Influence of Inner- and Outer-Sphere Electron Transfer Mechanisms during Electrocatalysis of Oxygen Reduction in Alkaline Media

Content Provider	Semantic Scholar
Author	Ramaswamy, Nagappan Mukerjee, Sanjeev
Copyright Year	2011
Abstract	Oxygen reduction reaction (ORR) is generally considered to be more facile in alkaline media compared to its acidic counterparts. The fundamental reasoning for this statement has been quite elusive and not understood very well. A pertinent review of the literature in alkaline media on noble and non-noble metal electrocatalysts is presented here along with experimental results to investigate the rationale behind the so-called kinetic facility in alkaline media. Increasing the pH from 0 to 14 has several effects on the electrode–electrolyte interface in terms of the working electrode potential range, the strength of adsorption of the reaction intermediates, and spectator species. Besides these, the reasons for kinetic facility are investigated from the perspective of the changes in the double layer structure and electrochemical reaction mechanisms in transitioning from acidic to alkaline environment. In this context, specifically adsorbed hydroxyl species are found to promote an outer-sphere electron transfe...
Starting Page	18015
Ending Page	18026
Page Count	12
File Format	PDF HTM / HTML
DOI	10.1021/jp204680p
Volume Number	115
Alternate Webpage(s)	https://www.northeastern.edu/nucret/wp-content/uploads/2017/03/PDF-Influence-of-Inner-and-Outer-Sphere-Electron-Transfer-Mechanisms-during-Electrocatalysis-of-Oxygen-Reduction-in-Alkaline-Media.pdf
Alternate Webpage(s)	https://doi.org/10.1021/jp204680p
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article