Surface conductance analysis of X-MoS2 (X = Fe, Co, Ni) prepared on graphite felt as bifunctional catalysts for the hydrogen/oxidation evolution reactions

Huiyun Shi; Youyuan Zhang; Ning Pang; Shaohui Xu; Dayuan Xiong; Lianwei Wang; Pingxiong Yang; Paul K. Chu

doi:10.1016/j.electacta.2022.141596

Surface conductance analysis of X-MoS₂ (X = Fe, Co, Ni) prepared on graphite felt as bifunctional catalysts for the hydrogen/oxidation evolution reactions

Huiyun Shi
, Youyuan Zhang
, Ning Pang
, Shaohui Xu^*
, Dayuan Xiong
, Lianwei Wang
, Pingxiong Yang
, Paul K. Chu

^*Corresponding author for this work

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

The surface admittances calculated from electrochemical impedance spectra are used to analyze the surface states of X-MoS₂ (X=Fe, Co, Ni) prepared on graphite felt. Because of the semiconducting properties of Fe-MoS₂ at the electrolyte-semiconductor interface, the bifunctional catalytic properties in the hydrogen/oxidation evolution reactions (HER/OER) are enhanced as a result of better surface adsorption/desorption and slow-changing surface conductance. The surface morphology and electric field between the semiconductor and electrolyte are important parameters affecting the surface properties in HER/OER.

Original language	English
Article number	141596
Journal	Electrochimica Acta
Volume	439
DOIs	https://doi.org/10.1016/j.electacta.2022.141596
State	Published - 20 Jan 2023

Keywords

HER/OER
Surface admittance
Surface adsorption
Transition-metal-doped MoS

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10.1016/j.electacta.2022.141596

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@article{872aea7045404d908154a4c65f678335,

title = "Surface conductance analysis of X-MoS2 (X = Fe, Co, Ni) prepared on graphite felt as bifunctional catalysts for the hydrogen/oxidation evolution reactions",

abstract = "The surface admittances calculated from electrochemical impedance spectra are used to analyze the surface states of X-MoS2 (X=Fe, Co, Ni) prepared on graphite felt. Because of the semiconducting properties of Fe-MoS2 at the electrolyte-semiconductor interface, the bifunctional catalytic properties in the hydrogen/oxidation evolution reactions (HER/OER) are enhanced as a result of better surface adsorption/desorption and slow-changing surface conductance. The surface morphology and electric field between the semiconductor and electrolyte are important parameters affecting the surface properties in HER/OER.",

keywords = "HER/OER, Surface admittance, Surface adsorption, Transition-metal-doped MoS",

author = "Huiyun Shi and Youyuan Zhang and Ning Pang and Shaohui Xu and Dayuan Xiong and Lianwei Wang and Pingxiong Yang and Chu, \{Paul K.\}",

note = "Publisher Copyright: {\textcopyright} 2022",

year = "2023",

month = jan,

day = "20",

doi = "10.1016/j.electacta.2022.141596",

language = "英语",

volume = "439",

journal = "Electrochimica Acta",

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TY - JOUR

T1 - Surface conductance analysis of X-MoS2 (X = Fe, Co, Ni) prepared on graphite felt as bifunctional catalysts for the hydrogen/oxidation evolution reactions

AU - Shi, Huiyun

AU - Zhang, Youyuan

AU - Pang, Ning

AU - Xu, Shaohui

AU - Xiong, Dayuan

AU - Wang, Lianwei

AU - Yang, Pingxiong

AU - Chu, Paul K.

PY - 2023/1/20

Y1 - 2023/1/20

N2 - The surface admittances calculated from electrochemical impedance spectra are used to analyze the surface states of X-MoS2 (X=Fe, Co, Ni) prepared on graphite felt. Because of the semiconducting properties of Fe-MoS2 at the electrolyte-semiconductor interface, the bifunctional catalytic properties in the hydrogen/oxidation evolution reactions (HER/OER) are enhanced as a result of better surface adsorption/desorption and slow-changing surface conductance. The surface morphology and electric field between the semiconductor and electrolyte are important parameters affecting the surface properties in HER/OER.

AB - The surface admittances calculated from electrochemical impedance spectra are used to analyze the surface states of X-MoS2 (X=Fe, Co, Ni) prepared on graphite felt. Because of the semiconducting properties of Fe-MoS2 at the electrolyte-semiconductor interface, the bifunctional catalytic properties in the hydrogen/oxidation evolution reactions (HER/OER) are enhanced as a result of better surface adsorption/desorption and slow-changing surface conductance. The surface morphology and electric field between the semiconductor and electrolyte are important parameters affecting the surface properties in HER/OER.

KW - HER/OER

KW - Surface admittance

KW - Surface adsorption

KW - Transition-metal-doped MoS

UR - https://www.scopus.com/pages/publications/85143167400

U2 - 10.1016/j.electacta.2022.141596

DO - 10.1016/j.electacta.2022.141596

M3 - 文章

AN - SCOPUS:85143167400

SN - 0013-4686

VL - 439

JO - Electrochimica Acta

JF - Electrochimica Acta

M1 - 141596

ER -

Surface conductance analysis of X-MoS₂ (X = Fe, Co, Ni) prepared on graphite felt as bifunctional catalysts for the hydrogen/oxidation evolution reactions

Abstract

Keywords

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