Cr dopant mediates hydroxyl spillover on RuO2 for high-efficiency proton exchange membrane electrolysis
Shanghai University of Electric Power · Hefei National Center for Physical Sciences at Nanoscale · +1 more institution
Abstract
Simultaneously improving the activity and stability of catalysts for anodic oxygen evolution reaction (OER) in proton exchange membrane water electrolysis (PEMWE) remains a notable challenge. Here, we report a chromium-doped ruthenium dioxide with oxygen vacancies, termed Cr0.2Ru0.8O2-x, that drives OER with an overpotential of 170 mV at 10 mA cm−2 and operates stably over 2000 h in acidic media. Experimental and theoretical studies show that the synergy of Cr dopant and oxygen vacancy induces an unconventional dopant-mediated hydroxyl spillover mechanism. Such dynamic hydroxyl spillover from Cr dopant to Ru active site changes the rate-determining step from OOH* formation to O2 formation and thus greatly…
Citation impact
- FWCI
- 13.07
- Percentile
- 100%
- References
- 86
Authors
8- YSYu ShenCorresponding
Shanghai University of Electric Power
- XZXiaolong Zhang
Hefei National Center for Physical Sciences at Nanoscale
- MQMing‐Rong Qu
Hefei National Center for Physical Sciences at Nanoscale
- JMJie Ma
Shanghai University of Electric Power
- SZSheng Zhu
Ministry of Public Security of the People's Republic of China, Shanghai University of Electric Power
Topics & keywords
- Dopant
- Spillover effect
- Electrolysis
- Chemistry
- Proton
- Membrane
- Materials science
- Chemical engineering
- Affordable and clean energy