Enhancing Electrocatalytic Performance of Bifunctional Cobalt–Manganese-Oxynitride Nanocatalysts on Graphene

Yang Li, Kurian A. Kuttiyiel, Lijun Wu, Yimei Zhu, Etsuko Fujita, Radoslav R. Adzic, Kotaro Sasaki

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We report the synthesis and characterization of graphenesupported cobalt–manganese-oxynitride nanocatalysts (CoMnON/G) as bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). A nitriding treatment of spinel compound CoMnO increased the ORR activity considerably, and the most active material catalyzed the ORR with only a 30 mV half-wave potential difference from the commercial carbon-supported platinum (Pt/C) in alkaline media. In addition to high activity, the catalyst also exhibited an intrinsic stability that outperformed Pt/C. An appropriately designed nitridation thus facilitates new directions for developing active and durable non-precious-metal oxynitride electocatalysts.

Original languageEnglish
Pages (from-to)68-73
Number of pages6
JournalChemSusChem
Volume10
Issue number1
DOIs
Publication statusPublished - Jan 1 2017

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Keywords

  • nitriding
  • oxygen evolution
  • oxygen reduction
  • oxynitride
  • spinel

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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