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Dynamic stability of active sites in hydr(oxy)oxides for the oxygen evolution reaction

Authorized Users Only
2020
Authors
Chung, Dong Young
Lopes, Pietro Papa
Farinazzo Bergamo Dias Martins, Pedro
He, Haiying
Kawaguchi, Tomoya
Zapol, Peter
You, Hoydoo
Tripković, Dušan
Strmcnik, Dusan
Zhu, Yisi
Seifert, Soenke
Lee, Sungsik
Stamenković, Vojislav
Marković, Nenad M.
Article (Published version)
,
Springer Nature
Metadata
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Abstract
The poor activity and stability of electrode materials for the oxygen evolution reaction are the main bottlenecks in the water-splitting reaction for H2 production. Here, by studying the activity–stability trends for the oxygen evolution reaction on conductive M1OxHy, Fe–M1OxHy and Fe–M1M2OxHy hydr(oxy)oxide clusters (M1 = Ni, Co, Fe; M2 = Mn, Co, Cu), we show that balancing the rates of Fe dissolution and redeposition over a MOxHy host establishes dynamically stable Fe active sites. Together with tuning the Fe content of the electrolyte, the strong interaction of Fe with the MOxHy host is the key to controlling the average number of Fe active sites present at the solid/liquid interface. We suggest that the Fe–M adsorption energy can therefore serve as a reaction descriptor that unifies oxygen evolution reaction catalysis on 3d transition-metal hydr(oxy)oxides in alkaline media. Thus, the introduction of dynamically stable active sites extends the design rules for creating active and s...table interfaces.

Keywords:
Electrocatalysis / Hydrogen fuel / Solar fuels
Source:
Nature Energy, 2020, 5, 3, 222-230
Publisher:
  • Springer Science and Business Media LLC
Projects:
  • US Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract no. DE-AC02-06CH11357
Note:
  • The peer-reviewed version: https://cer.ihtm.bg.ac.rs/handle/123456789/3700

DOI: 10.1038/s41560-020-0576-y

ISSN: 2058-7546

WoS: 000520704000014

Scopus: 2-s2.0-85082113724
[ Google Scholar ]
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/3485
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