Synthesis of high-entropy alloy nanoparticles using microwave-assisted reduction and investigation of their enhanced electrochemical hydrogen evolution activity

High-entropy alloys (HEAs) are fascinating materials for novel catalysts because of their broad compositional space, which is enabled by entropy-driven mixing. Herein, HEA nanoparticles (NPs) containing Fe, Co, Ni, Cu, and Pd were successfully synthesized on reduced graphene oxide (rGO) by microwave...

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Bibliographic Details
Published in:Chemistry letters 2024-02, Vol.53 (2)
Main Authors: Hashimoto, Naoki, Kitaura, Ryota, Mori, Kohsuke, Yamashita, Hiromi
Format: Article
Language:English
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Summary:High-entropy alloys (HEAs) are fascinating materials for novel catalysts because of their broad compositional space, which is enabled by entropy-driven mixing. Herein, HEA nanoparticles (NPs) containing Fe, Co, Ni, Cu, and Pd were successfully synthesized on reduced graphene oxide (rGO) by microwave-assisted reduction. Compared with the corresponding monometallic catalysts, the quinary FeCoNiCuPd/rGO demonstrated greater electrocatalytic activity toward the acidic hydrogen evolution reaction. Density functional theory calculations revealed that modification of the d-band center and the hydrogen affinity induced by multielemental mixing enhanced the electrocatalytic performance of the HEA.
ISSN:0366-7022
1348-0715
DOI:10.1093/chemle/upad055