CoP nanosheet assembly grown on carbon cloth: A highly efficient electrocatalyst for hydrogen generation

Xiulin Yang; Ang-Yu Lu; Yihan Zhu; Mohamed N. Hedhili; Shixiong Min; Kuo-Wei Huang; Yu Han; Lain-Jong Li

doi:10.1016/j.nanoen.2015.05.026

CoP nanosheet assembly grown on carbon cloth: A highly efficient electrocatalyst for hydrogen generation

Xiulin Yang, Ang-Yu Lu, Yihan Zhu, Mohamed N. Hedhili, Shixiong Min, Kuo-Wei Huang, Yu Han, Lain-Jong Li

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

365 Scopus citations

Abstract

There exists a strong demand to replace expensive noble metal catalysts with cheap metal sulfides or phosphides for hydrogen evolution reaction (HER). Recently metal phosphides such as NixP, FeP and CoP have been considered as promising candidates to replace Pt cathodes. Here we report that the nanocrystalline CoP nanosheet assembly on carbon cloth can be formed by a two-step process: electrochemical deposition of Co species followed by gas phase phosphidation. The CoP catalyst in this report exhibits a Tafel slope of 30.1mV/dec in 0.5M H2SO4 and 42.6mV/dec in 1M KOH. The high HER performance of our CoP catalysts is attributed to the rugae-like morphology which results in a high double-layer capacitance and high density of active sites, estimated as 7.77×1017sites/cm2. © 2015 Elsevier Ltd.

Original language	English (US)
Pages (from-to)	634-641
Number of pages	8
Journal	Nano Energy
Volume	15
DOIs	https://doi.org/10.1016/j.nanoen.2015.05.026
State	Published - Jul 2015

ASJC Scopus subject areas

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

UN SDGs

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

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10.1016/j.nanoen.2015.05.026

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title = "CoP nanosheet assembly grown on carbon cloth: A highly efficient electrocatalyst for hydrogen generation",

abstract = "There exists a strong demand to replace expensive noble metal catalysts with cheap metal sulfides or phosphides for hydrogen evolution reaction (HER). Recently metal phosphides such as NixP, FeP and CoP have been considered as promising candidates to replace Pt cathodes. Here we report that the nanocrystalline CoP nanosheet assembly on carbon cloth can be formed by a two-step process: electrochemical deposition of Co species followed by gas phase phosphidation. The CoP catalyst in this report exhibits a Tafel slope of 30.1mV/dec in 0.5M H2SO4 and 42.6mV/dec in 1M KOH. The high HER performance of our CoP catalysts is attributed to the rugae-like morphology which results in a high double-layer capacitance and high density of active sites, estimated as 7.77×1017sites/cm2. {\textcopyright} 2015 Elsevier Ltd.",

author = "Xiulin Yang and Ang-Yu Lu and Yihan Zhu and Hedhili, {Mohamed N.} and Shixiong Min and Kuo-Wei Huang and Yu Han and Lain-Jong Li",

note = "KAUST Repository Item: Exported on 2020-10-01",

year = "2015",

month = jul,

doi = "10.1016/j.nanoen.2015.05.026",

language = "English (US)",

volume = "15",

pages = "634--641",

journal = "Nano Energy",

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TY - JOUR

T1 - CoP nanosheet assembly grown on carbon cloth: A highly efficient electrocatalyst for hydrogen generation

AU - Yang, Xiulin

AU - Lu, Ang-Yu

AU - Zhu, Yihan

AU - Hedhili, Mohamed N.

AU - Min, Shixiong

AU - Huang, Kuo-Wei

AU - Han, Yu

AU - Li, Lain-Jong

N1 - KAUST Repository Item: Exported on 2020-10-01

PY - 2015/7

Y1 - 2015/7

N2 - There exists a strong demand to replace expensive noble metal catalysts with cheap metal sulfides or phosphides for hydrogen evolution reaction (HER). Recently metal phosphides such as NixP, FeP and CoP have been considered as promising candidates to replace Pt cathodes. Here we report that the nanocrystalline CoP nanosheet assembly on carbon cloth can be formed by a two-step process: electrochemical deposition of Co species followed by gas phase phosphidation. The CoP catalyst in this report exhibits a Tafel slope of 30.1mV/dec in 0.5M H2SO4 and 42.6mV/dec in 1M KOH. The high HER performance of our CoP catalysts is attributed to the rugae-like morphology which results in a high double-layer capacitance and high density of active sites, estimated as 7.77×1017sites/cm2. © 2015 Elsevier Ltd.

AB - There exists a strong demand to replace expensive noble metal catalysts with cheap metal sulfides or phosphides for hydrogen evolution reaction (HER). Recently metal phosphides such as NixP, FeP and CoP have been considered as promising candidates to replace Pt cathodes. Here we report that the nanocrystalline CoP nanosheet assembly on carbon cloth can be formed by a two-step process: electrochemical deposition of Co species followed by gas phase phosphidation. The CoP catalyst in this report exhibits a Tafel slope of 30.1mV/dec in 0.5M H2SO4 and 42.6mV/dec in 1M KOH. The high HER performance of our CoP catalysts is attributed to the rugae-like morphology which results in a high double-layer capacitance and high density of active sites, estimated as 7.77×1017sites/cm2. © 2015 Elsevier Ltd.

UR - http://hdl.handle.net/10754/564191

UR - https://linkinghub.elsevier.com/retrieve/pii/S2211285515002426

UR - http://www.scopus.com/inward/record.url?scp=84930944362&partnerID=8YFLogxK

U2 - 10.1016/j.nanoen.2015.05.026

DO - 10.1016/j.nanoen.2015.05.026

M3 - Article

SN - 2211-2855

VL - 15

SP - 634

EP - 641

JO - Nano Energy

JF - Nano Energy

ER -

CoP nanosheet assembly grown on carbon cloth: A highly efficient electrocatalyst for hydrogen generation

Abstract

ASJC Scopus subject areas

UN SDGs

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