Nano-Micro Letters

Green-Chemistry Compatible Approach to TiO2-Supported PdAu Bimetallic Nanoparticles for Solvent-Free 1-Phenylethanol Oxidation Under Mild Conditions

Jian-Bing Chang, Chang-Hai Liu, Jie Liu, Yu-Yan Zhou, Xu Gao, Sui-Dong Wang*

Abstract
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Nano-Micro Letters, , Volume 7, Issue 3, pp 307-315

First Online: 09 Jun 2015 (Article)

DOI:10.1007/s40820-015-0044-6

 

Abstract

 


XRD patterns of TiO2 NPs (anatase) and TiO2-supported metal NPs with different Pd/Au atomic ratio.
TiO2-supported PdAu bimetallic nanoparticles (NPs) with small size and good dispersity were prepared by the room temperature ionic liquid-assisted bimetal sputtering, which is simple, environmentally friendly, and free of additives and byproducts. Pd/Au atomic ratio can be tuned by controlling the sputtering conditions simply. High catalytic activity was found in PdAu-NPs-TiO2 hybrids for solvent-free selective oxidation of 1-phenylethanol using O2 as the oxidant at low temperature of 50 °C and low pressure of 1 atm. It was found that Pd/Au ratio strongly affected the catalytical activity, and the highest conversion of about 35 % and turnover frequency of about 421 h-1 were achieved at 1:1of Pd/Au atomic ratio. The synergistic effect in PdAu NPs was also discussed based on the comprehensive characterization results. The present approach may offer an alternative platform for future development of green-chemistry compatible bimetallic nanocatalysts.

 

Keywords

PdAu nanoparticles; TiO2 nanosupport; Electronic structure

 

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