Oxygen reduction at platinum electrodes: The interplay between surface and surroundings properties

Author(s)

Gomez-Marin, Ana M. ^[1] ; Feliu, Juan M. ^[2]

Affiliation

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, Fis Quim, Caixa Postal 780, Ave Trabalhador Sao Carlense, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Alicante, Inst Electroquim, Apt 99, E-03080 Alicante - Spain

• Document type: Review article
• Source: CURRENT OPINION IN ELECTROCHEMISTRY; v. 9, p. 166-172, JUN 2018.
• Web of Science Citations: 9

Abstract

In this work, recent progress in the understanding of the mechanism of the oxygen reduction reaction at Pt surfaces is shortly reviewed. Specifically, the presence of a soluble and short-lived intermediate different to H2O2 in the ORR reaction path and the interrelated effect between the surface arrangement, adsorption of oxygen-containing species and water structure in the ORR reactivity in acid environments are discussed. Besides, the influence of the proton concentration on the ORR product distribution, the existence of a chemical step and the possible role of the soluble intermediate as a bifurcation point in the mechanism are also analyzed. (AU)

• FAPESP's process: 14/23486-9 - Development of nanostructured electrocatalysts for electro-oxygen reduction reaction: study of activity and stability
• Grantee: Ana Maria Gómez Marín
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion
• Grantee: Edson Antonio Ticianelli
• Support Opportunities: Research Projects - Thematic Grants