Adaptive Bifunctional Electrocatalyst of Amorphous CoFe Oxide @ 2D Black Phosphorus for Overall Water Splitting

Xingyun Li; Liangping Xiao; Ling Zhou; Qingchi Xu; Jian Weng; Jun Xu; Bin Liu

doi:10.1002/anie.202008514

Adaptive Bifunctional Electrocatalyst of Amorphous CoFe Oxide @ 2D Black Phosphorus for Overall Water Splitting

Xingyun Li, Liangping Xiao, Ling Zhou, Qingchi Xu, Jian Weng, Jun Xu^*, Bin Liu^*

^*Corresponding author for this work

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

244 Citations (Scopus)

Abstract

Water electrolysis offers a promising green technology to tackle the global energy and environmental crisis, but its efficiency is greatly limited by the sluggish reaction kinetics of both the cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER). In this work, by growing amorphous multi-transition-metal (cobalt and iron) oxide on two-dimensional (2D) black phosphorus (BP), we develop a bifunctional electrocatalyst (CoFeO@BP), which is able to efficiently catalyze both HER and OER. The overpotentials for the hybrid CoFeO@BP catalyst to reach a current density of 10 mA cm⁻² in 1 m KOH are 88 and 266 mV for HER and OER, respectively. Based on a series of ex-situ and in situ investigations, the excellent catalytic performance of CoFeO@BP is found to result from the adaptive surface structure under reduction and oxidation potentials. CoFeO@BP can be transformed to CoFe phosphide under reduction potential, in situ generating the real active catalyst for HER. © 2020 Wiley-VCH GmbH

Original language	English
Pages (from-to)	21106-21113
Journal	Angewandte Chemie - International Edition
Volume	59
Issue number	47
Online published	6 Aug 2020
DOIs	https://doi.org/10.1002/anie.202008514
Publication status	Published - 16 Nov 2020
Externally published	Yes

Funding

This study is financially supported by the National Nature Science Foundation of China (21771154), the Natural Science Foundation of Fujian Province of China (2018J01019 and 2018J05025), the Shenzhen Fundamental Research Programs (JCYJ20190809161013453), the Fundamental Research Funds for the Central Universities (20720180019 and 20720180016), the XMU Training Program of Innovation and Entrepreneurship for Undergraduates (2019Y1690), the Singapore Ministry of Education Academic Research Fund (AcRF) Tier 1: RG115/17 and RG115/18, and Tier 2: MOE2016-T2-2–004, and Singapore Energy Center (SgEC) SgEC-Core2019-15.

Research Keywords

amorphous
bifunctional catalyst
black phosphorus
in situ transformation
water electrolysis

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

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abstract = "Water electrolysis offers a promising green technology to tackle the global energy and environmental crisis, but its efficiency is greatly limited by the sluggish reaction kinetics of both the cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER). In this work, by growing amorphous multi-transition-metal (cobalt and iron) oxide on two-dimensional (2D) black phosphorus (BP), we develop a bifunctional electrocatalyst (CoFeO@BP), which is able to efficiently catalyze both HER and OER. The overpotentials for the hybrid CoFeO@BP catalyst to reach a current density of 10 mA cm−2 in 1 m KOH are 88 and 266 mV for HER and OER, respectively. Based on a series of ex-situ and in situ investigations, the excellent catalytic performance of CoFeO@BP is found to result from the adaptive surface structure under reduction and oxidation potentials. CoFeO@BP can be transformed to CoFe phosphide under reduction potential, in situ generating the real active catalyst for HER. {\textcopyright} 2020 Wiley-VCH GmbH",

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author = "Xingyun Li and Liangping Xiao and Ling Zhou and Qingchi Xu and Jian Weng and Jun Xu and Bin Liu",

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doi = "10.1002/anie.202008514",

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TY - JOUR

T1 - Adaptive Bifunctional Electrocatalyst of Amorphous CoFe Oxide @ 2D Black Phosphorus for Overall Water Splitting

AU - Li, Xingyun

AU - Xiao, Liangping

AU - Zhou, Ling

AU - Xu, Qingchi

AU - Weng, Jian

AU - Xu, Jun

AU - Liu, Bin

PY - 2020/11/16

Y1 - 2020/11/16

N2 - Water electrolysis offers a promising green technology to tackle the global energy and environmental crisis, but its efficiency is greatly limited by the sluggish reaction kinetics of both the cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER). In this work, by growing amorphous multi-transition-metal (cobalt and iron) oxide on two-dimensional (2D) black phosphorus (BP), we develop a bifunctional electrocatalyst (CoFeO@BP), which is able to efficiently catalyze both HER and OER. The overpotentials for the hybrid CoFeO@BP catalyst to reach a current density of 10 mA cm−2 in 1 m KOH are 88 and 266 mV for HER and OER, respectively. Based on a series of ex-situ and in situ investigations, the excellent catalytic performance of CoFeO@BP is found to result from the adaptive surface structure under reduction and oxidation potentials. CoFeO@BP can be transformed to CoFe phosphide under reduction potential, in situ generating the real active catalyst for HER. © 2020 Wiley-VCH GmbH

AB - Water electrolysis offers a promising green technology to tackle the global energy and environmental crisis, but its efficiency is greatly limited by the sluggish reaction kinetics of both the cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER). In this work, by growing amorphous multi-transition-metal (cobalt and iron) oxide on two-dimensional (2D) black phosphorus (BP), we develop a bifunctional electrocatalyst (CoFeO@BP), which is able to efficiently catalyze both HER and OER. The overpotentials for the hybrid CoFeO@BP catalyst to reach a current density of 10 mA cm−2 in 1 m KOH are 88 and 266 mV for HER and OER, respectively. Based on a series of ex-situ and in situ investigations, the excellent catalytic performance of CoFeO@BP is found to result from the adaptive surface structure under reduction and oxidation potentials. CoFeO@BP can be transformed to CoFe phosphide under reduction potential, in situ generating the real active catalyst for HER. © 2020 Wiley-VCH GmbH

KW - amorphous

KW - bifunctional catalyst

KW - black phosphorus

KW - in situ transformation

KW - water electrolysis

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M3 - RGC 21 - Publication in refereed journal

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JO - Angewandte Chemie - International Edition

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Adaptive Bifunctional Electrocatalyst of Amorphous CoFe Oxide @ 2D Black Phosphorus for Overall Water Splitting

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