析氧
材料科学
多金属氧酸盐
纳米棒
过电位
分解水
电解
兴奋剂
杂原子
Crystal(编程语言)
密度泛函理论
电极
塔菲尔方程
电导率
化学工程
过渡金属
催化作用
纳米技术
电化学
光电子学
化学
物理化学
电解质
计算化学
计算机科学
光催化
有机化学
工程类
程序设计语言
生物化学
戒指(化学)
作者
Yao Zhang,Haoran Guo,Junkai Ren,Xinpan Li,Wenlu Ren,Rui Song
标识
DOI:10.1016/j.apcatb.2021.120582
摘要
The Fe-S-NiMoO 4 /MoO 3 @NF electrode with nanorod array structure is prepared and analyzed by systematic experiments and DFT calculations, which exhibits a better OER performance that can yield the quasi-industrial standard. • The doping ratio of Fe can control accurately by using FeMo 6 as the precursor. • Fe-doping can regulate the crystal facets of MoO 3 and accelerate the OER kinetics. • The Fe-S-NiMoO 4 /MoO 3 @NF electrode can meet the requirements for industrial OER. The widespread implementation of water splitting urgently requires low-cost, effective and stable electrocatalysts for the industrial oxygen evolution reaction (OER) that can reach a large current density (>500 mA cm −2 ). Herein, we report a facile solvothermal strategy to fabricate a binder-free electrode of Fe-S-NiMoO 4 /MoO 3 with nanorods array uniformly grown on a nickel-foam (NF). The Anderson-type polyoxometalate (NH 4 ) 3 [FeMo 6 O 24 H 6 ]·7H 2 O as the precursor has enabled an accurate and controllable Fe-doping in transition metal oxides (TMO). The combination of experiments and density functional theory (DFT) calculations reveal that Fe-doping is conductive to regulate the crystal plane of MoO 3 , modulate the electronic structure and improve the conductivity. Consequently, the Fe-S-NiMoO 4 /MoO 3 @NF electrode can yield 500 mA cm −2 at an overpotential of 271 mV and work steadily over 100 h under 50 °C that can meet the requirements of the industrial water electrolysis. This study provides a practical approach to design electrocatalysts for future industrial applications.
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