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 journalArticlepeer-review

36 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 languageEnglish
Article number2100041
JournalAdvanced Materials Interfaces
Volume8
Issue number9
DOIs
StatePublished - 1 May 2021
Externally publishedYes

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

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