A bifunctional electrocatalyst for oxygen evolution and oxygen reduction reactions in water

Wolfgang Schöfberger, Felix Faschinger, Samir Chattopadhyay, Snehadri Bhakta, Biswajit Mondal, Johannes A.A.W. Elemans, Stefan Müllegger, Stefano Tebi, Reinhold Koch, Florian Klappenberger, Mateusz Paszkiewicz, Johannes V. Barth, Eva Rauls, Hazem Aldahhak, Wolf Gero Schmidt, Abhishek Dey

Research output: Contribution to journalArticlepeer-review

103 Scopus citations

Abstract

Oxygen reduction and water oxidation are two key processes in fuel cell applications. The oxidation of water to dioxygen is a 4 H+/4 e- process, while oxygen can be fully reduced to water by a 4 e-/4 H+ process or partially reduced by fewer electrons to reactive oxygen species such as H2O2 and O2-. We demonstrate that a novel manganese corrole complex behaves as a bifunctional catalyst for both the electrocatalytic generation of dioxygen as well as the reduction of dioxygen in aqueous media. Furthermore, our combined kinetic, spectroscopic, and electrochemical study of manganese corroles adsorbed on different electrode materials (down to a submolecular level) reveals mechanistic details of the oxygen evolution and reduction processes.

Original languageEnglish
Pages (from-to)2350-2355
Number of pages6
JournalAngewandte Chemie - International Edition
Volume55
Issue number7
DOIs
StatePublished - 12 Feb 2016
Externally publishedYes

Keywords

  • corroles
  • electrochemistry
  • manganese
  • oxygen evolution
  • oxygen reduction

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (all)

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