Electrochemical characterization of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysis

Ji Eun Kim; Ki Kwang Bae; Chu Sik Park; Seong Uk Jeong; Kyeong Ho Baik; Jeong Won Kim; Kyoung Soo Kang; Ki Bong Lee; Young Ho Kim

doi:10.1016/j.jiec.2018.10.010

Electrochemical characterization of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysis

Ji Eun Kim, Ki Kwang Bae, Chu Sik Park, Seong Uk Jeong, Kyeong Ho Baik, Jeong Won Kim, Kyoung Soo Kang, Ki Bong Lee, Young Ho Kim

Department of Chemical and Biological Engineering

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

14 Citations (Scopus)

Abstract

A Raney Ni electrode was prepared by the simple and economical atmospheric plasma spraying method. It showed excellent performance for hydrogen evolution reaction (HER), as indicated by a Tafel slope of 54 mV/dec and overvoltage of 108 mV at 300 mA/cm². The Ni–Al alloy coating contained a NiAl phase, which has a very slow Al leaching rate in alkaline solution. H₂ heat treatment of the electrode enhanced the uniformity of Al distribution in the coating and adhesion of the coating to the substrate. However, the HER performance did not improve and the electrode was rendered more structurally vulnerable to deactivation.

Original language	English
Pages (from-to)	160-168
Number of pages	9
Journal	Journal of Industrial and Engineering Chemistry
Volume	70
DOIs	https://doi.org/10.1016/j.jiec.2018.10.010
Publication status	Published - 2019 Feb 25

Keywords

Alkaline electrolysis
Atmospheric plasma spraying
Electrode deactivation
Hydrogen evolution reaction
Raney nickel
Water electrolysis

ASJC Scopus subject areas

Chemical Engineering(all)

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10.1016/j.jiec.2018.10.010

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@article{06c3ff6771b1464a9db434b45fa85c53,

title = "Electrochemical characterization of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysis",

abstract = "A Raney Ni electrode was prepared by the simple and economical atmospheric plasma spraying method. It showed excellent performance for hydrogen evolution reaction (HER), as indicated by a Tafel slope of 54 mV/dec and overvoltage of 108 mV at 300 mA/cm2. The Ni–Al alloy coating contained a NiAl phase, which has a very slow Al leaching rate in alkaline solution. H2 heat treatment of the electrode enhanced the uniformity of Al distribution in the coating and adhesion of the coating to the substrate. However, the HER performance did not improve and the electrode was rendered more structurally vulnerable to deactivation.",

keywords = "Alkaline electrolysis, Atmospheric plasma spraying, Electrode deactivation, Hydrogen evolution reaction, Raney nickel, Water electrolysis",

author = "Kim, {Ji Eun} and Bae, {Ki Kwang} and Park, {Chu Sik} and Jeong, {Seong Uk} and Baik, {Kyeong Ho} and Kim, {Jeong Won} and Kang, {Kyoung Soo} and Lee, {Ki Bong} and Kim, {Young Ho}",

note = "Funding Information: This work was supported by the “Renewable Energy Program” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20173030041350 ). Publisher Copyright: {\textcopyright} 2018 The Korean Society of Industrial and Engineering Chemistry",

year = "2019",

month = feb,

day = "25",

doi = "10.1016/j.jiec.2018.10.010",

language = "English",

volume = "70",

pages = "160--168",

journal = "Journal of Industrial and Engineering Chemistry",

issn = "1226-086X",

publisher = "Korean Society of Industrial Engineering Chemistry",

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TY - JOUR

T1 - Electrochemical characterization of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysis

AU - Kim, Ji Eun

AU - Bae, Ki Kwang

AU - Park, Chu Sik

AU - Jeong, Seong Uk

AU - Baik, Kyeong Ho

AU - Kim, Jeong Won

AU - Kang, Kyoung Soo

AU - Lee, Ki Bong

AU - Kim, Young Ho

N1 - Funding Information: This work was supported by the “Renewable Energy Program” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20173030041350 ). Publisher Copyright: © 2018 The Korean Society of Industrial and Engineering Chemistry

PY - 2019/2/25

Y1 - 2019/2/25

N2 - A Raney Ni electrode was prepared by the simple and economical atmospheric plasma spraying method. It showed excellent performance for hydrogen evolution reaction (HER), as indicated by a Tafel slope of 54 mV/dec and overvoltage of 108 mV at 300 mA/cm2. The Ni–Al alloy coating contained a NiAl phase, which has a very slow Al leaching rate in alkaline solution. H2 heat treatment of the electrode enhanced the uniformity of Al distribution in the coating and adhesion of the coating to the substrate. However, the HER performance did not improve and the electrode was rendered more structurally vulnerable to deactivation.

AB - A Raney Ni electrode was prepared by the simple and economical atmospheric plasma spraying method. It showed excellent performance for hydrogen evolution reaction (HER), as indicated by a Tafel slope of 54 mV/dec and overvoltage of 108 mV at 300 mA/cm2. The Ni–Al alloy coating contained a NiAl phase, which has a very slow Al leaching rate in alkaline solution. H2 heat treatment of the electrode enhanced the uniformity of Al distribution in the coating and adhesion of the coating to the substrate. However, the HER performance did not improve and the electrode was rendered more structurally vulnerable to deactivation.

KW - Alkaline electrolysis

KW - Atmospheric plasma spraying

KW - Electrode deactivation

KW - Hydrogen evolution reaction

KW - Raney nickel

KW - Water electrolysis

UR - http://www.scopus.com/inward/record.url?scp=85057196346&partnerID=8YFLogxK

U2 - 10.1016/j.jiec.2018.10.010

DO - 10.1016/j.jiec.2018.10.010

M3 - Article

AN - SCOPUS:85057196346

SN - 1226-086X

VL - 70

SP - 160

EP - 168

JO - Journal of Industrial and Engineering Chemistry

JF - Journal of Industrial and Engineering Chemistry

ER -

Electrochemical characterization of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysis

Abstract

Keywords

ASJC Scopus subject areas

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