Breaking the Ru−O−Ru Symmetry of a RuO2 Catalyst for Sustainable Acidic Water Oxidation
Proton exchange membrane water electrolysis is a highly promising hydrogen production technique for sustainable energy supply, however, achieving a highly active and durable catalyst for acidic water oxidation still remains a formidable challenge. Herein, we propose a local microenvironment regulati...
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Published in | Angewandte Chemie International Edition Vol. 63; no. 3; pp. e202316903 - n/a |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
Wiley Subscription Services, Inc
15.01.2024
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Edition | International ed. in English |
Subjects | |
Online Access | Get full text |
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Summary: | Proton exchange membrane water electrolysis is a highly promising hydrogen production technique for sustainable energy supply, however, achieving a highly active and durable catalyst for acidic water oxidation still remains a formidable challenge. Herein, we propose a local microenvironment regulation strategy for precisely tuning In−RuO2/graphene (In−RuO2/G) catalyst with intrinsic electrochemical activity and stability to boost acidic water oxidation. The In−RuO2/G displays robust acid oxygen evolution reaction performance with a mass activity of 671 A gcat−1 at 1.5 V, an overpotential of 187 mV at 10 mA cm−2, and long‐lasting stability of 350 h at 100 mA cm−2, which arises from the asymmetric Ru−O−In local structure interactions. Further, it is unraveled theoretically that the asymmetric Ru−O−In structure breaks the thermodynamic activity limit of the traditional adsorption evolution mechanism which significantly weakens the formation energy barrier of OOH*, thus inducing a new rate‐determining step of OH* absorption. Therefore, this strategy showcases the immense potential for constructing high‐performance acidic catalysts for water electrolyzers.
The asymmetric Ru−O−In active structure exhibits impressive electrocatalytic performance for acid oxygen evolution reaction, which is significantly enhanced by the contracted Ru−O bond compared to RuO2. |
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Bibliography: | These authors contributed equally to this work. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1433-7851 1521-3773 |
DOI: | 10.1002/anie.202316903 |