Activation of a Ni electrocatalyst through spontaneous transformation of nickel sulfide to nickel hydroxide in an oxygen evolution reaction

Minoh Lee; Hyung Suk Oh; Min Kyung Cho; Jae Pyoung Ahn; Yun Jeong Hwang; Byoung Koun Min

doi:10.1016/j.apcatb.2018.03.083

Activation of a Ni electrocatalyst through spontaneous transformation of nickel sulfide to nickel hydroxide in an oxygen evolution reaction

Minoh Lee, Hyung Suk Oh, Min Kyung Cho, Jae Pyoung Ahn, Yun Jeong Hwang, Byoung Koun Min

GREEN SCHOOL (Graduate School of Energy and Environment)

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

80 Citations (Scopus)

Abstract

Ni-sulfide compounds synthesized on Ni foam by simple thermal sulfurization are employed as electrocatalysts for water oxidation, resulting in superior activity in alkaline electrolyte media. The role of sulfur in Ni-sulfide was found to be an activator that transformed sulfide into hydroxide, which was eventually transformed into (oxy)hydroxide. The Ni-(oxy)hydroxide phase was also found to be layered and/or amorphous. This activated catalyst showed significant enhancement in water oxidation performance with a low overpotential value of 256 mV at current density of 10 mA cm⁻². Our observation could offer important insight into metal-chalcogenide electrocatalyst for water oxidation.

Original language	English
Pages (from-to)	130-135
Number of pages	6
Journal	Applied Catalysis B: Environmental
Volume	233
DOIs	https://doi.org/10.1016/j.apcatb.2018.03.083
Publication status	Published - 2018 Oct 5

Keywords

Electrocatalyst
Metal-chalcogenide
Nickel hydroxide
Nickel sulfide
Oxygen evolution reaction

ASJC Scopus subject areas

Catalysis
Environmental Science(all)
Process Chemistry and Technology

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10.1016/j.apcatb.2018.03.083

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title = "Activation of a Ni electrocatalyst through spontaneous transformation of nickel sulfide to nickel hydroxide in an oxygen evolution reaction",

abstract = "Ni-sulfide compounds synthesized on Ni foam by simple thermal sulfurization are employed as electrocatalysts for water oxidation, resulting in superior activity in alkaline electrolyte media. The role of sulfur in Ni-sulfide was found to be an activator that transformed sulfide into hydroxide, which was eventually transformed into (oxy)hydroxide. The Ni-(oxy)hydroxide phase was also found to be layered and/or amorphous. This activated catalyst showed significant enhancement in water oxidation performance with a low overpotential value of 256 mV at current density of 10 mA cm−2. Our observation could offer important insight into metal-chalcogenide electrocatalyst for water oxidation.",

keywords = "Electrocatalyst, Metal-chalcogenide, Nickel hydroxide, Nickel sulfide, Oxygen evolution reaction",

author = "Minoh Lee and Oh, {Hyung Suk} and Cho, {Min Kyung} and Ahn, {Jae Pyoung} and Hwang, {Yun Jeong} and Min, {Byoung Koun}",

note = "Funding Information: This research was supported by the program of the Korea Institute of Science and Technology (KIST) and by the KU-KIST program funded by the Ministry of Science, ICT and Future Planning , and partially supported by the Korea Center for Artificial Photosynthesis through the National Research Foundation of Korea (No. 2014M1A2A2070004 ). Publisher Copyright: {\textcopyright} 2018 Elsevier B.V. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.",

year = "2018",

month = oct,

day = "5",

doi = "10.1016/j.apcatb.2018.03.083",

language = "English",

volume = "233",

pages = "130--135",

journal = "Applied Catalysis B: Environmental",

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TY - JOUR

T1 - Activation of a Ni electrocatalyst through spontaneous transformation of nickel sulfide to nickel hydroxide in an oxygen evolution reaction

AU - Lee, Minoh

AU - Oh, Hyung Suk

AU - Cho, Min Kyung

AU - Ahn, Jae Pyoung

AU - Hwang, Yun Jeong

AU - Min, Byoung Koun

N1 - Funding Information: This research was supported by the program of the Korea Institute of Science and Technology (KIST) and by the KU-KIST program funded by the Ministry of Science, ICT and Future Planning , and partially supported by the Korea Center for Artificial Photosynthesis through the National Research Foundation of Korea (No. 2014M1A2A2070004 ). Publisher Copyright: © 2018 Elsevier B.V. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

PY - 2018/10/5

Y1 - 2018/10/5

N2 - Ni-sulfide compounds synthesized on Ni foam by simple thermal sulfurization are employed as electrocatalysts for water oxidation, resulting in superior activity in alkaline electrolyte media. The role of sulfur in Ni-sulfide was found to be an activator that transformed sulfide into hydroxide, which was eventually transformed into (oxy)hydroxide. The Ni-(oxy)hydroxide phase was also found to be layered and/or amorphous. This activated catalyst showed significant enhancement in water oxidation performance with a low overpotential value of 256 mV at current density of 10 mA cm−2. Our observation could offer important insight into metal-chalcogenide electrocatalyst for water oxidation.

AB - Ni-sulfide compounds synthesized on Ni foam by simple thermal sulfurization are employed as electrocatalysts for water oxidation, resulting in superior activity in alkaline electrolyte media. The role of sulfur in Ni-sulfide was found to be an activator that transformed sulfide into hydroxide, which was eventually transformed into (oxy)hydroxide. The Ni-(oxy)hydroxide phase was also found to be layered and/or amorphous. This activated catalyst showed significant enhancement in water oxidation performance with a low overpotential value of 256 mV at current density of 10 mA cm−2. Our observation could offer important insight into metal-chalcogenide electrocatalyst for water oxidation.

KW - Electrocatalyst

KW - Metal-chalcogenide

KW - Nickel hydroxide

KW - Nickel sulfide

KW - Oxygen evolution reaction

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JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

ER -

Activation of a Ni electrocatalyst through spontaneous transformation of nickel sulfide to nickel hydroxide in an oxygen evolution reaction

Abstract

Keywords

ASJC Scopus subject areas

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