双缺陷工程RuO2/D-Co3O4/CC复合材料作为引发酸性介质中氧析出反应的高效电催化剂
Dual-defective-engineered RuO2/D-Co3O4/CC composite as efficient electrocatalysts for triggering oxygen evolution reaction in acidic media
刘玉洁 1袁兆朔 1宋琪 1徐同广 2何刚 1孙海晓 1乔倩 1管学峰 1徐焘 1代小平 1张鑫1
作者信息
- 1. State Key Laboratory of Heavy Oil Processing,College of Chemical Engineering,China University of Petroleum,Beijing 102249,China
- 2. Beijing Third Class Tobacco Supervision Station,Beijing 101121,China
- 折叠
摘要
缺陷工程被认为是提高催化剂性能的有效方法,因为它能使催化剂具有丰富的活性位点和合适的结合能,从而提高催化性能.本文采用简单的电沉积和酸蚀刻方法制备了双缺陷工程RuO2/D-Co3O4/CC(低Ru负载2.42 wt％)复合材料,用于增强酸性介质中的氧析出反应(OER).所制备的RuO2/D-Co3O4/CC催化剂采用物理化学技术进行了深入表征,结果表明催化剂中存在明显的阴离子和阳离子缺陷.实验研究表明具有双重缺陷的优化RuO2/D-Co3O4/CC催化剂暴露了更多的电化学活性位点,有效降低了催化反应对电解质中质子浓度的依赖性,从而触发了高性能的OER.只需要181 mV的过电位就能驱动10 mA cm-2的电流密度,并能在此电流密度下保持连续电解120 h.RuO2/D-Co3O4/CC是一种很有前途的酸性OER电催化剂.
Abstract
Defect engineering is widely acknowledged as an effective strategy for improving catalyst performance by in-creasing the abundance of active sites and optimizing binding energies.Herein,dual-defective-engineered RuO2/D-Co3O4/CC composite was fabricated using a straightforward process involving electrodeposition and acid etching method to im-prove the oxygen evolution reaction(OER)with low Ru loading(2.42 wt％)in acidic media.The RuO2/D-Co3O4/CC catalyst was thoroughly characterized using physicochemical techniques,revealing the presence of both anionic and cationic defects in RuO2/D-Co3O4/CC.Experimental studies demon-strate that the optimized RuO2/D-Co3O4/CC with dual defects enhances the electrochemically exposed active sites and effec-tively reduces the dependence of the catalytic reaction on the concentration of protons in the electrolyte,thereby triggering high-performance OER.A mere 181 mV overpotential is needed to achieve a current density of 10 mA cm-2,and it can sustain uninterrupted continuous electrolysis at this current density for 120 h.This characteristic renders it a highly pro-mising electrocatalyst for acidic OER.
关键词
oxygen evolution reaction/defect engineering/anion defects and cation defectsKey words
oxygen evolution reaction/defect engineering/anion defects and cation defects引用本文复制引用
基金项目
国家重点研发计划(2023YFB4004702)
国家重点研发计划(2022YFB3504103)
国家自然科学基金(22272198)
Shccig-Qinling Program(SMYJY20220296)
出版年
2024
NETL
NSTL
万方数据