Synthesis of Pt3Sn Alloy Nanoparticles and Their Catalysis for Electro-Oxidation of CO and Methanol

Monodisperse Pt3Sn alloy nanoparticles (NPs) were synthesized by a controlled coreduction of Pt(II) acetylacetonate and Sn(II) acetylacetonate at 180–280 °C in 1-octadecene. In the synthesis, oleylamine was used as a reducing agent, and oleylamine/oleic acid served as surfactants. The sizes of the P...

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Published inACS catalysis Vol. 1; no. 12; pp. 1719 - 1723
Main Authors Liu, Yi, Li, Dongguo, Stamenkovic, Vojislav R, Soled, Stuart, Henao, Juan D, Sun, Shouheng
Format Journal Article
LanguageEnglish
Published American Chemical Society 02.12.2011
Subjects
synthesis
catalysis
methanol oxidation
Pt3Sn nanoparticles
CO oxidation
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Summary:Monodisperse Pt3Sn alloy nanoparticles (NPs) were synthesized by a controlled coreduction of Pt(II) acetylacetonate and Sn(II) acetylacetonate at 180–280 °C in 1-octadecene. In the synthesis, oleylamine was used as a reducing agent, and oleylamine/oleic acid served as surfactants. The sizes of the Pt3Sn NPs were tuned from 4 to 7 nm by controlling the metal salt injection temperatures from 180 to 240 °C. These monodisperse Pt3Sn NPs were highly active for CO and methanol oxidation in 0.1 M HClO4 solutions, and their activity and stability could be further improved by a postsynthesis thermal treatment at 400 °C in Ar + 5% H2 for 1 h. They are promising as a practical catalyst for CO and methanol oxidation reactions in polymer electrolyte membrane fuel cell conditions.
ISSN:2155-5435
2155-5435
DOI:10.1021/cs200430r