An electron deficiency strategy for enhancing hydrogen evolution on CoP nano-electrocatalysts

Hanbin Liao; Yuanmiao Sun; Chencheng Dai; Yonghua Du; Shibo Xi; Fei Liu; Linghui Yu; Ziyu Yang; Yanglong Hou; Adrian C. Fisher; Shuzhou Li; Zhichuan J. Xu

doi:10.1016/j.nanoen.2018.05.060

An electron deficiency strategy for enhancing hydrogen evolution on CoP nano-electrocatalysts

Hanbin Liao, Yuanmiao Sun, Chencheng Dai, Yonghua Du, Shibo Xi, Fei Liu, Linghui Yu, Ziyu Yang, Yanglong Hou, Adrian C. Fisher, Shuzhou Li^*, Zhichuan J. Xu

^*Corresponding author for this work

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

99 Citations (Scopus)

Abstract

Optimizing the hydrogen adsorption on electrodes is one of the most effective strategies to promote the hydrogen evolution reaction (HER). In recent years, cobalt phosphides (CoP) have been identified as a promising catalyst for HER in acid. However, the hydrogen adsorption on CoP is strong and a considerable overpotential has to be applied to enable HER. Here, we report a strategy to weaken the hydrogen adsorption on CoP through an electron deficiency in CoP induced by Au@CoP core/shell structure. A weakened hydrogen adsorption is confirmed by the density functional theory (DFT) calculation. Au@CoP gave an overpotential (η) of 160 mV at the current density of 1 mA cm⁻² _CoP, which is about 50 mV less than pure CoP. It also exhibited a turn-over frequency (TOF) value of 0.68 s⁻¹ per active site at η = 150 mV, which is more than 4 times higher than CoP. The strategy reported here holds potential to be extended to other electrodes for optimizing their hydrogen adsorption for HER.

Original language	English
Pages (from-to)	273-280
Number of pages	8
Journal	Nano Energy
Volume	50
DOIs	https://doi.org/10.1016/j.nanoen.2018.05.060
Publication status	Published - Aug 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 Elsevier Ltd

ASJC Scopus Subject Areas

Renewable Energy, Sustainability and the Environment
General Materials Science
Electrical and Electronic Engineering

Keywords

Cobalt phosphide
Core/shell
Electron deficiency
Gold
Hydrogen evolution reaction

UN SDGs

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

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10.1016/j.nanoen.2018.05.060

Cite this

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title = "An electron deficiency strategy for enhancing hydrogen evolution on CoP nano-electrocatalysts",

abstract = "Optimizing the hydrogen adsorption on electrodes is one of the most effective strategies to promote the hydrogen evolution reaction (HER). In recent years, cobalt phosphides (CoP) have been identified as a promising catalyst for HER in acid. However, the hydrogen adsorption on CoP is strong and a considerable overpotential has to be applied to enable HER. Here, we report a strategy to weaken the hydrogen adsorption on CoP through an electron deficiency in CoP induced by Au@CoP core/shell structure. A weakened hydrogen adsorption is confirmed by the density functional theory (DFT) calculation. Au@CoP gave an overpotential (η) of 160 mV at the current density of 1 mA cm−2 CoP, which is about 50 mV less than pure CoP. It also exhibited a turn-over frequency (TOF) value of 0.68 s−1 per active site at η = 150 mV, which is more than 4 times higher than CoP. The strategy reported here holds potential to be extended to other electrodes for optimizing their hydrogen adsorption for HER.",

keywords = "Cobalt phosphide, Core/shell, Electron deficiency, Gold, Hydrogen evolution reaction",

author = "Hanbin Liao and Yuanmiao Sun and Chencheng Dai and Yonghua Du and Shibo Xi and Fei Liu and Linghui Yu and Ziyu Yang and Yanglong Hou and Fisher, {Adrian C.} and Shuzhou Li and Xu, {Zhichuan J.}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = aug,

doi = "10.1016/j.nanoen.2018.05.060",

language = "English",

volume = "50",

pages = "273--280",

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T1 - An electron deficiency strategy for enhancing hydrogen evolution on CoP nano-electrocatalysts

AU - Liao, Hanbin

AU - Sun, Yuanmiao

AU - Dai, Chencheng

AU - Du, Yonghua

AU - Xi, Shibo

AU - Liu, Fei

AU - Yu, Linghui

AU - Yang, Ziyu

AU - Hou, Yanglong

AU - Fisher, Adrian C.

AU - Li, Shuzhou

AU - Xu, Zhichuan J.

PY - 2018/8

Y1 - 2018/8

N2 - Optimizing the hydrogen adsorption on electrodes is one of the most effective strategies to promote the hydrogen evolution reaction (HER). In recent years, cobalt phosphides (CoP) have been identified as a promising catalyst for HER in acid. However, the hydrogen adsorption on CoP is strong and a considerable overpotential has to be applied to enable HER. Here, we report a strategy to weaken the hydrogen adsorption on CoP through an electron deficiency in CoP induced by Au@CoP core/shell structure. A weakened hydrogen adsorption is confirmed by the density functional theory (DFT) calculation. Au@CoP gave an overpotential (η) of 160 mV at the current density of 1 mA cm−2 CoP, which is about 50 mV less than pure CoP. It also exhibited a turn-over frequency (TOF) value of 0.68 s−1 per active site at η = 150 mV, which is more than 4 times higher than CoP. The strategy reported here holds potential to be extended to other electrodes for optimizing their hydrogen adsorption for HER.

AB - Optimizing the hydrogen adsorption on electrodes is one of the most effective strategies to promote the hydrogen evolution reaction (HER). In recent years, cobalt phosphides (CoP) have been identified as a promising catalyst for HER in acid. However, the hydrogen adsorption on CoP is strong and a considerable overpotential has to be applied to enable HER. Here, we report a strategy to weaken the hydrogen adsorption on CoP through an electron deficiency in CoP induced by Au@CoP core/shell structure. A weakened hydrogen adsorption is confirmed by the density functional theory (DFT) calculation. Au@CoP gave an overpotential (η) of 160 mV at the current density of 1 mA cm−2 CoP, which is about 50 mV less than pure CoP. It also exhibited a turn-over frequency (TOF) value of 0.68 s−1 per active site at η = 150 mV, which is more than 4 times higher than CoP. The strategy reported here holds potential to be extended to other electrodes for optimizing their hydrogen adsorption for HER.

KW - Cobalt phosphide

KW - Core/shell

KW - Electron deficiency

KW - Gold

KW - Hydrogen evolution reaction

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DO - 10.1016/j.nanoen.2018.05.060

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SN - 2211-2855

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JO - Nano Energy

JF - Nano Energy

ER -

An electron deficiency strategy for enhancing hydrogen evolution on CoP nano-electrocatalysts

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

UN SDGs

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