RuO2/FeCo2O4 as an efficient oxygen evolution reaction catalyst in alkaline medium

Jiale Li; Weigang Gu; Dajun Wu; Xuekun Hong; Shi Tao; Bin Qian; Shaohui Xu; Paul K. Chu

doi:10.1016/j.colsurfa.2024.135245

RuO₂/FeCo₂O₄ as an efficient oxygen evolution reaction catalyst in alkaline medium

Jiale Li, Weigang Gu, Dajun Wu^*, Xuekun Hong, Shi Tao^*, Bin Qian, Shaohui Xu^*, Paul K. Chu

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

6 Citations (Scopus)

Abstract

The oxygen evolution reaction (OER) is a four-electron-proton reaction requiring a large overpotential. In order to improve the electrocatalytic activity of iron-based OER electrocatalysts, the overpotential must be reduced in order to improve the efficiency and cost-effectiveness. Herein, FeCo LDH, FeCo₂O₄, RuO₂/FeCo₂O₄, and Ru/CoFe LDH are synthesized on carbon cloth (CC) by a simple hydrothermal and annealing technique. The materials are characterized systematically, and their electrocatalytic OER properties are evaluated in detail. RuO₂/FeCo₂O₄ delivers superior OER performance in 1 M KOH, such as a low onset potential 1.55 V at a current density of 10 mA/cm⁻², a Tafel slope of 85.2 mV/dec⁻¹, as well as robust stability. The Mott-Schottky analysis reveals that the built-in electric field accelerates charge transfer and enhances the catalytic activity of RuO₂/FeCo₂O₄. © 2024 Elsevier B.V.

Original language	English
Article number	135245
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	703
Issue number	Part 1
Online published	6 Sept 2024
DOIs	https://doi.org/10.1016/j.colsurfa.2024.135245
Publication status	Published - 20 Nov 2024

Funding

This work was jointly supported by the National Natural Science Foundation of China (Grant No.11705015, No.62274017), National Science Foundation of Jiangsu Educational Department (Grant No. 15KJA430001), City University of Hong Kong Strategic Research Grant (SRG) (Grant No. 7005505), and City University of Hong Kong Donation Research Grants (Grant Nos. DON-RMG 9229021 and 9220061).

Research Keywords

Electrochemistry
FeCo2O4
OER
RuO2

RGC Funding Information

RGC-funded

UN SDGs

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

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10.1016/j.colsurfa.2024.135245

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title = "RuO2/FeCo2O4 as an efficient oxygen evolution reaction catalyst in alkaline medium",

abstract = "The oxygen evolution reaction (OER) is a four-electron-proton reaction requiring a large overpotential. In order to improve the electrocatalytic activity of iron-based OER electrocatalysts, the overpotential must be reduced in order to improve the efficiency and cost-effectiveness. Herein, FeCo LDH, FeCo2O4, RuO2/FeCo2O4, and Ru/CoFe LDH are synthesized on carbon cloth (CC) by a simple hydrothermal and annealing technique. The materials are characterized systematically, and their electrocatalytic OER properties are evaluated in detail. RuO2/FeCo2O4 delivers superior OER performance in 1 M KOH, such as a low onset potential 1.55 V at a current density of 10 mA/cm−2, a Tafel slope of 85.2 mV/dec−1, as well as robust stability. The Mott-Schottky analysis reveals that the built-in electric field accelerates charge transfer and enhances the catalytic activity of RuO2/FeCo2O4. {\textcopyright} 2024 Elsevier B.V.",

keywords = "Electrochemistry, FeCo2O4, OER, RuO2",

author = "Jiale Li and Weigang Gu and Dajun Wu and Xuekun Hong and Shi Tao and Bin Qian and Shaohui Xu and Chu, {Paul K.}",

year = "2024",

month = nov,

day = "20",

doi = "10.1016/j.colsurfa.2024.135245",

language = "English",

volume = "703",

journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

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TY - JOUR

T1 - RuO2/FeCo2O4 as an efficient oxygen evolution reaction catalyst in alkaline medium

AU - Li, Jiale

AU - Gu, Weigang

AU - Wu, Dajun

AU - Hong, Xuekun

AU - Tao, Shi

AU - Qian, Bin

AU - Xu, Shaohui

AU - Chu, Paul K.

PY - 2024/11/20

Y1 - 2024/11/20

N2 - The oxygen evolution reaction (OER) is a four-electron-proton reaction requiring a large overpotential. In order to improve the electrocatalytic activity of iron-based OER electrocatalysts, the overpotential must be reduced in order to improve the efficiency and cost-effectiveness. Herein, FeCo LDH, FeCo2O4, RuO2/FeCo2O4, and Ru/CoFe LDH are synthesized on carbon cloth (CC) by a simple hydrothermal and annealing technique. The materials are characterized systematically, and their electrocatalytic OER properties are evaluated in detail. RuO2/FeCo2O4 delivers superior OER performance in 1 M KOH, such as a low onset potential 1.55 V at a current density of 10 mA/cm−2, a Tafel slope of 85.2 mV/dec−1, as well as robust stability. The Mott-Schottky analysis reveals that the built-in electric field accelerates charge transfer and enhances the catalytic activity of RuO2/FeCo2O4. © 2024 Elsevier B.V.

AB - The oxygen evolution reaction (OER) is a four-electron-proton reaction requiring a large overpotential. In order to improve the electrocatalytic activity of iron-based OER electrocatalysts, the overpotential must be reduced in order to improve the efficiency and cost-effectiveness. Herein, FeCo LDH, FeCo2O4, RuO2/FeCo2O4, and Ru/CoFe LDH are synthesized on carbon cloth (CC) by a simple hydrothermal and annealing technique. The materials are characterized systematically, and their electrocatalytic OER properties are evaluated in detail. RuO2/FeCo2O4 delivers superior OER performance in 1 M KOH, such as a low onset potential 1.55 V at a current density of 10 mA/cm−2, a Tafel slope of 85.2 mV/dec−1, as well as robust stability. The Mott-Schottky analysis reveals that the built-in electric field accelerates charge transfer and enhances the catalytic activity of RuO2/FeCo2O4. © 2024 Elsevier B.V.

KW - Electrochemistry

KW - FeCo2O4

KW - OER

KW - RuO2

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U2 - 10.1016/j.colsurfa.2024.135245

DO - 10.1016/j.colsurfa.2024.135245

M3 - RGC 21 - Publication in refereed journal

SN - 0927-7757

VL - 703

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

IS - Part 1

M1 - 135245

ER -

RuO₂/FeCo₂O₄ as an efficient oxygen evolution reaction catalyst in alkaline medium

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DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

DON: Surface Modification and Fabrication of Advanced Materials

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RuO2/FeCo2O4 as an efficient oxygen evolution reaction catalyst in alkaline medium

Abstract

Funding

Research Keywords

RGC Funding Information

UN SDGs

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Other Access Options

Permanent Link

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Projects

DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

DON: Surface Modification and Fabrication of Advanced Materials

Cite this

RuO₂/FeCo₂O₄ as an efficient oxygen evolution reaction catalyst in alkaline medium