A Nickel Coated Copper Substrate as a Hydrogen Evolution Catalyst

Catalysts

Srikanth Vuppala¹  Yun-Lun Chueh²  Kuangye Wang²  K. M. M. D. K. Kimbulapitiya³  G. Phaneendra Reddy⁴  Krishna P. Pande⁵  Po-Tsung Lee⁶  Poshan Kumar Reddy Kuppam⁶ 

[1] Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milan, Italy;Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30010, Taiwan;Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan;Department of Physics, Sri Venkateswara Vedic University, Tirupati 517 502, India;International College of Semiconductor Technology, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan;UST-IPP, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan;

关键词: copper;    hydrogen evolution;    nickel;    coating;   

DOI  :  10.3390/catal12010058

来源: DOAJ

【 摘 要 】

Replacing precious metals with low-cost metals is the best solution for large scale production. Copper is known for its excellent conductivity and thermal management applications. When it comes to hydrogen evolution reaction, it is highly unstable, especially in KOH solution. In this paper, we approached a simple method to reduce corrosion and improve the performance by depositing nickel-molybdenum oxide and nickel on copper substrates and the achieved tafel slopes of 115 mV/dec and 117 mV/dec at 10 mA/cm². While at first, molybdenum oxide coated samples showed better performance after 100 cycles of stability tests, the onset potential rapidly changed. Cu-Ni, which was deposited using the electron gun evaporation (e-gun), has shown better performance with 0.28 V at 10 mA/cm² and led to stability after 100 cycles. Our results show that when copper is alloyed with nickel, it acts as a promising hydrogen evolution reaction (HER) catalyst.

【 授权许可】

Unknown