Introducing oxygen vacancies to tune cobalt oxide by Mn doped for high-effective overall water-splitting

被引：2
|
作者：
Zhang, Lei [1 ]
Wei, Fenghua [1 ]
Liang, H. [1 ]
机构：
[1] Jiaying Univ, Meizhou 514000, Guangdong, Peoples R China
来源：
MATERIALS TODAY COMMUNICATIONS | 2024年 / 40卷
关键词：
HER; OER; Co3O4; Oxygen vacancies; HYDROGEN EVOLUTION; CO3O4; NANOCRYSTALS; MANGANESE OXIDES; EFFICIENT; ELECTROCATALYST; PERFORMANCE; CATALYST; CARBON; BATTERIES; GRAPHENE;
D O I：
10.1016/j.mtcomm.2024.109887
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The design of efficient bifunctional electrocatalysts for overall water splitting is an essential task for the production of hydrogen. Co3O4 has been developed as highly efficient OER electrocatalysts but with almost no activity for HER. The formation of oxygen vacancies in Co3O4 could significantly enhance the OER and HER activity, Mn-doping are relatively infrequent in this field. In this work, Co3O4 is modified by doping Mn to introduced oxygen vacancies for high-efficiency water splitting performance. The Mn doped Co3O4 shows excellent performance towards hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) with a low overpotential at 10 mA.cm(-2) of 157 mV and 265 mV, and an applied potential of 1.54 V at 10 mA.cm(-2) . The excellent electrocatalytic performance is mainly attributed to oxygen vacancies in Co3O4, rational adjustment of the electronic structure of active sites to increase the intrinsic activity of Co3O4. The Mn doped Co3O4 can be a promising bifunctional electrocatalyst for overall water splitting.
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页数：8
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