DataVXThe Journal of Physical Chemistry CPaper
journal article·2021-04-29

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

Ting Luo, Ruidan Zhang, Wei-Wang Zeng, Chuanyao Zhou, Xueming Yang, Zefeng Ren

The Journal of Physical Chemistry C· Volume 125· Issue 16
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Source abstract

Abstract

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.
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Research context

Catalysis & surfaces

OpenAlex topics: Spectroscopy and Quantum Chemical Studies · Spectroscopy and Laser Applications · Photosynthetic Processes and Mechanisms

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China

University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, P. R. China

Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China

Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, Fuzhou 350117, China

Department of Chemistry, Southern University of Science and Technology, 1088 Xueyuan Road, Guangdong, Shenzhen 518055, P. R. China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Chinese Academy of Sciences

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