Huo Xiaoran, Zuo Xiaojiao, Wang Xin, Xing Bowei, Zhang Nannan
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, P. R. China.
Chem Asian J. 2023 Aug 1;18(15):e202300456. doi: 10.1002/asia.202300456. Epub 2023 Jul 10.
The development of efficient, durable, and affordable electrocatalysts is critical for the advancement of a hydrogen economy, particularly in alkaline media. In this study, we propose CoCrFeNi and CoCrFeNiMo high entropy alloys (HEAs) powders as bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). While there is a performance gap compared to Pt/C, the prepared samples exhibit relatively good electrocatalytic activity with overpotentials of 156.7 mV and 160.5 mV for HER at 10 mA cm in a 1.0 M KOH solution, respectively. Notably, the CoCrFeNiMo catalyst demonstrates significantly higher OER activity than commercial RuO with an overpotential of 390 mV at 50 mA cm , and delivers a cell voltage of 1.86 V at a current density of 10 mA cm for water splitting.
开发高效、耐用且经济实惠的电催化剂对于氢经济的发展至关重要，尤其是在碱性介质中。在本研究中，我们提出将CoCrFeNi和CoCrFeNiMo高熵合金（HEA）粉末作为用于析氢反应（HER）和析氧反应（OER）的双功能电催化剂。虽然与Pt/C相比存在性能差距，但制备的样品在1.0 M KOH溶液中，在10 mA cm时HER的过电位分别为156.7 mV和160.5 mV，表现出相对良好的电催化活性。值得注意的是，CoCrFeNiMo催化剂在50 mA cm时的过电位为390 mV，表现出比商业RuO显著更高的OER活性，并且在10 mA cm的电流密度下进行水分解时提供1.86 V的电池电压。
