Enhanced catalytic performance of CuNi bimetallic nanoparticles for hydrogen evolution from ammonia borane hydrolysis |
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| Affiliation: | 1. School of Sciences, Xi''an Technological University, Xi''an 710021, China;2. Henan Engineering Center of New Energy Battery Materials, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, People''s Republic of China;3. Institute of Environmental and Energy Catalysis, School of Materials Science and Chemical Engineering, Xi''an Technological University, Xi''an 710021, China;4. Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices, School of Materials Science and Chemical Engineering, Xi''an Technological University, Xi''an 710021, China;5. College of Resources and Environmental Engineering, Tianshui Normal University, Tianshui 741001, China |
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| Abstract: | Ammonia borane (AB, NH3BH3) hydrolysis is an effective way to safely generate hydrogen. However, a suitable catalyst is indispensable because the hydrolytic reaction cannot take place kinetically at room temperature. In this work, CuNi alloy nanoparticles are immobilized on porous graphitic carbon nitride (g-C3N4) with a facile adsorption-chemical reduction method. Benefiting from the hierarchical porous structure of the support, the interesting alloy effect of Cu and Ni, as well as the synergistic effect between g-C3N4 and the CuNi alloys, the optimal Cu0·7Ni0.3/g-C3N4 catalyst displays excellent catalytic performance in AB hydrolysis, such as high turnover frequency (2.08 min?1, at 303 K), low apparent activation energy (23.58 kJ mol?1), and satisfactory durability. The results verify that the optimal catalyst has particular potential in hydrogen energy utilization due to the advantages such as the facile preparation procedure, low cost and excellent catalytic behavior. |
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| Keywords: | CuNi alloys Heterogeneous catalyst Hydrogen generation Ammonia borane hydrolysis |
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