Effect of nickel phosphide nanoparticles crystallization on hydrogen evolution reaction catalytic performance |
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| Authors: | Ya-qiong CHEN Jin-feng ZHANG Lei WAN Wen-bin HU Lei LIU Cheng ZHONG Yi-da DENG |
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| Affiliation: | 1. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;3. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;4. Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, China |
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| Abstract: | In order to investigate the effect of nickel phosphide nanoparticles' (Ni–P NPs) crystallization on hydrogen evolution reaction (HER) catalytic performance, amorphous Ni–P NPs and crystalline Ni12P5 were synthesized by a simple and low-cost autocatalytic reduction method and heat treatment process. The result of electrochemical tests shows that crystalline Ni12P5 has much higher HER catalytic activity than the amorphous one. X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy revealed that Ni–P bond formed during crystallization, making Ni positively charged and P negatively charged. This charged nature of Ni12P5 is similar to [NiFe] hydrogenase and its analogous, which make the removal of H2 less energy-cost. |
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| Keywords: | hydrogen evolution reaction nickel phosphide nanoparticles catalyst crystallization |
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