November 11, 2025ACS Nano

Stable Hexagonal Close-Packed CoRu/C Nanocrystals for Highly Efficient Hydrogen Oxidation Electrocatalysis

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Electrocatalysts engineered with hcp CoRu show superior activity and CO tolerance in alkaline fuel cells, suggesting a new design approach.

Increased electrocatalyst performance improves the hydrogen oxidation reaction in fuel cells, highlighting CO tolerance benefits.
The hcp CoRu/C catalyst exhibits a remarkable mass activity of 886 A gRu−1 surpassing traditional catalysts like Pt/C and Ru/C.
Assessment using density functional theory calculations reveals insights on hydrogen and hydroxyl adsorption energy optimization.
This approach emphasizes crystallographic phase engineering as a promising method for advancing alkaline fuel cell technology.

Zhang et al. (2025) studied this question.

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Electrocatalysts engineered with hcp CoRu show superior activity and CO tolerance in alkaline fuel cells, suggesting a new design approach.