Tensile straining of iridium sites in manganese oxides for proton-exchange membrane water electrolysers
Hunan Normal University · University of Science and Technology of China · +3 more institutions
Abstract
Abstract Although the acidic oxygen evolution reaction (OER) plays a crucial role in proton-exchange membrane water electrolysis (PEMWE) devices, challenges remain owing to the lack of efficient and acid-stable electrocatalysts. Herein, we present a low-iridium electrocatalyst in which tensile-strained iridium atoms are localized at manganese-oxide surface cation sites (TS-Ir/MnO 2 ) for high and sustainable OER activity. In situ synchrotron characterizations reveal that the TS-Ir/MnO 2 can trigger a continuous localized lattice oxygen-mediated (L-LOM) mechanism. In particular, the L-LOM process could substantially boost the adsorption and transformation of H 2 O molecules over the oxygen vacancies around the…
Citation impact
- FWCI
- 16.78
- Percentile
- 100%
- References
- 48
Authors
9- HSHui SuCorresponding
Hunan Normal University
- CYChenyu Yang
University of Science and Technology of China, National Synchrotron Radiation Laboratory
- MLMeihuan Liu
Central South University
- XZXu Zhang
Beijing University of Technology
- WZWanlin Zhou
University of Science and Technology of China, National Synchrotron Radiation Laboratory
Topics & keywords
- Iridium
- Electrocatalyst
- Manganese
- Oxygen evolution
- Catalysis
- Materials science
- Oxide
- Oxygen