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

Dong Young Chung, Pietro P. Lopes, Pedro Farinazzo Bergamo Dias Martins, Haiying He, Tomoya Kawaguchi, Peter Zapol, Hoydoo You, Dusan Tripkovic, Dusan Strmcnik, Yisi Zhu, Soenke Seifert, Sungsik Lee, Vojislav R. Stamenkovic, Nenad M. Markovic

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

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 stable interfaces.

Original languageEnglish
Pages (from-to)222-230
Number of pages9
JournalNature Energy
Volume5
Issue number3
DOIs
Publication statusPublished - 2020 Mar 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology

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