Highly selective Pt/ordered mesoporous TiO2-SiO2 catalysts for hydrogenation of cinnamaldehyde: The promoting role of Ti(2.)

Qifan Wu; Chao Zhang; Bin Zhang; Xiaoru Li; Zhong Ying; Tong Liu; Weiwei Lin; Yancun Yu; Haiyang Cheng; Fengyu Zhao

doi:10.1016/j.jcis.2015.10.026

Highly selective Pt/ordered mesoporous TiO2-SiO2 catalysts for hydrogenation of cinnamaldehyde: The promoting role of Ti(2.)

J Colloid Interface Sci. 2016 Feb 1:463:75-82. doi: 10.1016/j.jcis.2015.10.026. Epub 2015 Oct 22.

Authors

Qifan Wu¹, Chao Zhang², Bin Zhang¹, Xiaoru Li¹, Zhong Ying¹, Tong Liu¹, Weiwei Lin³, Yancun Yu³, Haiyang Cheng³, Fengyu Zhao⁴

Affiliations

¹ State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
² State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China. Electronic address: czhang@ciac.ac.cn.
³ State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
⁴ State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China. Electronic address: zhaofy@ciac.ac.cn.

PMID: 26520813
DOI: 10.1016/j.jcis.2015.10.026

Abstract

A highly selective and stable catalyst based on Pt nanoparticles confined in Mesoporous TiO2-SiO2 frameworks were prepared and employed for selective hydrogenation of cinnamaldehyde to cinnamyl alcohol. The as-prepared Pt/MesoTiO2-SiO2-M catalyst displayed excellent selectivity to cinnamyl alcohol (around 91%) at nearly complete conversion. Ti(2+) and stronger metal-support interaction (SMSI) played key roles on the adsorption behavior of cinnamaldehyde and activation of CO bonds. The existence of amorphous SiO2 and mixed TiO2 phases (anatase and rutile) was helpful for the formation of Ti(2+) sites and SMSI. The electron-enriched Pt surfaces and the formed Pt-TiOx system benefited the enhanced activity and selectivity.

Keywords: Cinnamaldehyde; Mesoporous TiO(2)–SiO(2); SMSI; Selective hydrogenation; Ti(2+).