过电位
分解水
催化作用
电化学
化学工程
材料科学
阳极
电解质
制氢
无机化学
化学
电极
物理化学
有机化学
光催化
工程类
作者
Wenyan Zhang,Wei Wang,Yingfei Hu,Hangmin Guan,Xiaoli Yang,Hao Lu
标识
DOI:10.1016/j.ijhydene.2020.12.210
摘要
Electrochemical water splitting is considered as a promising approach to storing renewable electricity in the form of hydrogen fuel. In this work, we report the design and electrocatalytic properties of chiral [email protected] with three dimensional (3D) continuous macroporous framework. With the chiral [email protected] as anode, the OER overpotential required to achieve the current density of 10 mA/cm2 was as low as 110 mV in 0.1 M KOH electrolyte, and the hydrogen production rate of water splitting reaction could reach 1070 nL/s. Moreover, the OER overpotential could be regulated easily by controlling the deposition time of chiral CuO layer on Ni. The high catalytic activity of chiral [email protected] for water splitting is closely associated with the Chiral-induced spin selectivity (CISS) effect, the large reactive area provided by its 3D macroporous structure, and the effective cooperation between chiral CuO and Ni foam that facilitated the transportation of spin aligned electrons from chiral CuO layer to Ni. The results shown in this work indicate a simple and promising strategy to improve the electrocatalytic activity of other chiral earth-abundant catalysts for water splitting.
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