过电位
塔菲尔方程
电催化剂
材料科学
分解水
氢
无机化学
钨
电化学
化学
催化作用
电极
物理化学
冶金
光催化
生物化学
有机化学
作者
Licong Peng,Liang Su,Xu Yu,Rongyan Wang,Xiangzhi Cui,Han Tian,Shaowen Cao,Bao Yu Xia,Jianlin Shi
标识
DOI:10.1016/j.apcatb.2022.121229
摘要
Developing efficient electrocatalysts is of significance for hydrogen production in acid electrolyte. In this work, we report a facile decoration of ruthenium species onto tungsten oxides to construct the Mott-Schottky heterojunction electrocatalyst for hydrogen evolution. The resultant Ru-WO2.72 hybrid exhibits a superior Ru-based mass activity of 161.6 times higher than that of commercial Ru/C for hydrogen evolution, featuring a Tafel slope of 50 mV dec−1 and 40 mV overpotential at the current density of 10 mA cm−2. The uniform distribution of Ru species triggers a strong electron transfer across the Ru-WO2.72 Schottky barrier, resulting in a largely increased local electron density on the active Ru surface. Such electron enrichment induced by the Mott-Schottky effect at the metal-metal oxides interface is responsible for enhanced hydrogen production. This work demonstrates an effective strategy by Mott-Schottky effect to regulate electron distribution, which would evoke more inspiration in designing efficient electrocatalysis and beyond.
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