期刊
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
卷 342, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2023.123451
关键词
Hydrogen evolution reaction; Oxide-nitride heterostructure; Atomic configuration tailoring; Ampere-level current density hydrogen; production; in situ phase separation
In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
Mo-based electrocatalysts have garnered significant attention for their promising hydrogen evolution reaction (HER) efficiency, however, the strong adsorption of hydrogen poses a challenge to speedy gaseous hydrogen release. In this respect, regulating the coordination of Mo atoms is an efficient strategy to optimize the electronic configuration and accelerate the HER kinetics. Herein, MoO2/Mo2N heterostructures are prepared by a programmed in situ nitridation process. The precisely controlled Mo-N/Mo-O configuration in MoO2/Mo2N heterostructure weakens hydrogen adsorption on the Mo sites leading to HER with an ampere-level current density. The electrocatalyst delivers 1 A cm-2 at an overpotential of 335 mV in 0.5 M H2SO4. Furthermore, the electrocatalyst has excellent stability by maintaining a current density of 1 A cm-2 for 180 hours with a remarkable Faradaic efficiency of 99.8%. The results reveal a novel strategy to precisely modulate the electronic configurations of low-cost transition metal-based electrocatalysts boding well for industrial-scale hydrogen production.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据