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01.10.2011 | Research Paper

Formation of PtRu alloy nanoparticle catalyst by radiolytic process assisted by addition of dl-tartaric acid and its enhanced methanol oxidation activity

verfasst von: Satoru Kageyama, Satoshi Seino, Takashi Nakagawa, Hiroaki Nitani, Koji Ueno, Hideo Daimon, Takao A. Yamamoto

Erschienen in: Journal of Nanoparticle Research | Ausgabe 10/2011

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Abstract

PtRu nanoparticle catalysts with 2-nm size supported on carbon were synthesized by a radiolytic process, assisted with the addition of dl-tartaric acid. Gradual alloying with the addition was confirmed by structural analyses with techniques of the X-ray diffraction and the X-ray absorption fine structure. Their methanol oxidation activities evaluated by the linear sweep voltammetry were higher than that of the commercial one, and found to be enhanced in accordance with the gradual change in the bimetallic structure from the Pt-core/Ru-shell to the random alloy. A good correlation was found between the catalytic activity and the indicators, which stands for the occurring frequency of the Pt–Ru bonds, calculated from the coordination numbers determined by the extended X-ray absorption fine structure analysis. It was confirmed that the addition of dl-tartaric acid in the radiolytic process certainly promoted the random alloy formation of PtRu bimetallic nanoparticles and enhanced their methanol oxidation activity.

Vorheriger Artikel I–V behavior of transition metal oxides′ nanoparticles confined in ion tracks

Nächster Artikel Control of the aggregation behavior of silver nanoparticles in polyurethane matrix

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Titel: Formation of PtRu alloy nanoparticle catalyst by radiolytic process assisted by addition of dl-tartaric acid and its enhanced methanol oxidation activity
verfasst von: Satoru Kageyama
Satoshi Seino
Takashi Nakagawa
Hiroaki Nitani
Koji Ueno
Hideo Daimon
Takao A. Yamamoto
Publikationsdatum: 01.10.2011
Verlag: Springer Netherlands
Erschienen in: Journal of Nanoparticle Research / Ausgabe 10/2011
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-011-0513-x

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