Low-overpotential overall water splitting by a cooperative interface of cobalt-iron hydroxide and iron oxyhydroxide

Pravin Babar; Komal Patil; Javeed Mahmood; Seok jin Kim; Jin Hyeok Kim; Cafer T. Yavuz

doi:10.1016/j.xcrp.2022.100762

Low-overpotential overall water splitting by a cooperative interface of cobalt-iron hydroxide and iron oxyhydroxide

Pravin Babar, Komal Patil, Javeed Mahmood, Seok jin Kim, Jin Hyeok Kim^*, Cafer T. Yavuz^*

^*Corresponding author for this work

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

71 Scopus citations

Abstract

Interface engineering is a powerful strategy for modulating electronic structure and enhancing intrinsic activity of electrocatalysts for water splitting. Here, we grow two-dimensional cobalt-iron hydroxide (CoFe-OH) nanosheets on nickel foam substrates and deposit FeOOH nanoparticles in a rapid and scalable wet chemical approach. The CoFe-OH@FeOOH nanocomposite features abundant active sites and high surface area, allowing fast kinetics for electrochemical water splitting. The electrode has a low overpotential value of 200 mV at 50 mA cm⁻² for oxygen evolution. When used as both anode and cathode for overall water splitting, CoFe-OH@FeOOH provides a low cell voltage of 1.56 V to deliver 10 mA cm⁻² current density. The synergistic activity is presumed to be from the seamless interface of CoFe-OH and FeOOH, improving conductivity and mass transfer. We envision that this simple approach may offer a new direction for designing efficient electrodes for energy conversion applications.

Original language	English (US)
Article number	100762
Journal	Cell Reports Physical Science
Volume	3
Issue number	2
DOIs	https://doi.org/10.1016/j.xcrp.2022.100762
State	Published - Feb 16 2022

Bibliographical note

Funding Information:
This research was supported by the King Abdullah University of Science and Technology , Kingdom of Saudi Arabia, and by a Human Resources Development Program ( 20194030202470 ) of the Korea Institute of Energy Technology, Evaluation, and Planning (KETEP) grant funded by the Korean Government Ministry of Trade , Industry, and Energy, Republic of Korea.

Funding Information:
This research was supported by the King Abdullah University of Science and Technology, Kingdom of Saudi Arabia, and by a Human Resources Development Program (20194030202470) of the Korea Institute of Energy Technology, Evaluation, and Planning (KETEP) grant funded by the Korean Government Ministry of Trade, Industry, and Energy, Republic of Korea. P.B. J.H.K. and C.T.Y. conceived and designed the idea. P.B. carried out the experiments and wrote the manuscript. K.P. provided assistance with the XRD and XPS characterizations. S.K. and J.M. participated in data analyses and discussions. All authors reviewed and contributed to this paper. C.T.Y. is an advisory board member at Cell Reports Physical Science. The authors declare no other competing interests.

Publisher Copyright:
© 2022 The Authors

Keywords

electrocatalysis
HER
interface engineering
OER
renewable energy
sustainable hydrogen generation

ASJC Scopus subject areas

General Chemistry
General Materials Science
General Engineering
General Energy
General Physics and Astronomy

UN SDGs

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

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10.1016/j.xcrp.2022.100762

Cite this

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title = "Low-overpotential overall water splitting by a cooperative interface of cobalt-iron hydroxide and iron oxyhydroxide",

abstract = "Interface engineering is a powerful strategy for modulating electronic structure and enhancing intrinsic activity of electrocatalysts for water splitting. Here, we grow two-dimensional cobalt-iron hydroxide (CoFe-OH) nanosheets on nickel foam substrates and deposit FeOOH nanoparticles in a rapid and scalable wet chemical approach. The CoFe-OH@FeOOH nanocomposite features abundant active sites and high surface area, allowing fast kinetics for electrochemical water splitting. The electrode has a low overpotential value of 200 mV at 50 mA cm−2 for oxygen evolution. When used as both anode and cathode for overall water splitting, CoFe-OH@FeOOH provides a low cell voltage of 1.56 V to deliver 10 mA cm−2 current density. The synergistic activity is presumed to be from the seamless interface of CoFe-OH and FeOOH, improving conductivity and mass transfer. We envision that this simple approach may offer a new direction for designing efficient electrodes for energy conversion applications.",

