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  In Situ X-ray Spectroscopy of the Electrochemical Development of Iridium Nanoparticles in Confined Electrolyte

Frevel, L., Mom, R., Velasco Vélez, J., Plodinec, M., Knop-Gericke, A., Schlögl, R., et al. (2019). In Situ X-ray Spectroscopy of the Electrochemical Development of Iridium Nanoparticles in Confined Electrolyte. The Journal of Physical Chemistry C, 123(14), 9146-9152. doi:10.1021/acs.jpcc.9b00731.

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 Creators:
Frevel, Lorenz1, Author           
Mom, Rik1, Author           
Velasco Vélez, Juan1, Author           
Plodinec, Milivoj1, 2, Author           
Knop-Gericke, Axel1, Author           
Schlögl, Robert1, Author           
Jones, Travis1, Author           
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Rudjer Boskovic Institute, Bijenička cesta 54, 10000 Zagreb, Croatia, ou_persistent22              

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 Abstract: Iridium oxide-based catalysts are uniquely active and stable in the oxygen evolution reaction. Theoretical work attributes their activity to oxyl or μ1-O species. Verifying this intermediate experimentally has, however, been challenging. In the present study, these challenges were overcome by combining theory with new experimental strategies. Ab initio molecular dynamics of the solid–liquid interface were used to predict spectroscopic features, whereas sample architecture, developed for surface-sensitive X-ray spectroscopy of electrocatalysts in confined liquid, was used to search for these species under realistic conditions. Through this approach, we have identified μ1-O species during oxygen evolution. Potentiodynamic X-ray absorption additionally shows that these μ1-O species are created by electrochemical oxidation currents in a deprotonation reaction.

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Language(s): eng - English
 Dates: 2019-03-112019-01-242019-02-122019-04-11
 Publication Status: Published in print
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jpcc.9b00731
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Title: The Journal of Physical Chemistry C
  Abbreviation : J. Phys. Chem. C
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: 7 Volume / Issue: 123 (14) Sequence Number: - Start / End Page: 9146 - 9152 Identifier: ISSN: 1932-7447
CoNE: https://pure.mpg.de/cone/journals/resource/954926947766