塔菲尔方程
电催化剂
过电位
异质结
析氧
材料科学
催化作用
密度泛函理论
电解
分解水
电解水
金属有机骨架
化学工程
过渡金属
金属
纳米技术
化学
物理化学
计算化学
光电子学
电极
电化学
光催化
冶金
有机化学
吸附
工程类
电解质
作者
Jiale Yang,Haicheng Xuan,Jiangtao Yang,L. Meng,Jie Wang,Xiaohong Liang,Yuping Li,Peide Han
标识
DOI:10.1016/j.apsusc.2021.152016
摘要
Developing effective and low-cost catalysts toward oxygen evolution reaction (OER) is pivotal for hydrogen generation by water electrolysis. The preparation of transition metal based catalysts using the unique structure of metal–organic frameworks is considered a feasible approach. Herein, we have designed and synthesized a heterostructure electrocatalyst composed of FeS2 and MOF-derived CoNiSe2. The catalyst exhibits an extraordinary OER activity with a low overpotential of 230 mV to deliver the current density of 10 mA cm−2, a slight Tafel slope of 54 mV dec−1 in 1 M KOH, and robust durability up to 45 h. The result of density functional theory (DFT) calculations reveals that electronic coupling at the heterogeneous interface helps reduce reaction energy barriers and increase electrical conductivity. This work would provide some inspiration for explorations of advanced electrocatalysts with MOF-derived heterostructure.
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