keywords = "electrocatalysis, HER, interface engineering, OER, renewable energy, sustainable hydrogen generation",

author = "Pravin Babar and Komal Patil and Javeed Mahmood and Kim, {Seok jin} and Kim, {Jin Hyeok} and Yavuz, {Cafer T.}",

note = "Funding Information: This research was supported by the King Abdullah University of Science and Technology , Kingdom of Saudi Arabia, and by a Human Resources Development Program ( 20194030202470 ) of the Korea Institute of Energy Technology, Evaluation, and Planning (KETEP) grant funded by the Korean Government Ministry of Trade , Industry, and Energy, Republic of Korea. Funding Information: This research was supported by the King Abdullah University of Science and Technology, Kingdom of Saudi Arabia, and by a Human Resources Development Program (20194030202470) of the Korea Institute of Energy Technology, Evaluation, and Planning (KETEP) grant funded by the Korean Government Ministry of Trade, Industry, and Energy, Republic of Korea. P.B. J.H.K. and C.T.Y. conceived and designed the idea. P.B. carried out the experiments and wrote the manuscript. K.P. provided assistance with the XRD and XPS characterizations. S.K. and J.M. participated in data analyses and discussions. All authors reviewed and contributed to this paper. C.T.Y. is an advisory board member at Cell Reports Physical Science. The authors declare no other competing interests. Publisher Copyright: {\textcopyright} 2022 The Authors",

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AU - Patil, Komal

AU - Mahmood, Javeed

AU - Kim, Seok jin

AU - Kim, Jin Hyeok

AU - Yavuz, Cafer T.

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N2 - Interface engineering is a powerful strategy for modulating electronic structure and enhancing intrinsic activity of electrocatalysts for water splitting. Here, we grow two-dimensional cobalt-iron hydroxide (CoFe-OH) nanosheets on nickel foam substrates and deposit FeOOH nanoparticles in a rapid and scalable wet chemical approach. The CoFe-OH@FeOOH nanocomposite features abundant active sites and high surface area, allowing fast kinetics for electrochemical water splitting. The electrode has a low overpotential value of 200 mV at 50 mA cm−2 for oxygen evolution. When used as both anode and cathode for overall water splitting, CoFe-OH@FeOOH provides a low cell voltage of 1.56 V to deliver 10 mA cm−2 current density. The synergistic activity is presumed to be from the seamless interface of CoFe-OH and FeOOH, improving conductivity and mass transfer. We envision that this simple approach may offer a new direction for designing efficient electrodes for energy conversion applications.

AB - Interface engineering is a powerful strategy for modulating electronic structure and enhancing intrinsic activity of electrocatalysts for water splitting. Here, we grow two-dimensional cobalt-iron hydroxide (CoFe-OH) nanosheets on nickel foam substrates and deposit FeOOH nanoparticles in a rapid and scalable wet chemical approach. The CoFe-OH@FeOOH nanocomposite features abundant active sites and high surface area, allowing fast kinetics for electrochemical water splitting. The electrode has a low overpotential value of 200 mV at 50 mA cm−2 for oxygen evolution. When used as both anode and cathode for overall water splitting, CoFe-OH@FeOOH provides a low cell voltage of 1.56 V to deliver 10 mA cm−2 current density. The synergistic activity is presumed to be from the seamless interface of CoFe-OH and FeOOH, improving conductivity and mass transfer. We envision that this simple approach may offer a new direction for designing efficient electrodes for energy conversion applications.

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KW - HER

KW - interface engineering

KW - OER

KW - renewable energy

KW - sustainable hydrogen generation

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U2 - 10.1016/j.xcrp.2022.100762

DO - 10.1016/j.xcrp.2022.100762

M3 - Article

AN - SCOPUS:85124596796

SN - 2666-3864

VL - 3

JO - Cell Reports Physical Science

JF - Cell Reports Physical Science

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M1 - 100762

ER -

Low-overpotential overall water splitting by a cooperative interface of cobalt-iron hydroxide and iron oxyhydroxide

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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