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A Bifunctional Electrocatalyst for Oxygen Evolution and Oxygen Reduction Reactions in Water
Author(s) -
Schöfberger Wolfgang,
Faschinger Felix,
Chattopadhyay Samir,
Bhakta Snehadri,
Mondal Biswajit,
Elemans Johannes A. A. W.,
Müllegger Stefan,
Tebi Stefano,
Koch Reinhold,
Klappenberger Florian,
Paszkiewicz Mateusz,
Barth Johannes V.,
Rauls Eva,
Aldahhak Hazem,
Schmidt Wolf Gero,
Dey Abhishek
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201508404
Subject(s) - electrocatalyst , bifunctional , chemistry , oxygen , manganese , oxygen evolution , electrochemistry , catalysis , redox , photochemistry , inorganic chemistry , corrole , aqueous solution , oxygen reduction , electrode , organic chemistry
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 H 2 O 2 and O 2 − . 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.