期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 920, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.165770
关键词
Perovskite; Electrocatalysis; Sol-gel method; OER; ORR
资金
- Natural Science Foundation of Guangxi Province [2019GXNSFGA245006]
- National Natural Science Foundation of China [52161026]
- Specific Research Project of Guangxi for Research Bases and Talents projects [Guike AD21220113]
- Key Lab of New Processing Technology for Nonferrous Metal Materials
- Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources
This study reports the synthesis of Sr0.9M0.1RuO3-delta (SMRO, M=K, Na, Ag) perovskite catalysts via a sol-gel method, which exhibit excellent oxygen evolution and oxygen reduction reaction performance. Metal ion doping introduces oxygen vacancies and lattice oxygen into the structure, which is identified as the main reason for the improved catalytic activity. Among the four samples, Sr0.9Ag0.1RuO3 (SARO) shows the highest activity. This work may offer insights into the design of efficient bifunctional OER/ORR electrocatalysts.
The bifunctional catalysts which can improve both oxygen evolution ( OER) and oxygen reduction reaction (ORR) activity are highly desirable for fuel cells, metal-air batteries and water splitting. Here, we report a perovskite structure Sr0.9M0.1RuO3-delta (SMRO, M=K, Na, Ag) synthesized via sol-gel method performing excellent bifunctional catalytic activity. With the metal ion (M+) doping in A-site, X-ray photoelectron spectroscopy analysis reveals that oxygen vacancy and lattice oxygen are introduced into the structure, which is confirmed as the primary reason for the improvement of catalytic activity. The highest OER and ORR activity among these four samples is observed in Sr0.9Ag0.1RuO3 (SARO). This work may shed light on the designing of high-efficiency bifunctional OER/ORR electrocatalysts. (C) 2022 Elsevier B.V. All rights reserved.
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