4.6 Article

Toward the decoration of Pt nanoparticles supported on carbon nanotubes with Fe oxides and its effect on the catalytic reaction

Journal

APPLIED CATALYSIS A-GENERAL
Volume 435, Issue -, Pages 131-140

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2012.05.046

Keywords

FeOx decorated Pt catalyst; Electrochemical measurement; Microwave assisted polyol reduction; Selective hydrogenation; Cinnamaldehyde

Funding

  1. Singapore Agency for Science, Technology and Research (A*STAR), SERC Grant [102 101 0020, 092 139 0037]

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Deposition of metallic oxides on noble metal catalysts improves their catalytic performance dramatically due to the highly active sites formed at the interface of two metals (nano-contact). In this work, Fe oxides were deposited on preformed Pt nanoparticles by using a novel microwave assisted polyol reduction method. The facile synthesis is performed in liquid phase at 438 X, which preserves the growth of large Pt nanoparticles and precludes the formation of Pt-Fe alloy. The Fe promoted Pt catalyst exhibited high activity (6340 h(-1) in turnover frequency) and selectivity (89.1% for cinnamal alcohol) in the hydrogenation of cinnamaldehyde, which was attributed to the uniform distribution of Fe promoters on Pt surfaces. The characteristics of Fe oxides on Pt nanoparticles were identified by employing electrochemical analysis and X-ray photoelectron spectroscopy. (c) 2012 Elsevier B.V. All rights reserved.

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