双金属片
材料科学
析氧
掺杂剂
催化作用
吸附
过渡金属
拉曼光谱
兴奋剂
化学工程
X射线光电子能谱
金属
纳米技术
无机化学
电化学
物理化学
有机化学
化学
冶金
电极
工程类
物理
光学
光电子学
作者
Jie Wu,Yuanyuan Zhang,Bin Zhang,Siwei Li,Ping Xu
标识
DOI:10.1021/acsami.2c00455
摘要
Development of low-cost, efficient, and durable electrocatalysts for the oxygen evolution reaction (OER) is crucial for multiple energy conversions and storage devices. Herein, Zn-doped CoS2 nanoarrays supported on carbon cloth, Co(Zn)S2/CC, are fabricated through a facile sulfidization of CoZn metal-organic frameworks. This precatalyst, Co(Zn)S2/CC, with a well-defined nanoarray structure affords excellent OER catalytic activity (η = 248 mV at 10 mA/cm2) and long-term durability in 1 M KOH. X-ray photoelectron and in situ Raman spectroscopic studies indicate that Co(Zn)S2 undergoes surface reconstruction with the generation of Co(Zn)OOH adsorbed with SO42- at the surface during the OER process. The Zn dopant is calculated to impact on the electronic structure of Co species and further the adsorption of intermediates. This work not only provides a novel method for the synthesis of bimetallic sulfides but also gives insights into the doping effect on the OER performance of transition metal sulfides.
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