Yang Lin, Xie Lisi, Ren Xiang, Wang Ziqiang, Liu Zhiang, Du Gu, Asiri Abdullah M, Yao Yadong, Sun Xuping
College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China.
Chem Commun (Camb). 2017 Dec 19;54(1):78-81. doi: 10.1039/c7cc07259g.
It is highly attractive to design and develop earth-abundant electrocatalysts toward high-efficiency water oxidation electrocatalysis in alkaline media. In this communication, we report the in situ hydrothermal sulfidization preparation of a hierarchical CuCoS nanoarray on copper foam (CuCoS/CF) from its CuCo-hydroxide nanowire array precursor. When used as a 3D catalyst electrode for water oxidation, the as-prepared CuCoS/CF is superior in catalytic activity, demanding overpotentials of only 259 and 295 mV to achieve 60 and 100 mA cm in 1.0 M KOH, respectively. Moreover, it also shows strong electrochemical durability with high turnover frequency values of 0.069 and 0.390 mol O s at overpotentials of 300 and 400 mV, respectively.
设计和开发在碱性介质中用于高效水氧化电催化的地球丰富型电催化剂极具吸引力。在本通讯中，我们报道了从其氢氧化铜钴纳米线阵列前驱体原位水热硫化制备泡沫铜上的分级硫化铜钴纳米阵列（CuCoS/CF）。当用作水氧化的三维催化剂电极时，所制备的CuCoS/CF具有优异的催化活性，在1.0 M KOH中分别仅需259和295 mV的过电位即可达到60和100 mA cm 。此外，它还表现出很强的电化学耐久性，在300和400 mV的过电位下，周转频率值分别为0.069和0.390 mol O s 。
