Multiple selectivity-determining mechanisms of H2O2 formation in iron porphyrin-catalysed oxygen reduction

Anna C. Brezny; Hannah S. Nedzbala; James M. Mayer

doi:10.1039/D0CC06701F

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Multiple selectivity-determining mechanisms of H₂O₂ formation in iron porphyrin-catalysed oxygen reduction†

Anna C. Brezny,

‡^ab Hannah S. Nedzbala ‡^a and James M. Mayer

*^a

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* Corresponding authors

^a Department of Chemistry, Yale University, New Haven, CT 06520, USA
E-mail: james.mayer@yale.edu

^b Department of Chemistry, Skidmore College, Saratoga Springs, NY 12866, USA

Abstract

Multiple H₂O₂-forming mechanisms are accessible in Fe(porphyrin)-catalysed oxygen reduction, a key reaction in both fuel cell technologies and oxygen-utilizing enzymes. Our kinetic analysis reveals that the porphyrin secondary structure dictates the pathway for H₂O₂ formation. This approach is generalizable to other electrocatalytic processes and provides insight into the selectivity-determining steps.

This article is part of the themed collection: Bioinspired metal complexes for chemical transformations and catalysis

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Article information

DOI: https://doi.org/10.1039/D0CC06701F
Article type: Communication
Submitted: 07 Oct 2020
Accepted: 04 Jan 2021
First published: 07 Jan 2021

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Chem. Commun., 2021,57, 1202-1205

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Multiple selectivity-determining mechanisms of H₂O₂ formation in iron porphyrin-catalysed oxygen reduction

A. C. Brezny, H. S. Nedzbala and J. M. Mayer, Chem. Commun., 2021, 57, 1202 DOI: 10.1039/D0CC06701F

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Chemical Communications