Regulating Ir−O Covalency to Boost Acidic Oxygen Evolution Reaction
Jiayan Wu,
Wenwu Zou,
Jiaxi Zhang
et al.
Abstract:The unsatisfactory oxygen evolution reaction (OER) activity of IrO2 has intensively raised the cost and energy consumption of hydrogen generation from proton exchange membrane water electrolyzers. Here, the acidic OER activity of the rutile IrO2 is significantly enhanced by the incorporation of trivalent metals (e.g., Gd, Nd, and Pr) to increase the Ir−O covalency, while the high‐valence (pentavalent or higher) metal incorporation decreases the Ir−O covalency resulting in worse OER activity. Experimental and t… Show more
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