Strong High Entropy Alloy-Support Interaction Enables Efficient Electrocatalytic Water Splitting at High Current Density

Hongdong Li, Yue Pan, Jianping Lai*, Lei Wang* and Shouhua Feng

Chin. J. Struct. Chem. 2022, 41, 2208003-2208011  DOI: 10.14102/j.cnki.0254-5861.2022-0125

July 25, 2022

high entropy alloy, metal-support interactions, microwave heating, water splitting, activity and durability

ABSTRACT

In electrocatalysis, the stability issue between catalyst and support still needs great attention. Here, a series of high-  entropy alloy nanoparticles (HEA-NPs) embedded in carbon cloth (CC) were synthesized by using the scalable strategy-microwave heating. Among them, PtRhCoNiCu/CC exhibits outstanding hydrogen evolution reaction (HER) activity (19 and 170 mV overpotential at 10 and 1000 mA cm-2) and stability (150 h), outperforming other recently reported HEAs catalysts. IrRuCoNiCu/CC displays superior oxygen evolution reaction (OER) activity (166 and 354 mV overpotential at 10 and 1000 mA cm-2) and stability (150 h), and shows a lower overpotential than recently reported HEA catalysts. In water splitting, IrRuCoNiCu/CC(+)//PtRhCoNiCu/CC(-) electrolyzer achieves 500 mA cm-2 (1000 mA cm-2) high current density at 1.76 V (1.88 V) and exhibits excellent stability, which is one of the best catalysts currently. Therefore, the novel supported HEA catalyst with high stability is expected to be a promising candidate material for industrialized water splitting.



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