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EPR Evidence for Co(IV) Species Produced During Water Oxidation at Neutral pH

Open access
McAlpin, J. Gregory, Surendranath, Yogesh, Dincǎ, Mircea, Stich, Troy A., Stoian, Sebastian A., Casey, William H., Nocera, Daniel G., Britt, R. David·2010·Journal of the American Chemical Society

Abstract

Thin-film water oxidation catalysts (Co-Pi) prepared by electrodeposition from phosphate electrolyte and Co(NO(3))(2) have been characterized by electron paramagnetic resonance (EPR) spectroscopy. Co-Pi catalyst films exhibit EPR signals corresponding to populations of both Co(II) and Co(IV). As the deposition voltage is increased into the region where water oxidation prevails, the population of Co(IV) rises and the population of Co(II) decreases. The changes in the redox speciation of the film can also be induced, in part, by prolonged water oxidation catalysis in the absence of additional catalyst deposition. These results provide spectroscopic evidence for the formation of Co(IV) species during water oxidation catalysis at neutral pH.

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Metadata

Authors
McAlpin, J. G., Surendranath, Y., Dincǎ, M., Stich, T. A., Stoian, S. A., Casey, W. H., Nocera, D. G., & Britt, R. D.
Venue
Journal of the American Chemical Society
Published
2010-04-30
Volume
132
Issue
20
Pages
6882-6883
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2043396906
Cited by
545
References
0
FWCI
13.94
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: EPR Evidence for Co(IV) Species Produced During Water Oxidation at Neutral pH. https://app.cochat.ai/papers/10.1021/ja1013344
The paper
McAlpin, J. G., Surendranath, Y., Dincǎ, M., Stich, T. A., Stoian, S. A., Casey, W. H., Nocera, D. G., & Britt, R. D. (2010). EPR Evidence for Co(IV) Species Produced During Water Oxidation at Neutral pH. Journal of the American Chemical Society. https://doi.org/10.1021/ja1013344

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