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Issue 10, 2019
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The role of oxygen vacancies in water oxidation for perovskite cobalt oxide electrocatalysts: are more better?

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Abstract

We explore the role of oxygen vacancies in the oxygen evolution reaction (OER) for double perovskite PrBaCo2O6−δ. Interestingly, we find that largely increasing oxygen vacancies leads to a significant reduction in the intrinsic OER activity. Structural studies reveal that oxygen vacancies tend to orderly align in PrO1−δ. This ordered structure not only lowers the cobalt oxidation states but also triggers a spin-state transition from high-spin to low-spin states for cobalt ions, both greatly slowing the OER kinetics.

Graphical abstract: The role of oxygen vacancies in water oxidation for perovskite cobalt oxide electrocatalysts: are more better?

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Publication details

The article was received on 05 Nov 2018, accepted on 04 Jan 2019 and first published on 04 Jan 2019


Article type: Communication
DOI: 10.1039/C8CC08817A
Chem. Commun., 2019,55, 1442-1445

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    The role of oxygen vacancies in water oxidation for perovskite cobalt oxide electrocatalysts: are more better?

    X. Miao, L. Wu, Y. Lin, X. Yuan, J. Zhao, W. Yan, S. Zhou and L. Shi, Chem. Commun., 2019, 55, 1442
    DOI: 10.1039/C8CC08817A

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