Unraveling Compressive Strain and Oxygen Vacancy Effect of Iridium Oxide for Proton‐Exchange Membrane Water Electrolyzers
Central South University · Hunan Normal University · +3 more institutions
Abstract
Abstract Iridium‐based electrocatalysts are commonly regarded as the sole stable operating acidic oxygen evolution reaction (OER) catalysts in proton‐exchange membrane water electrolysis (PEMWE), but the linear scaling relationship (LSR) of multiple reaction intermediates binding inhibits the enhancement of its activity. Herein, the compressive strain and oxygen vacancy effect exists in iridium dioxide (IrO 2 )‐based catalyst by a doping engineering strategy for efficient acidic OER activity. In situ synchrotron characterizations elucidate that compressive strain can enhance Ir─O covalency and reduce the Ir─Ir bond distance, and oxygen vacancy (O v ) as an electronic regulator causes rapid adsorption of water…
Citation impact
- FWCI
- 15.60
- Percentile
- 100%
- References
- 48
Authors
10- MLMeihuan Liu
Central South University, Hunan Normal University
- XZXiaoyan Zhong
Hunan Normal University
- XCXiaoxia Chen
Hunan Normal University
- DWDonghai WuCorresponding
Huanghe Science and Technology College
- CYChenyu Yang
University of Science and Technology of China, National Synchrotron Radiation Laboratory
Topics & keywords
- Oxygen evolution
- Materials science
- Iridium
- Vacancy defect
- Water splitting
- Catalysis
- Photochemistry
- Inorganic chemistry
- Clean water and sanitation