Cr dopant mediates hydroxyl spillover on RuO2 for high-efficiency proton exchange membrane electrolysis

Yu Shen, Xiao-Long Zhang, Ming-Rong Qu, Jie Ma, Sheng Zhu (), Yu-Lin Min (), Min-Rui Gao () and Shu-Hong Yu ()
Additional contact information
Yu Shen: Shanghai University of Electric Power
Xiao-Long Zhang: New Cornerstone Science Laboratory, Department of Chemistry, University of Science and Technology of China
Ming-Rong Qu: New Cornerstone Science Laboratory, Department of Chemistry, University of Science and Technology of China
Jie Ma: Shanghai University of Electric Power
Sheng Zhu: Shanghai University of Electric Power
Yu-Lin Min: Shanghai University of Electric Power
Min-Rui Gao: New Cornerstone Science Laboratory, Department of Chemistry, University of Science and Technology of China
Shu-Hong Yu: New Cornerstone Science Laboratory, Department of Chemistry, University of Science and Technology of China

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: 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 improves the OER performance. Moreover, the Cr dopant and oxygen vacancy also play a crucial role in stabilizing surface Ru and lattice oxygen in the Ru-O-Cr structural motif. When assembled into the anode of a practical PEMWE device, Cr0.2Ru0.8O2-x enables long-term durability of over 200 h at an ampere-level current density and 60 degrees centigrade.

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-024-51871-z Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51871-z

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-024-51871-z

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().