Surface-Diffusion-Induced Amorphization of Pt Nanoparticles over Ru Oxide Boost Acidic Oxygen Evolution

Surface-Diffusion-Induced Amorphization of Pt Nanoparticles over Ru Oxide Boost Acidic Oxygen Evolution

Phase transformation offers an alternative strategy for the synthesis of nanomaterials with unconventional phases, allowing us to further explore their unique properties and promising applications. Herein, we first observed the amorphization of Pt nanoparticles on the RuO2 surface by in situ scannin...

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Veröffentlicht in:Nano letters 2024-05, Vol.24 (17), p.5324-5331
Hauptverfasser: Hu, Yanmin, Han, Xiao, Hu, Shaojin, Yu, Ge, Chao, Tingting, Wu, Geng, Qu, Yunteng, Chen, Cai, Liu, Peigen, Zheng, Xiao, Yang, Qing, Hong, Xun
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container_end_page 5331
container_issue 17
container_start_page 5324
container_title Nano letters
container_volume 24
creator Hu, Yanmin
Han, Xiao
Hu, Shaojin
Yu, Ge
Chao, Tingting
Wu, Geng
Qu, Yunteng
Chen, Cai
Liu, Peigen
Zheng, Xiao
Yang, Qing
Hong, Xun
description Phase transformation offers an alternative strategy for the synthesis of nanomaterials with unconventional phases, allowing us to further explore their unique properties and promising applications. Herein, we first observed the amorphization of Pt nanoparticles on the RuO2 surface by in situ scanning transmission electron microscopy. Density functional theory calculations demonstrate the low energy barrier and thermodynamic driving force for Pt atoms transferring from the Pt cluster to the RuO2 surface to form amorphous Pt. Remarkably, the as-synthesized amorphous Pt/RuO2 exhibits 14.2 times enhanced mass activity compared to commercial RuO2 catalysts for the oxygen evolution reaction (OER). Water electrolyzer with amorphous Pt/RuO2 achieves 1.0 A cm–2 at 1.70 V and remains stable at 200 mA cm–2 for over 80 h. The amorphous Pt layer not only optimized the *O binding but also enhanced the antioxidation ability of amorphous Pt/RuO2, thereby boosting the activity and stability for the OER.
doi_str_mv 10.1021/acs.nanolett.4c01036
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title Surface-Diffusion-Induced Amorphization of Pt Nanoparticles over Ru Oxide Boost Acidic Oxygen Evolution
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