过电位
材料科学
溶解
纳米棒
化学工程
电化学
催化作用
析氧
降级(电信)
电流密度
金属
纳米技术
氧化还原
电极
化学
冶金
计算机科学
物理化学
有机化学
电信
物理
量子力学
工程类
作者
Min Yang,Jingyi Xie,Wen‐Li Yu,Yu‐Ning Cao,Bin Dong,Yanan Zhou,Fuli Wang,Qing-Zong Li,Yulu Zhou,Yong‐Ming Chai
标识
DOI:10.1021/acsami.0c22620
摘要
FeOOH on the real catalytic interface for the oxygen evolution reaction (OER) is chemically unstable to dissolve in alkaline media. Herein, based on the perspective of the dynamically stable interface, we purposely design the well-dispersed nanorod arrays of CoMoO4 as a host on activated iron foam (IF) to realize the optimal redeposition of FeOOH, constructing a self-sacrificial template rich in the FeOOH surface. Notably, at long-time oxidation potential, the precatalyst FeOOH–CoMoO4 can realize MoO42– dissolution and redeposition of Co oxyhydroxides on FeOOH host simultaneously, constructing a dynamically stable Fe(Co)OOH interface. The introduction of CoOOH improves conductivity and provides synergistic effect with FeOOH to lower the energy barrier for OER and maintain long-time stability, eventually exhibiting a low overpotential of 298 mV to reach the current density of 100 mA cm–2 and high stability over 60 h. This work demonstrates the feasibility of manipulating metal dissolution–redeposition process for a dynamically stable interface.
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