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

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

17 Citations (Scopus)

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. © 2022 Elsevier Ltd.

Original language	English
Article number	141596
Journal	Electrochimica Acta
Volume	439
Online published	23 Nov 2022
DOIs	https://doi.org/10.1016/j.electacta.2022.141596
Publication status	Published - 20 Jan 2023

Research Keywords

HER/OER
Surface admittance
Surface adsorption
Transition-metal-doped MoS2

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.electacta.2022.141596

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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. {\textcopyright} 2022 Elsevier Ltd. ",

keywords = "HER/OER, Surface admittance, Surface adsorption, Transition-metal-doped MoS2",

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.}",

year = "2023",

month = jan,

day = "20",

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

language = "English",

volume = "439",

journal = "Electrochimica Acta",

issn = "0013-4686",

publisher = "Elsevier Ltd.",

}

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. © 2022 Elsevier Ltd.

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. © 2022 Elsevier Ltd.

KW - HER/OER

KW - Surface admittance

KW - Surface adsorption

KW - Transition-metal-doped MoS2

UR - http://www.scopus.com/inward/record.url?scp=85143167400&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85143167400&origin=recordpage

U2 - 10.1016/j.electacta.2022.141596

DO - 10.1016/j.electacta.2022.141596

M3 - RGC 21 - Publication in refereed journal

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

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

Abstract

Research Keywords

UN SDGs

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DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

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