Hollow CeO2@Co2N Nanosheets Derived from Co-ZIF-L for Boosting the Oxygen Evolution Reaction

Jian Zhang; Wenhui He; Harshitha Barike Aiyappa; Thomas Quast; Stefan Dieckhöfer; Denis Öhl; João R.C. Junqueira; Yen Ting Chen; Justus Masa; Wolfgang Schuhmann

doi:10.1002/admi.202100041

Hollow CeO₂@Co₂N Nanosheets Derived from Co-ZIF-L for Boosting the Oxygen Evolution Reaction

Jian Zhang, Wenhui He, Harshitha Barike Aiyappa, Thomas Quast, Stefan Dieckhöfer, Denis Öhl, João R.C. Junqueira, Yen Ting Chen, Justus Masa, Wolfgang Schuhmann

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

40 Scopus citations

Abstract

Rational design of highly active electrocatalysts for the oxygen evolution reaction (OER) is critical to improving overall electrochemical water splitting efficiency. This study suggests hollow CeO₂@Co₂N nanosheets synthesized using Co-ZIF-L as a precursor, followed by a hydrothermal reaction and a nitridation process as very attractive OER catalysts. The increased activity is supposed to be due to nitridation and strong electronic interaction between CeO₂ and Co₂N that contribute to the formation of active CoOOH phase. The synthesized CeO₂@Co₂N exhibits low overpotentials of 219 and 345 mV at OER current densities of 10 and 100 mA cm^–2, respectively, as well as a long-term durability of 30 h at a comparatively high current density of 100 mA cm⁻².

Original language	English
Article number	2100041
Journal	Advanced Materials Interfaces
Volume	8
Issue number	9
DOIs	https://doi.org/10.1002/admi.202100041
State	Published - 1 May 2021
Externally published	Yes

Keywords

cerium oxides
cobalt nitride
electronic interactions
hollow nanosheets
non-noble-metal electrocatalysts
oxygen evolution reaction

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering

Access to Document

10.1002/admi.202100041

Cite this

@article{31eb11159fc7476ab5342c765425a3d4,

title = "Hollow CeO2@Co2N Nanosheets Derived from Co-ZIF-L for Boosting the Oxygen Evolution Reaction",

abstract = "Rational design of highly active electrocatalysts for the oxygen evolution reaction (OER) is critical to improving overall electrochemical water splitting efficiency. This study suggests hollow CeO2@Co2N nanosheets synthesized using Co-ZIF-L as a precursor, followed by a hydrothermal reaction and a nitridation process as very attractive OER catalysts. The increased activity is supposed to be due to nitridation and strong electronic interaction between CeO2 and Co2N that contribute to the formation of active CoOOH phase. The synthesized CeO2@Co2N exhibits low overpotentials of 219 and 345 mV at OER current densities of 10 and 100 mA cm–2, respectively, as well as a long-term durability of 30 h at a comparatively high current density of 100 mA cm−2.",

keywords = "cerium oxides, cobalt nitride, electronic interactions, hollow nanosheets, non-noble-metal electrocatalysts, oxygen evolution reaction",

author = "Jian Zhang and Wenhui He and Aiyappa, {Harshitha Barike} and Thomas Quast and Stefan Dieckh{\"o}fer and Denis {\"O}hl and Junqueira, {Jo{\~a}o R.C.} and Chen, {Yen Ting} and Justus Masa and Wolfgang Schuhmann",

note = "Publisher Copyright: {\textcopyright} 2021 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH",

year = "2021",

month = may,

day = "1",

doi = "10.1002/admi.202100041",

language = "English",

volume = "8",

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TY - JOUR

T1 - Hollow CeO2@Co2N Nanosheets Derived from Co-ZIF-L for Boosting the Oxygen Evolution Reaction

AU - Zhang, Jian

AU - He, Wenhui

AU - Aiyappa, Harshitha Barike

AU - Quast, Thomas

AU - Dieckhöfer, Stefan

AU - Öhl, Denis

AU - Junqueira, João R.C.

AU - Chen, Yen Ting

AU - Masa, Justus

AU - Schuhmann, Wolfgang

PY - 2021/5/1

Y1 - 2021/5/1

N2 - Rational design of highly active electrocatalysts for the oxygen evolution reaction (OER) is critical to improving overall electrochemical water splitting efficiency. This study suggests hollow CeO2@Co2N nanosheets synthesized using Co-ZIF-L as a precursor, followed by a hydrothermal reaction and a nitridation process as very attractive OER catalysts. The increased activity is supposed to be due to nitridation and strong electronic interaction between CeO2 and Co2N that contribute to the formation of active CoOOH phase. The synthesized CeO2@Co2N exhibits low overpotentials of 219 and 345 mV at OER current densities of 10 and 100 mA cm–2, respectively, as well as a long-term durability of 30 h at a comparatively high current density of 100 mA cm−2.

AB - Rational design of highly active electrocatalysts for the oxygen evolution reaction (OER) is critical to improving overall electrochemical water splitting efficiency. This study suggests hollow CeO2@Co2N nanosheets synthesized using Co-ZIF-L as a precursor, followed by a hydrothermal reaction and a nitridation process as very attractive OER catalysts. The increased activity is supposed to be due to nitridation and strong electronic interaction between CeO2 and Co2N that contribute to the formation of active CoOOH phase. The synthesized CeO2@Co2N exhibits low overpotentials of 219 and 345 mV at OER current densities of 10 and 100 mA cm–2, respectively, as well as a long-term durability of 30 h at a comparatively high current density of 100 mA cm−2.

KW - cerium oxides

KW - cobalt nitride

KW - electronic interactions

KW - hollow nanosheets

KW - non-noble-metal electrocatalysts

KW - oxygen evolution reaction

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DO - 10.1002/admi.202100041

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