Abstract: 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.

Cite: 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 OpenAlex ANCAN

Dates:

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

Identifiers:

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

Citing:

≡ Web of science	74	Сбор данных от 13.02.2026
≡ Scopus	75	Сбор данных от 15.02.2026
≡ OpenAlex	79	Сбор данных от 15.02.2026

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