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  Dissolution of noble metals during oxygen evolution in acidic media

Cherevko, S., Žeradjanin, A. R., Topalov, A. A., Kulyk, N., Katsounaros, I., & Mayrhofer, K. J. J. (2014). Dissolution of noble metals during oxygen evolution in acidic media. ChemCatChem, 6(8), 2219-2223. doi:10.1002/cctc.201402194.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-C9A0-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-D27C-E
Genre: Journal Article

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 Creators:
Cherevko, Serhiy1, Author              
Žeradjanin, Aleksandar R.1, Author              
Topalov, Angel Angelov1, Author              
Kulyk, Nadiia1, Author              
Katsounaros, Ioannis1, Author              
Mayrhofer, Karl J. J.1, Author              
Affiliations:
1Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              

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Free keywords: Dissolution; Electrochemistry; Noble Metals; Oxygen; Stability
 Abstract: The electrochemical production of hydrogen and hydrocarbons is considered to play a decisive role in the conversion and storage of excess amounts of renewable energy. The electrocatalysis of the oxygen evolution reaction (OER), however, faces significant challenges for practical implementation of electrolyzers. In this work, a comparative study on the activity and stability of oxidized polycrystalline noble metals during the OER is presented. All studied metals exhibit transient and steady-state dissolution. Transient dissolution takes place during oxide formation and reduction. Steady-state dissolution depends on the OER mechanism on each surface: On metals such as Ru and Au, for which oxygen from the oxide participates in the OER, the Tafel slope is low and the dissolution rate is high. In contrast, on metals for which oxygen evolves directly from adsorbed water, such as Pt and presumably Pd, the Tafel slopes are high and the dissolution rates are low. This should be considered in the design of optimal OER catalysts.

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Language(s): eng - English
 Dates: 2014-08
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: ISI: 000340574600011
DOI: 10.1002/cctc.201402194
 Degree: -

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Title: ChemCatChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 6 (8) Sequence Number: - Start / End Page: 2219 - 2223 Identifier: ISSN: 1867-3880
CoNE: /journals/resource/1867-3880