Design of hierarchical, three-dimensional free-standing single-atom electrode for H2O2 production in acidic media

Jincheng Zhang; Hongbin Yang; Jiajian Gao; Shibo Xi; Weizheng Cai; Junming Zhang; Ping Cui; Bin Liu

doi:10.1002/cey2.33

Design of hierarchical, three-dimensional free-standing single-atom electrode for H₂O₂ production in acidic media

Jincheng Zhang, Hongbin Yang, Jiajian Gao, Shibo Xi, Weizheng Cai, Junming Zhang, Ping Cui, Bin Liu^*

^*Corresponding author for this work

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

73 Citations (Scopus)

27 Downloads (CityUHK Scholars)

Abstract

Electrochemical reduction of molecular O₂to hydrogen peroxide (H₂O₂) offers a promising solution for water purification and environmental remediation. Here, we design a hierarchical free‐standing single‐Co‐atom (with Co–N₄coordination) electrode for oxygen reduction reaction (ORR) via a two‐electron pathway to make H₂O₂in acidic media. The current density of the single‐Co‐atom electrode reached 51 mA/cm²at 0.1 V vs reversible hydrogen electrode, lasting for more than 10 hours of continuous operation with H₂O₂selectivity greater than 80%. Toward practical application, the single‐Co‐atom electrode was directly used to assemble an electrochemical cell to produce H₂O₂at a rate of 676 mol/kg_cat/h with a cell voltage of about 1.6 V. © 2020 The Authors. Carbon Energy published by Wenzhou University and John Wiley & Sons Australia, Ltd

Original language	English
Pages (from-to)	276-282
Journal	Carbon Energy
Volume	2
Issue number	2
Online published	21 Feb 2020
DOIs	https://doi.org/10.1002/cey2.33
Publication status	Published - Jun 2020
Externally published	Yes

Research Keywords

CoN4
free-standing
H2O2
oxygen reduction reaction
single-atom

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This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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title = "Design of hierarchical, three-dimensional free-standing single-atom electrode for H2O2 production in acidic media",

abstract = " Electrochemical reduction of molecular O2 to hydrogen peroxide (H2O2) offers a promising solution for water purification and environmental remediation. Here, we design a hierarchical free‐standing single‐Co‐atom (with Co–N4 coordination) electrode for oxygen reduction reaction (ORR) via a two‐electron pathway to make H2O2in acidic media. The current density of the single‐Co‐atom electrode reached 51 mA/cm2 at 0.1 V vs reversible hydrogen electrode, lasting for more than 10 hours of continuous operation with H2O2selectivity greater than 80%. Toward practical application, the single‐Co‐atom electrode was directly used to assemble an electrochemical cell to produce H2O2at a rate of 676 mol/kgcat/h with a cell voltage of about 1.6 V. {\textcopyright} 2020 The Authors. Carbon Energy published by Wenzhou University and John Wiley & Sons Australia, Ltd ",

keywords = "CoN4, free-standing, H2O2, oxygen reduction reaction, single-atom",

author = "Jincheng Zhang and Hongbin Yang and Jiajian Gao and Shibo Xi and Weizheng Cai and Junming Zhang and Ping Cui and Bin Liu",

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TY - JOUR

T1 - Design of hierarchical, three-dimensional free-standing single-atom electrode for H2O2 production in acidic media

AU - Zhang, Jincheng

AU - Yang, Hongbin

AU - Gao, Jiajian

AU - Xi, Shibo

AU - Cai, Weizheng

AU - Zhang, Junming

AU - Cui, Ping

AU - Liu, Bin

PY - 2020/6

Y1 - 2020/6

N2 - Electrochemical reduction of molecular O2 to hydrogen peroxide (H2O2) offers a promising solution for water purification and environmental remediation. Here, we design a hierarchical free‐standing single‐Co‐atom (with Co–N4 coordination) electrode for oxygen reduction reaction (ORR) via a two‐electron pathway to make H2O2in acidic media. The current density of the single‐Co‐atom electrode reached 51 mA/cm2 at 0.1 V vs reversible hydrogen electrode, lasting for more than 10 hours of continuous operation with H2O2selectivity greater than 80%. Toward practical application, the single‐Co‐atom electrode was directly used to assemble an electrochemical cell to produce H2O2at a rate of 676 mol/kgcat/h with a cell voltage of about 1.6 V. © 2020 The Authors. Carbon Energy published by Wenzhou University and John Wiley & Sons Australia, Ltd

AB - Electrochemical reduction of molecular O2 to hydrogen peroxide (H2O2) offers a promising solution for water purification and environmental remediation. Here, we design a hierarchical free‐standing single‐Co‐atom (with Co–N4 coordination) electrode for oxygen reduction reaction (ORR) via a two‐electron pathway to make H2O2in acidic media. The current density of the single‐Co‐atom electrode reached 51 mA/cm2 at 0.1 V vs reversible hydrogen electrode, lasting for more than 10 hours of continuous operation with H2O2selectivity greater than 80%. Toward practical application, the single‐Co‐atom electrode was directly used to assemble an electrochemical cell to produce H2O2at a rate of 676 mol/kgcat/h with a cell voltage of about 1.6 V. © 2020 The Authors. Carbon Energy published by Wenzhou University and John Wiley & Sons Australia, Ltd

KW - CoN4

KW - free-standing

KW - H2O2

KW - oxygen reduction reaction

KW - single-atom

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U2 - 10.1002/cey2.33

DO - 10.1002/cey2.33

M3 - RGC 21 - Publication in refereed journal

SN - 2637-9368

VL - 2

SP - 276

EP - 282

JO - Carbon Energy

JF - Carbon Energy

IS - 2

ER -