Facet-Dependent Intrinsic Activity of Single Co_3O_4 Nanoparticles for Oxygen Evolution Reaction

Zhibin Liu; Hatem M. A. Amin; Yuman PengManuel CorvaRossitza PentchevaKristina Tschulik

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Facet-Dependent Intrinsic Activity of Single Co_3O_4 Nanoparticles for Oxygen Evolution Reaction

机译：Facet-Dependent Intrinsic Activity of Single Co_3O_4 Nanoparticles for Oxygen Evolution Reaction

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Deciphering the influence of nanocatalyst morphology on their catalytic activity in the oxygen evolution reaction (OER), the limiting reaction in water splitting process, is essential to develop highly active precious metal-free catalysts, yet poorly understood. The intrinsic OER activity of Co_3O_4 nanocubes and spheroids is probed at the single particle level to unravel the correlation between exposed facets, (001) vs. (111), and activity. Single cubes with predominant (001) facets show higher activity than multi-faceted spheroids. Density functional theory calculations of different terminations and reaction sites at (001) and (111) surfaces confirm the higher activity of the former, expressed in lower overpotentials. This is rationalized by a change in the active site from octahedral to tetrahedral Co and the potential-determining step from *OH to *O for the cases with lowest overpotentials at the (001) and (111) surfaces, respectively. This approach enables the identification of highly active facets to guide shapeselective syntheses of improved metal oxide nanocatalysts for water oxidation.

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《Advanced functional materials》 |2023年第1期|2210945.1-2210945.8|共8页
作者
Zhibin Liu; Hatem M. A. Amin; Yuman PengManuel CorvaRossitza PentchevaKristina Tschulik;
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Analytical Chemistry Ⅱ Faculty of Chemistry and Biochemistry Ruhr University Bochum 44801 Bochum, Germany;

Analytical Chemistry Ⅱ Faculty of Chemistry and Biochemistry Ruhr University Bochum 44801 Bochum, Germany,Chemistry Department Faculty of Science Cairo University Giza 12613, Egypt;

Theoretical Physics Faculty of Physics and Center for Nanointegration (CENIDE) University Duisburg-Essen 47057 Duisburg, GermanyAnalytical Chemistry Ⅱ Faculty of Chemistry and Biochemistry Ruhr University Bochum 44801 Bochum, Germany,Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Stra?e 1, 40237 Düsseldorf, Germany;

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正文语种英语
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cobalt oxides; density functional theory calculations; single entity electrochemistry; surface facets; water splitting;

Facet-Dependent Intrinsic Activity of Single Co_3O_4 Nanoparticles for Oxygen Evolution Reaction

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