Using Ordered Carbon Nanomaterials for Shedding Light on the Mechanism of the Cathodic Oxygen Reduction Reaction | Sciact - CRIS-system of Boreskov Institute of Catalysis

Using Ordered Carbon Nanomaterials for Shedding Light on the Mechanism of the Cathodic Oxygen Reduction Reaction Full article

Journal

Langmuir
ISSN: 0743-7463 , E-ISSN: 1520-5827

Output data

Year: 2011, Volume: 27, Number: 14, Pages: 9018-9027 Pages count : 10 DOI: 10.1021/la2006343

Tags

Fuel cells; Oxygen; Platinum

Authors

Ruvinskiy Pavel S. ¹ , Bonnefont Antoine ² , Pham-Huu Cuong ¹ , Savinova Elena R. ¹

Affiliations

1	Laboratoire des Materiaux, Surfaces et Procedes pour la Catalyse, UMR 7515 du CNRS-UdS, Ecole de Chimie, Polymeres et Maeriaux, Universite de Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France
2	Institut de Chimie de Strasbourg, UMR 7177 du CNRS-UdS, 4 rue Blaise Pascal, Universite de Strasbourg, 67070 Strasbourg, France

Insufficient understanding of the mechanism of the cathodic oxygen reduction reaction puts constraints on the improvement of the efficiency of polymer electrolyte fuel cells (PEMFCs). We apply ordered catalytic layers based on vertically aligned carbon nanofilaments and combine experimental rotating ring-disk studies with mathematical modeling for shedding light on the mechanism of the oxygen reduction reaction on Pt nanoparticles. Based on the experimental and simulation evidence we propose a dual path ORR mechanism which comprises a “direct 4e−” and a “series 2e− + 2e−” pathway and explains switching between the two. For the first time we show that below 0.8 V the “direct” path may be discarded and the ORR predominantly occurs via H2O2 mediated pathway, while in the potential interval between ca. 0.8 V and the onset of the ORR the “direct” path is dominating.

Ruvinskiy P.S. , Bonnefont A. , Pham-Huu C. , Savinova E.R.
Using Ordered Carbon Nanomaterials for Shedding Light on the Mechanism of the Cathodic Oxygen Reduction Reaction
Langmuir. 2011. V.27. N14. P.9018-9027. DOI: 10.1021/la2006343 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Feb 17, 2011
Accepted:	Apr 18, 2011
Published online:	Jun 14, 2011
Published print:	Jul 19, 2011

Web of science:	WOS:000292617800051
Scopus:	2-s2.0-79960285284
Elibrary:	28611398
Chemical Abstracts:	2011:751094
Chemical Abstracts (print):	155:107706
OpenAlex:	W2318122794

DB	Citing
Web of science	73
Scopus	74
OpenAlex	78