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Rational Design and Characterization on RuO2-Based Catalysts for Acidic Oxygen Evolution Reaction Guided by Reaction Pathway Regulation
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DOI：10.1039/D6NR01469K.png)
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Abstract
En 中文
Ruthenium dioxide (RuO2) is regarded as a promising alternative to iridium-based catalysts for the oxygen evolution reaction (OER) in proton exchange membrane water electrolyzers (PEMWE); owing to its high intrinsic activity and relatively lower cost. Nevertheless; the activity-stability trade-off induced by competing reaction pathways under harsh acidic conditions severely restricts the large-scale industrial application of RuO2 catalysts. In-depth understanding of these reaction pathways is therefore critical for the precise structural design and performance optimization of RuO2-based catalysts. This review systematically summarizes three mainstream OER mechanisms of RuO2 catalysts in acidic environments; namely the adsorbate evolution mechanism (AEM); lattice oxygen-mediated mechanism (LOM); and oxide path mechanism (OPM). Subsequently; recent advances in reaction pathways regulation strategies; such as element doping; heterostructure engineering; defect engineering; are highlighted with the aim to break the activity-stability limitation. Furthermore; the critical role of in situ characterization technologies during the OER process in identifying reaction intermediates and dynamic structural evolution is discussed. Finally; the remaining challenges and future directions for achieving precise control and industrial-scale application are outlined; providing a foundation for designing high-performance; durable RuO2-based catalysts for sustainable hydrogen production.
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5.1
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