Green-chemistry Compatible Approach to TiO2-supported PdAu Bimetallic Nanoparticles for Solvent-free 1-Phenylethanol Oxidation under Mild Conditions

• Published in: Nano-micro letters Vol. 7; no. 3; pp. 307 - 315
• Main Authors: Chang, Jian-Bing, Liu, Chang-Hai, Liu, Jie, Zhou, Yu-Yan, Gao, Xu, Wang, Sui-Dong
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2015
• Subjects: Engineering; Nanoscale Science and Technology; Nanotechnology; Nanotechnology and Microengineering; Electronic structure; TiO; nanosupport; PdAu nanoparticles
• ISSN: 2150-5551; 2311-6706; 2150-5551
• DOI: 10.1007/s40820-015-0044-6

Ti O2-supported Pd Au 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 Pd Au–NPs–Ti O2 hybrids for solvent-free selective oxidation of 1-phenylethanol using O2 as the oxidant at the 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-1were achieved at 1:1 of Pd/Au atomic ratio. The synergistic effect in Pd Au 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.