Ge Ruixiang, Ren Xiang, Ji Xuqiang, Liu Zhiang, Du Gu, Asiri Abdullah M, Sun Xuping, Chen Liang
College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, Zhejiang, P. R. China.
ChemSusChem. 2017 Oct 23;10(20):4004-4008. doi: 10.1002/cssc.201701358. Epub 2017 Sep 13.
Efficient oxygen evolution reaction (OER) catalysts are highly desired to improve the overall efficiency of electrochemical water splitting. We develop a benzoate anion-intercalated layered cobalt hydroxide nanobelt array on nickel foam (benzoate-Co(OH) /NF) through a one-pot hydrothermal process. As a 3 D electrode, benzoate-Co(OH) /NF with an expanded interlayer spacing (14.72 Å) drives a high OER catalytic current density of 50 mA cm at an overpotential of 291 mV, outperforming its carbonate anion-intercalated counterpart with a lower interlayer spacing of 8.81 Å (337 mV overpotential at 50 mA cm ). Moreover, this benzoate-Co(OH) /NF can maintain its catalytic activity for 21 h.
为提高电化学水分解的整体效率，人们迫切需要高效的析氧反应（OER）催化剂。我们通过一锅水热法在泡沫镍上制备了一种苯甲酸根阴离子插层的层状氢氧化钴纳米带阵列（苯甲酸根-Co(OH)/NF）。作为一种三维电极，层间距扩大至14.72 Å的苯甲酸根-Co(OH)/NF在291 mV的过电位下驱动50 mA cm的高OER催化电流密度，优于层间距为8.81 Å的碳酸根阴离子插层对应物（在50 mA cm时过电位为337 mV）。此外，这种苯甲酸根-Co(OH)/NF可以保持其催化活性21小时。
