Alkoxylation Reaction of Alcohol on Silica Surfaces Studied by Sum Frequency Vibrational Spectroscopy

Luo，Ting1,5; Zhang，Ruidan2,3; Zeng，Wei Wang1,5; Zhou，Chuanyao1; Yang，Xueming1,4; Ren，Zefeng1

2021

10.1021/acs.jpcc.1c02418

Journal of Physical Chemistry C   影响因子和分区

1932-7447

1932-7455

The interactions between adsorbed alcohols and oxide surfaces have attracted great interest because of their wide existence in nature and industry. Here we investigated the adsorption behaviors of alcohol on silica by surface-sensitive sum frequency vibrational spectroscopy (SFVS) under near-ambient pressure of alcohol and high-temperature conditions. A novel infrared spectral normalization method under high pressure was proposed in internal heterodyne phase-resolved SFVS measurements. The investigation of methanol adsorption on silanol and siloxane sites of silica indicates that the alkoxylation reactions proceed on both sites but preferentially on the siloxane sites at room temperature. The elevated temperature can improve the efficiency of the alkoxylation reactions. Our results not only provide direct evidence of the formation of alkoxy groups on silica-based materials in catalysis but also give guidelines for improving its catalytic activity based on the different reaction processes on two types of terminal sites on silica surfaces.

SCI ; EI

英语

其他

WOS:000647271300018

20211910310727

Catalyst activity ; Interferometry ; Vibrational spectroscopy

Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Optical Variables Measurements:941.4 ; Mechanical Variables Measurements:943.2

2-s2.0-85105062002

Scopus

1.State Key Laboratory of Molecular Reaction Dynamics,Dynamics Research Center for Energy and Environmental Materials,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,457 Zhongshan Road,116023,China
2.Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials,College of Physics and Energy,Fujian Normal University,Fuzhou,350117,China
3.Fujian Prov. Collab. Innov. Center for Advanced High-Field Superconducting Materials and Engineering,Fuzhou,350117,China
4.Department of Chemistry,Southern University of Science and Technology,Guangdong Shenzhen,1088 Xueyuan Road,518055,China
5.University of Chinese Academy of Sciences,Beijing,19A Yuquan Road,100049,China

Luo，Ting,Zhang，Ruidan,Zeng，Wei Wang,et al. Alkoxylation Reaction of Alcohol on Silica Surfaces Studied by Sum Frequency Vibrational Spectroscopy[J]. Journal of Physical Chemistry C,2021,125:8638-8646.

Luo，Ting,Zhang，Ruidan,Zeng，Wei Wang,Zhou，Chuanyao,Yang，Xueming,&Ren，Zefeng.(2021).Alkoxylation Reaction of Alcohol on Silica Surfaces Studied by Sum Frequency Vibrational Spectroscopy.Journal of Physical Chemistry C,125,8638-8646.

Luo，Ting,et al."Alkoxylation Reaction of Alcohol on Silica Surfaces Studied by Sum Frequency Vibrational Spectroscopy".Journal of Physical Chemistry C 125(2021):8638-8646.