引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 792次   下载 329 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Tailoring Oxygen Vacancy on Co3O4 Nanosheets with High Surface Area for Oxygen Evolution Reaction
Gong Zhang,Jing-hong Li*
Author NameAffiliationE-mail
Gong Zhang Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China;Center for Water and Ecology, Tsinghua University, Beijing 100084, China  
Jing-hong Li* Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China jhli@mail.tsinghua.edu.cn 
Abstract:
Electrochemical water splitting requires efficient water oxidation catalysts to accelerate the sluggish kinetics of water oxidation reaction. Here, we designed an efficient Co3O4 electrocatalyst using a pyrolysis strategy for oxygen evolution reaction (OER). Morphological characterization confirmed the ultra-thin structure of nanosheet. Further, the existence of oxygen vacancies was obviously evidenced by the X-ray photoelectron spectroscopy and electron spin resonance spectroscopy. The increased surface area of Co3O4 ensures more exposed sites, whereas generated oxygen vacancies on Co3O4 surface create more active defects. The two scenarios were beneficial for accelerating the OER across the interface between the anode and electrolyte. As expected, the optimized Co3O4 nanosheets can catalyze the OER efficiently with a low overpotential of 310 mV at current density of 10 mA/cm2 and remarkable long-term stability in 1.0 mol/L KOH.
Key words:  Electrocatalyst  OER  Oxygen vacancy  Co3O4
FundProject:This work was supported by the National Natural Science Foundation of China (No.21621003, No.21327806), National Key Research and Development Program of China (No.2016YFA0203101) and Tsinghua University Initiative Scientific Research Program.
调控氧空位实现高比表面积Co3O4纳米片上的产氧反应
张弓,李景虹*
摘要:
关键词:  
DOI:10.1063/1674-0068/31/cjcp1805127
分类号: