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Surface distortion of FeRu nanoparticles improves the hydrogen evolution reaction performance in alkaline media

Authors
Kim, Hee JinHong, EunseoHong, YonghoonKim, JeonghyeonKabiraz, Mrinal KantiKim, Young-MinLee, HangilSeo, Won SeokChoi, Sang-Il
Issue Date
Mar-2023
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE, v.15, no.12, pp 5816 - 5824
Pages
9
Journal Title
NANOSCALE
Volume
15
Number
12
Start Page
5816
End Page
5824
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/152010
DOI
10.1039/d2nr05881b
ISSN
2040-3364
2040-3372
Abstract
Rational design of electrocatalysts, including an increased catalytic surface area, a unique surface structure, and improved conductivity, for facilitating the hydrogen evolution reaction (HER) is emerging as an important issue. In this work, we consider the engineering of catalyst surfaces as an effective and feasible way to accelerate the HER kinetics. By etching the surface Fe of FeRu alloy nanoparticles (NPs) using hydrofluoric acid (HF), a distorted catalytic surface of FeRu NPs was formed. The distorted surface of the HF-treated FeRu NPs was successfully analyzed by X-ray absorption spectroscopy, high-resolution photoemission spectroscopy, and electrochemical absorption/desorption experiments. The electrocatalytic HER activity of the HF-treated FeRu NPs demonstrated that surface distortion enhances the water dissociation reaction and the electron transfer rate. As a result, the surface-distorted FeRu NPs improved HER performances in alkaline media compared to the pristine FeRu alloy NP/C, commercial Ru/C, and the state-of-the-art Pt/C catalysts.
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