Wei Tianran, Meng Ge, Zhou Yinhai, Wang Zhifeng, Liu Qian, Luo Jun, Liu Xijun
Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China.
State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China.
Chem Commun (Camb). 2023 Aug 15;59(66):9992-9995. doi: 10.1039/d3cc02419a.
In this study, we prepared amorphous iron-cobalt oxide through the dealloying of trimetallic FeCoAl, showing excellent performance in both urea oxidation and hydrogen evolution reactions (UOR and HER) in alkaline seawater. The catalyst demonstrated stable UOR and HER activity during long-term operations due to the abundant active sites and oxygen vacancies. The catalyst required applied potentials of 1.52 and -0.185 V to yield 100 mA cm for the UOR and HER, respectively. Moreover, when used as both the cathode and anode, the electrolyzer required a working voltage of 1.68 V to yield 100 mA cm for urea-assisted hydrogen production.
在本研究中，我们通过三金属FeCoAl的脱合金化制备了非晶态铁钴氧化物，其在碱性海水中的尿素氧化反应和析氢反应（UOR和HER）中均表现出优异的性能。由于丰富的活性位点和氧空位，该催化剂在长期运行过程中展现出稳定的UOR和HER活性。该催化剂分别需要1.52 V和 -0.185 V的外加电势才能在UOR和HER中产生100 mA cm的电流密度。此外，当用作阴极和阳极时，该电解槽在尿素辅助制氢过程中需要1.68 V的工作电压才能产生100 mA cm的电流密度。
