Nano-Micro-Structured Nickel-Cobalt Hydroxide/Ni2P2O7 Assembly on Nickel Foam: An Outstanding Electrocatalyst for Alkaline Oxygen Evolution Reaction

Nilesh R. Chodankar; Indrajit V. Bagal; Sang Wan Ryu; Young Kyu Han; Do Heyoung Kim

doi:10.1002/cctc.201900865

Nano-Micro-Structured Nickel-Cobalt Hydroxide/Ni₂P₂O₇ Assembly on Nickel Foam: An Outstanding Electrocatalyst for Alkaline Oxygen Evolution Reaction

Nilesh R. Chodankar, Indrajit V. Bagal, Sang Wan Ryu, Young Kyu Han, Do Heyoung Kim

Department of Energy and Materials Engineering

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

18 Scopus citations

Abstract

The design and development of materials for the efficient electrochemical evolution of oxygen from hydroxyl ions in alkaline media is of prime importance for reducing energy losses in water-alkaline electrolytes. In this Communication, we report non-noble nano-micro-structured Ni₂P₂O₇ microsheets decorated with nickel-cobalt hydroxide (Ni−Co-hydroxide) nanoflakes for the efficient oxygen evolution reaction (OER). Remarkably, the nano-micro-assembled Ni−Co-hydroxide/Ni₂P₂O₇ structured electrode exhibits superior catalytic activity towards the OER with a relatively low overpotential of 197 mV at a current density of 10 mA/cm² in 1.0 M KOH, coupled with excellent long-term stability (12 h). The outstanding OER activity resulted from the nano-micro structure of the prepared electrode with excellent redox activity in an alkaline electrolyte.

Original language	English
Pages (from-to)	4256-4261
Number of pages	6
Journal	ChemCatChem
Volume	11
Issue number	17
DOIs	https://doi.org/10.1002/cctc.201900865
State	Published - 5 Sep 2019

Keywords

Electrocatalyst
NiPO
Ni−Co-hydroxide
Overpotential
Oxygen evolution reaction

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title = "Nano-Micro-Structured Nickel-Cobalt Hydroxide/Ni2P2O7 Assembly on Nickel Foam: An Outstanding Electrocatalyst for Alkaline Oxygen Evolution Reaction",

abstract = "The design and development of materials for the efficient electrochemical evolution of oxygen from hydroxyl ions in alkaline media is of prime importance for reducing energy losses in water-alkaline electrolytes. In this Communication, we report non-noble nano-micro-structured Ni2P2O7 microsheets decorated with nickel-cobalt hydroxide (Ni−Co-hydroxide) nanoflakes for the efficient oxygen evolution reaction (OER). Remarkably, the nano-micro-assembled Ni−Co-hydroxide/Ni2P2O7 structured electrode exhibits superior catalytic activity towards the OER with a relatively low overpotential of 197 mV at a current density of 10 mA/cm2 in 1.0 M KOH, coupled with excellent long-term stability (12 h). The outstanding OER activity resulted from the nano-micro structure of the prepared electrode with excellent redox activity in an alkaline electrolyte.",

keywords = "Electrocatalyst, NiPO, Ni−Co-hydroxide, Overpotential, Oxygen evolution reaction",

author = "Chodankar, {Nilesh R.} and Bagal, {Indrajit V.} and Ryu, {Sang Wan} and Han, {Young Kyu} and Kim, {Do Heyoung}",

note = "Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2019",

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T2 - An Outstanding Electrocatalyst for Alkaline Oxygen Evolution Reaction

AU - Chodankar, Nilesh R.

AU - Bagal, Indrajit V.

AU - Ryu, Sang Wan

AU - Han, Young Kyu

AU - Kim, Do Heyoung

PY - 2019/9/5

Y1 - 2019/9/5

N2 - The design and development of materials for the efficient electrochemical evolution of oxygen from hydroxyl ions in alkaline media is of prime importance for reducing energy losses in water-alkaline electrolytes. In this Communication, we report non-noble nano-micro-structured Ni2P2O7 microsheets decorated with nickel-cobalt hydroxide (Ni−Co-hydroxide) nanoflakes for the efficient oxygen evolution reaction (OER). Remarkably, the nano-micro-assembled Ni−Co-hydroxide/Ni2P2O7 structured electrode exhibits superior catalytic activity towards the OER with a relatively low overpotential of 197 mV at a current density of 10 mA/cm2 in 1.0 M KOH, coupled with excellent long-term stability (12 h). The outstanding OER activity resulted from the nano-micro structure of the prepared electrode with excellent redox activity in an alkaline electrolyte.

AB - The design and development of materials for the efficient electrochemical evolution of oxygen from hydroxyl ions in alkaline media is of prime importance for reducing energy losses in water-alkaline electrolytes. In this Communication, we report non-noble nano-micro-structured Ni2P2O7 microsheets decorated with nickel-cobalt hydroxide (Ni−Co-hydroxide) nanoflakes for the efficient oxygen evolution reaction (OER). Remarkably, the nano-micro-assembled Ni−Co-hydroxide/Ni2P2O7 structured electrode exhibits superior catalytic activity towards the OER with a relatively low overpotential of 197 mV at a current density of 10 mA/cm2 in 1.0 M KOH, coupled with excellent long-term stability (12 h). The outstanding OER activity resulted from the nano-micro structure of the prepared electrode with excellent redox activity in an alkaline electrolyte.

KW - Electrocatalyst

KW - NiPO

KW - Ni−Co-hydroxide

KW - Overpotential

KW - Oxygen evolution reaction

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ER -

Nano-Micro-Structured Nickel-Cobalt Hydroxide/Ni₂P₂O₇ Assembly on Nickel Foam: An Outstanding Electrocatalyst for Alkaline Oxygen Evolution Reaction

Abstract

Keywords

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