z., Chen, J. Cobalt nanoparticles embedded in porous N-doped carbon as long-life catalysts for hydrolysis of ammonia borane. Catalysis Science & Technology. 6 (10), 3443-3448 (2016).
  27. Zhou, L., et al. Ultrasmall cobalt nanoparticles supported on nitrogen-doped porous carbon nanowires for hydrogen evolution from ammonia borane. Materials Horizons. 4 (2), 268-273 (2017).
  28. Feng, Y., et al. Sea-urchin-like hollow CuMoO4-CoMoO4 hybrid microspheres, a noble-metal-like robust catalyst for the fast hydrogen production from ammonia borane. ACS Applied Energy Materials. 4 (1), 633-642 (2021).
  29. Liao, J., et al. CuO-NiO/Co3O4 hybrid nanoplates as highly active catalyst for ammonia borane hydrolysis. International Journal of Hydrogen Energy. 45 (15), 8168-8176 (2020).
  30. Lu, D., et al. A simple and scalable route to synthesize Cox Cu1-x Co2O4@CoyCu1-yCo2O4 yolk-shell microspheres, a high-performance catalyst to hydrolyze ammonia borane for hydrogen production. Small. 15 (10), 1805460 (2019).
  31. Feng, Y., et al. Durable and high performing Ti supported Ni0.4Cu0.6Co2O4 nanoleaf-like array catalysts for hydrogen production. Renewable Energy. 169, 660-669 (2021).
  32. Prabhu, P., Jose, V., Lee, J. M. Heterostructured catalysts for electrocatalytic and photocatalytic carbon dioxide reduction. Advanced Functional Materials. 30 (24), (2020).
  33. Wang, H., et al. Electronic modulation of non-van der Waals 2D electrocatalysts for efficient energy conversion. Advanced Materials. 33 (26), 2008422 (2021).
  34. Wang, H., Lee, J. -. M. Recent advances in structural engineering of MXene electrocatalysts. Journal of Materials Chemistry A. 8 (21), 10604-10624 (2020).
  35. Prabhu, P., Lee, J. M. Metallenes as functional materials in electrocatalysis. Chemical Society Reviews. 50 (12), 6700-6719 (2021).
  36. Lin, Y., et al. Co-induced electronic optimization of hierarchical NiFe LDH for oxygen evolution. Small. 16 (38), 2002426 (2020).
  37. Li, M., et al. Gd-induced electronic structure engineering of a NiFe-layered double hydroxide for efficient oxygen evolution. Journal of Materials Chemistry A. 9 (5), 2999-3006 (2021).
  38. Jose, V., et al. Highly efficient oxygen reduction reaction activity of N-doped carbon-cobalt boride heterointerfaces. Advanced Energy Materials. 11 (17), (2021).
  39. Qiu, X., et al. Hydrogen generation from ammonia borane hydrolysis catalyzed by ruthenium nanoparticles supported on Co-Ni layered double oxides. Sustainable Energy & Fuels. 5 (8), 2301-2312 (2021).
  40. Prabu, S., Chiang, K. -. Y. Improved catalytic effect and metal nanoparticle stability using graphene oxide surface coating and reduced graphene oxide for hydrogen generation from ammonia-borane dehydrogenation. Materials Advances. 1 (6), 1952-1962 (2020).
  41. Ge, Y., et al. Maximizing the synergistic effect of CoNi catalyst on α-MoC for robust hydrogen production. Journal of the American Chemical Society. 143 (2), 628-633 (2020).
  42. Duan, S., et al. Magnetic Co@g-C3N4 core-shells on rGO sheets for momentum transfer with catalytic activity toward continuous-flow hydrogen generation. Langmuir. 32 (25), 6272-6281 (2016).
  43. Zhang, H., et al. Birdcage-type CoOx-carbon catalyst derived from metal-organic frameworks for enhanced hydrogen generation. ACS Sustainable Chemistry & Engineering. 7 (11), 9782-9792 (2019).
  44. Semiz, L. Dehydrogenation of ammonia borane by dealloyed ruthenium catalysts. Inorganic and Nano-Metal Chemistry. 51 (1), 20-26 (2020).
  45. Bulut, A., et al. Carbon dispersed copper-cobalt alloy nanoparticles: A cost-effective heterogeneous catalyst with exceptional performance in the hydrolytic dehydrogenation of ammonia-borane. Applied Catalysis B: Environmental. 180, 121-129 (2016).
