Chang Jiuli, Chen Liming, Zang Shiqi, Wang Yifan, Wu Dapeng, Xu Fang, Jiang Kai, Gao Zhiyong
School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China.
Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environment Pollution Control, International Joint Laboratory on Key Techniques in Water Treatment, Henan Province, School of Environment, Henan Normal University, Xinxiang, Henan 453007, PR China.
J Colloid Interface Sci. 2020 Jun 1;569:50-56. doi: 10.1016/j.jcis.2020.02.069. Epub 2020 Feb 17.
A facile and efficient oxygen evolution reaction (OER) catalytic system was constructed based on interconnected Ni(OH) nanosheets arrays electrode and Fe(III) containing alkali electrolyte. The partial deposition of Fe(III) onto Ni(OH) with heterostructure obviously enhanced the OER current density and reduced the overpotential, and the Fe(III) cations in electrolyte also furnished positive contribution to the catalytic reaction, the synergy between Ni(OH) electrode and Fe(III) cations in electrolyte therefore substantially improved the OER catalytic efficiency with low overpotential (285 mV at current density of 50 mA cm) and obviously enhanced current density (391 mA cm at 1.8 V). The current work expands our understanding on the effect of Fe(III) cations in electrolyte to OER efficiency of Ni based catalyst, and opens up a cost-effective and practical avenue to enhance the OER catalytic efficiency by introducing metal cations in alkali electrolyte.
基于相互连接的氢氧化镍纳米片阵列电极和含铁（III）的碱性电解质，构建了一种简便高效的析氧反应（OER）催化体系。铁（III）在氢氧化镍上的部分沉积形成异质结构，显著提高了析氧反应电流密度并降低了过电位，电解质中的铁（III）阳离子也对催化反应有积极贡献，因此氢氧化镍电极与电解质中铁（III）阳离子之间的协同作用大幅提高了析氧反应催化效率，过电位较低（电流密度为50 mA cm时为285 mV）且电流密度明显提高（1.8 V时为391 mA cm）。当前工作拓展了我们对电解质中铁（III）阳离子对镍基催化剂析氧效率影响的认识，并开辟了一条通过在碱性电解质中引入金属阳离子来提高析氧反应催化效率的经济实用途径。
