One step synthesis of chlorine-free Pt/Nitrogen-doped graphene composite for oxygen reduction reaction

Abstract Chlorine-free Platinum/nitrogen-doped graphene oxygen reduction reaction catalysts were synthesized by a one step method of annealing a mixture of platinum acetylacetonate and graphene oxide under ammonia atmosphere. Nanoparticles with close to the ideal particle size for oxygen reduction r...

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Bibliographic Details
Main Authors: Varga Tamás
Varga Ágnes Tímea
Ballai Gergő
Haspel Henrik
Kukovecz Ákos
Kónya Zoltán
Format: Article
Published: 2018
Series:CARBON 133
Subjects:
doi:10.1016/j.carbon.2018.03.020

mtmt:3347063
Online Access:http://publicatio.bibl.u-szeged.hu/13118
Description
Summary:Abstract Chlorine-free Platinum/nitrogen-doped graphene oxygen reduction reaction catalysts were synthesized by a one step method of annealing a mixture of platinum acetylacetonate and graphene oxide under ammonia atmosphere. Nanoparticles with close to the ideal particle size for oxygen reduction reaction (ORR) were formed, i.e., with diameter of 3–4 nm (500 and 600 °C) and 6 nm (700 °C). X-ray photoelectron spectroscopy confirmed the successful introduction of both pyridinic and pyrrolic type nitrogen moieties into the graphene layers, which indicates a strong interaction between the nanoparticles and the graphene layers. The electrocatalytic activity of glassy carbon electrodes (GCE) modified with the synthesized Pt/NG samples for oxygen reduction was compared to that of a platinum/carbon black catalyst modified electrode in acidic and alkaline media. Based on the measured limiting current densities and calculated electron transfer number, the highest activity was measured in acidic and alkaline media on the samples annealed at 600 and 700 °C, respectively.
Physical Description:90-100
ISSN:0008-6223