Oxygen reduction reaction at Pt single crystals: a critical overview

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Title: Oxygen reduction reaction at Pt single crystals: a critical overview
Authors: Gómez Marín, Ana María | Rizo, Rubén | Feliu, Juan M.
Research Group/s: Electroquímica de Superficies
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Oxygen reduction reaction | Platinum single crystals
Knowledge Area: Química Física
Issue Date: 26-Feb-2014
Publisher: Royal Society of Chemistry
Citation: Catalysis Science & Technology. 2014, 4: 1685-1698. doi:10.1039/C3CY01049J
Abstract: Oxygen reduction reaction (ORR) dynamics at platinum single crystal surfaces is reviewed, and experimental results in acid and alkaline solutions are discussed in the framework of theoretical studies. Special emphasis is devoted to point out the role of the surface charge, water structure and adsorbed oxygen containing species. Additionally, discussion about the possible relevance of hydrogen peroxide as an intermediate species is also included. It is shown that the ORR is a complex process affected by many different factors and so neither surface charge nor oxygen-containing species coverage alone are a determining factor of the electrode activity. Instead, adlayer structures and the relation between adsorbed water, H2Oads, water dissociation products, OHads or Oads, and PtO oxide species coverage affect the whole energetics of the adsorption processes and may determine the surface reactivity. Finally, if H2O2 is an intermediate product in the ORR mechanism, it would be crucial to find a suitable catalyst able to effectively reduce H2O2 at high potentials and inhibit its oxidation.
Sponsor: Financial support from the Spanish MICYNN though the project CTQ2010-16271 and the European Commission FP7 Initial Training Network “ELCAT”, grant agreement no. 214936-2 are greatly acknowledged.
URI: http://hdl.handle.net/10045/45293
ISSN: 2044-4753 (Print) | 2044-4761 (Online)
DOI: 10.1039/C3CY01049J
Language: eng
Type: info:eu-repo/semantics/article
Rights: © Royal Society of Chemistry 2014
Peer Review: si
Publisher version: http://dx.doi.org/10.1039/C3CY01049J
Appears in Collections:INV - EQSUP - Artículos de Revistas

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