Anti–corrosive FeO decorated CuCo2S4 as an efficient and durable electrocatalyst for hydrogen evolution reaction

Abu Talha Aqueel Ahmed; Abu Saad Ansari; S. M. Pawar; Bonggeun Shong; Hyungsang Kim; Hyunsik Im

doi:10.1016/j.apsusc.2020.148229

Anti–corrosive FeO decorated CuCo₂S₄ as an efficient and durable electrocatalyst for hydrogen evolution reaction

Abu Talha Aqueel Ahmed, Abu Saad Ansari, S. M. Pawar, Bonggeun Shong, Hyungsang Kim, Hyunsik Im

Division of System Semiconductor

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49 Scopus citations

Abstract

An anti-corrosive FeO@CuCo₂S₄ electrocatalyst, with highly-active catalytic sites, is fabricated using a mild hydrothermal and magnetron sputtering growth technique. FeO@CuCo₂S₄ shows excellent hydrogen evolution reaction (HER) in an alkaline KOH electrolyte with a low overpotential of 107 mV at 10 mA/cm² and a small Tafel slope of 136 mV/dec. Moreover, long-term stability tests at various current densities, up to 100 mA/cm², demonstrate its excellent sustainability. The excellent HER catalytic performance and stability are attributed to the synergy between FeO and CCS elucidated by density functional theory, which is aroused from electrocatalytically activated surface, anti-corrosive surface, and the improved electronic conductivity.

Original language	English
Article number	148229
Journal	Applied Surface Science
Volume	539
DOIs	https://doi.org/10.1016/j.apsusc.2020.148229
State	Published - 15 Feb 2021

Keywords

Anti-corrosive coating
Catalytically active sites
FeO@CuCoS
Hydrogen evolution reaction
Hydrothermal growth

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10.1016/j.apsusc.2020.148229

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title = "Anti–corrosive FeO decorated CuCo2S4 as an efficient and durable electrocatalyst for hydrogen evolution reaction",

abstract = "An anti-corrosive FeO@CuCo2S4 electrocatalyst, with highly-active catalytic sites, is fabricated using a mild hydrothermal and magnetron sputtering growth technique. FeO@CuCo2S4 shows excellent hydrogen evolution reaction (HER) in an alkaline KOH electrolyte with a low overpotential of 107 mV at 10 mA/cm2 and a small Tafel slope of 136 mV/dec. Moreover, long-term stability tests at various current densities, up to 100 mA/cm2, demonstrate its excellent sustainability. The excellent HER catalytic performance and stability are attributed to the synergy between FeO and CCS elucidated by density functional theory, which is aroused from electrocatalytically activated surface, anti-corrosive surface, and the improved electronic conductivity.",

keywords = "Anti-corrosive coating, Catalytically active sites, FeO@CuCoS, Hydrogen evolution reaction, Hydrothermal growth",

author = "Ahmed, {Abu Talha Aqueel} and Ansari, {Abu Saad} and Pawar, {S. M.} and Bonggeun Shong and Hyungsang Kim and Hyunsik Im",

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doi = "10.1016/j.apsusc.2020.148229",

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T1 - Anti–corrosive FeO decorated CuCo2S4 as an efficient and durable electrocatalyst for hydrogen evolution reaction

AU - Ahmed, Abu Talha Aqueel

AU - Ansari, Abu Saad

AU - Pawar, S. M.

AU - Shong, Bonggeun

AU - Kim, Hyungsang

AU - Im, Hyunsik

PY - 2021/2/15

Y1 - 2021/2/15

N2 - An anti-corrosive FeO@CuCo2S4 electrocatalyst, with highly-active catalytic sites, is fabricated using a mild hydrothermal and magnetron sputtering growth technique. FeO@CuCo2S4 shows excellent hydrogen evolution reaction (HER) in an alkaline KOH electrolyte with a low overpotential of 107 mV at 10 mA/cm2 and a small Tafel slope of 136 mV/dec. Moreover, long-term stability tests at various current densities, up to 100 mA/cm2, demonstrate its excellent sustainability. The excellent HER catalytic performance and stability are attributed to the synergy between FeO and CCS elucidated by density functional theory, which is aroused from electrocatalytically activated surface, anti-corrosive surface, and the improved electronic conductivity.

AB - An anti-corrosive FeO@CuCo2S4 electrocatalyst, with highly-active catalytic sites, is fabricated using a mild hydrothermal and magnetron sputtering growth technique. FeO@CuCo2S4 shows excellent hydrogen evolution reaction (HER) in an alkaline KOH electrolyte with a low overpotential of 107 mV at 10 mA/cm2 and a small Tafel slope of 136 mV/dec. Moreover, long-term stability tests at various current densities, up to 100 mA/cm2, demonstrate its excellent sustainability. The excellent HER catalytic performance and stability are attributed to the synergy between FeO and CCS elucidated by density functional theory, which is aroused from electrocatalytically activated surface, anti-corrosive surface, and the improved electronic conductivity.

KW - Anti-corrosive coating

KW - Catalytically active sites

KW - FeO@CuCoS

KW - Hydrogen evolution reaction

KW - Hydrothermal growth

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JO - Applied Surface Science

JF - Applied Surface Science

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ER -

Anti–corrosive FeO decorated CuCo₂S₄ as an efficient and durable electrocatalyst for hydrogen evolution reaction

Abstract

Keywords

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