  46. Akbayrak, S., Tonbul, Y., Özkar, S. Ceria supported rhodium nanoparticles: Superb catalytic activity in hydrogen generation from the hydrolysis of ammonia borane. Applied Catalysis B: Environmental. 198, 162-170 (2016).
  47. International Centre for Diffraction Data. Powder diffraction file PDF-2 data base international center for diffraction data JCPDS-ICDD 1999 in JCPDS database. International Centre for Diffraction Data. , (2021).
  48. Zhang, J., Zhao, Z., Xia, Z., Dai, L. A metal-free bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions. Nature Nanotechnology. 10 (5), 444-452 (2015).
  49. Cao, B., et al. Tailoring the d-band center of N-doped carbon nanotube arrays with Co4N nanoparticles and single-atom Co for a superior hydrogen evolution reaction. NPG Asia Materials. 13 (1), (2021).
  50. Varga, T., et al. Co4N/nitrogen-doped graphene: A non-noble metal oxygen reduction electrocatalyst for alkaline fuel cells. Applied Catalysis B: Environmental. 237, 826-834 (2018).
  51. Li, H., Gan, S., Wang, H., Han, D., Niu, L. Intercorrelated superhybrid of AgBr supported on graphitic-C3N4-decorated nitrogen-doped graphene: High engineering photocatalytic activities for water purification and CO2 reduction. Advanced Materials. 27 (43), 6906-6913 (2015).
  52. Zhao, S., et al. One-pot pyrolysis method to fabricate carbon nanotube supported Ni single-atom catalysts with ultrahigh loading. ACS Applied Energy Materials. 1 (10), 5286-5297 (2018).
  53. Dilpazir, S., et al. Cobalt single atoms immobilized N-doped carbon nanotubes for enhanced bifunctional catalysis toward oxygen reduction and oxygen evolution reactions. ACS Applied Energy Materials. 1 (7), 3283-3291 (2018).
  54. Cao, L., et al. Identification of single-atom active sites in carbon-based cobalt catalysts during electrocatalytic hydrogen evolution. Nature Catalysis. 2 (2), 134-141 (2018).
  55. Fu, Z. C., et al. Highly efficient hydrolysis of ammonia borane by anion (-OH, F-, Cl-)-tuned interactions between reactant molecules and CoP nanoparticles. Chemical Communications. 53 (4), 705-708 (2017).
  56. Hou, C. -. C., et al. Tailoring three-dimensional porous cobalt phosphides templated from bimetallic metal-organic frameworks as precious metal-free catalysts towards the dehydrogenation of ammonia-borane. Journal of Materials Chemistry A. 7 (14), 8277-8283 (2019).
  57. Peng, C. Y., et al. Nanostructured Ni2P as a robust catalyst for the hydrolytic dehydrogenation of ammonia-borane. Angewandte Chemie International Edition English. 54 (52), 15725-15729 (2015).
  58. Xu, Q., Chandra, M. Catalytic activities of non-noble metals for hydrogen generation from aqueous ammonia-borane at room temperature. Journal of Power Sources. 163 (1), 364-370 (2006).
  59. Kalidindi, S. B., Sanyal, U., Jagirdar, B. R. Nanostructured Cu and Cu@Cu2O core shell catalysts for hydrogen generation from ammonia-borane. Physical Chemistry – Chemical Physics. 10, 5870-5874 (2008).
  60. Ning, X., Yu, H., Peng, F., Wang, H. Pt nanoparticles interacting with graphitic nitrogen of N-doped carbon nanotubes: Effect of electronic properties on activity for aerobic oxidation of glycerol and electro-oxidation of CO. Journal of Catalysis. 325, 136-144 (2015).
  61. Li, Z., et al. Covalent triazine framework supported non-noble metal nanoparticles with superior activity for catalytic hydrolysis of ammonia borane: from mechanistic study to catalyst design. Chemical Science. 8 (1), 781-788 (2017).

Tags

Metal NanoparticlesCarbon NanotubeCo And N DopingHydrogen ProductionRenewable EnergyCatalyst SynthesisMelemCobalt AcetylacetateCitric AcidPyrolysisArgon Flow
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Poon, P., Lee, K., Wang, Y., Lam, W. W. Y., Leung, P. S., Lu, X., Li, W., Mehdi, B. L., Lu, Y., Tsang, C., Wong, E. Y. C. Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production. J. Vis. Exp. (178), e62965, doi:10.3791/62965 (2021).
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