Enhancing the electrocatalytic water splitting efficiency for amorphous MoSx

Chang Lung Hsu; Yung Huang Chang; Tzu Yin Chen; Chien Chih Tseng; Kung Hwa Wei; Lain Jong Li

doi:10.1016/j.ijhydene.2014.01.090

Enhancing the electrocatalytic water splitting efficiency for amorphous MoS_x

Chang Lung Hsu, Yung Huang Chang, Tzu Yin Chen, Chien Chih Tseng, Kung Hwa Wei, Lain Jong Li^*

^*Corresponding author for this work

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

39 Scopus citations

Abstract

Amorphous molybdenum sulfide (MoS_x) materials have been considered as cheap and promising catalysts for hydrogen evolution reaction (HER). In this contribution, we report that the amorphous MoS_x catalysts prepared by the low temperature thermolysis of the (NH ₄)₂MoS₄ precursors on carbon clothes (catalyst loading: 3.2 mg/cm²) exhibit a Tefal slope of 50.5 mV/dec and a high exchange current density of 1.5 × 10^-3 mA/cm² in 0.5 M H₂SO₄ solutions. Spectroscopic studies of the amorphous MoS_x catalysts show that the increase of HER efficiency is positively correlated to the concentration of S₂^2- species, providing strong evidence to support the argument that S ₂^2- is an active species for electrocatalytic HER. Additionally, the method for preparing catalysts is simple, scalable and applicable for large-scale production.

Original language	English (US)
Pages (from-to)	4788-4793
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	39
Issue number	10
DOIs	https://doi.org/10.1016/j.ijhydene.2014.01.090
State	Published - Mar 26 2014
Externally published	Yes

Keywords

Electrocatalytic reaction
Hydrogen evolution reaction
Molybdenum disulfide
Niobium chloride

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

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

Access to Document

10.1016/j.ijhydene.2014.01.090

Cite this

@article{f118af0328804f55b04df138307e143f,

title = "Enhancing the electrocatalytic water splitting efficiency for amorphous MoSx",

abstract = "Amorphous molybdenum sulfide (MoSx) materials have been considered as cheap and promising catalysts for hydrogen evolution reaction (HER). In this contribution, we report that the amorphous MoSx catalysts prepared by the low temperature thermolysis of the (NH 4)2MoS4 precursors on carbon clothes (catalyst loading: 3.2 mg/cm2) exhibit a Tefal slope of 50.5 mV/dec and a high exchange current density of 1.5 × 10-3 mA/cm2 in 0.5 M H2SO4 solutions. Spectroscopic studies of the amorphous MoSx catalysts show that the increase of HER efficiency is positively correlated to the concentration of S22- species, providing strong evidence to support the argument that S 22- is an active species for electrocatalytic HER. Additionally, the method for preparing catalysts is simple, scalable and applicable for large-scale production.",

keywords = "Electrocatalytic reaction, Hydrogen evolution reaction, Molybdenum disulfide, Niobium chloride",

author = "Hsu, {Chang Lung} and Chang, {Yung Huang} and Chen, {Tzu Yin} and Tseng, {Chien Chih} and Wei, {Kung Hwa} and Li, {Lain Jong}",

year = "2014",

month = mar,

day = "26",

doi = "10.1016/j.ijhydene.2014.01.090",

language = "English (US)",

volume = "39",

pages = "4788--4793",

journal = "International Journal of Hydrogen Energy",

issn = "0360-3199",

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TY - JOUR

T1 - Enhancing the electrocatalytic water splitting efficiency for amorphous MoSx

AU - Hsu, Chang Lung

AU - Chang, Yung Huang

AU - Chen, Tzu Yin

AU - Tseng, Chien Chih

AU - Wei, Kung Hwa

AU - Li, Lain Jong

PY - 2014/3/26

Y1 - 2014/3/26

N2 - Amorphous molybdenum sulfide (MoSx) materials have been considered as cheap and promising catalysts for hydrogen evolution reaction (HER). In this contribution, we report that the amorphous MoSx catalysts prepared by the low temperature thermolysis of the (NH 4)2MoS4 precursors on carbon clothes (catalyst loading: 3.2 mg/cm2) exhibit a Tefal slope of 50.5 mV/dec and a high exchange current density of 1.5 × 10-3 mA/cm2 in 0.5 M H2SO4 solutions. Spectroscopic studies of the amorphous MoSx catalysts show that the increase of HER efficiency is positively correlated to the concentration of S22- species, providing strong evidence to support the argument that S 22- is an active species for electrocatalytic HER. Additionally, the method for preparing catalysts is simple, scalable and applicable for large-scale production.

AB - Amorphous molybdenum sulfide (MoSx) materials have been considered as cheap and promising catalysts for hydrogen evolution reaction (HER). In this contribution, we report that the amorphous MoSx catalysts prepared by the low temperature thermolysis of the (NH 4)2MoS4 precursors on carbon clothes (catalyst loading: 3.2 mg/cm2) exhibit a Tefal slope of 50.5 mV/dec and a high exchange current density of 1.5 × 10-3 mA/cm2 in 0.5 M H2SO4 solutions. Spectroscopic studies of the amorphous MoSx catalysts show that the increase of HER efficiency is positively correlated to the concentration of S22- species, providing strong evidence to support the argument that S 22- is an active species for electrocatalytic HER. Additionally, the method for preparing catalysts is simple, scalable and applicable for large-scale production.

KW - Electrocatalytic reaction

KW - Hydrogen evolution reaction

KW - Molybdenum disulfide

KW - Niobium chloride

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U2 - 10.1016/j.ijhydene.2014.01.090

DO - 10.1016/j.ijhydene.2014.01.090

M3 - Article

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SN - 0360-3199

VL - 39

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 10

ER -