双金属片
双功能
电催化剂
塔菲尔方程
分解水
过电位
钴
析氧
电解
氧化物
材料科学
无机化学
化学
纳米技术
电解质
化学工程
催化作用
金属
电极
冶金
电化学
工程类
生物化学
物理化学
光催化
作者
Peng Zhou,Ziting Li,Yuxin Zhao,Bingxin Zhao,Wenyue Jiang,Xiaoshuang Chen,Jinping Wang,Rui Yang,Chunling Zuo
标识
DOI:10.1016/j.jcis.2024.07.023
摘要
Electrocatalytic water splitting produces green and pollution-free hydrogen as a clean energy carrier, which can effectively alleviate energy crisis. In this paper, bimetallic and selenium doped cobalt molybdate (Se-CoMoO4) nanosheets with rough surface are resoundingly prepared. The multihole Se-CoMoO4 nanosheets display ultrathin and rectangular architecture with the dimensions of ∼ 3.5 μm and 700 nm for length and width, respectively. The Se-CoMoO4 electrocatalyst shows remarkable water electrolysis activity and stability. The overpotentials of oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are 270 and 63.3 mV at 10 mA cm−2, along with low Tafel slopes of 51.6 and 62.0 mV dec-1. Furthermore, the Se-CoMoO4 couple electrolyzer merely requires a cell voltage of 1.48 V to achieve 10 mA cm−2 current density and presents no apparent attenuation for 30 h. This investigation declares that the hybridization of transition bimetallic oxide with nonmetallic adulteration can afford a tactic for the preparation of bifunctional non-precious metal-based electrocatalysts.
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