Effect of TiO2 oxygen vacancy content on catalytic performance of AuPd/TiO2 for benzyl alcohol oxidation

被引：0
作者：
Li, Dongchen [1 ,2 ]
Guo, Xiaoyu [1 ,2 ]
Wang, Zhe [3 ]
Shi, Ronghui [4 ]
Zhao, Wei [1 ,2 ]
Li, Xiaoliang [1 ]
机构：
[1] State Key Laboratory of Clean and Efficient Utilization of Coal-Based Energy, Taiyuan University of Technology, Shanxi, Taiyuan
[2] College of Chemical Engineering and Technology, Taiyuan University of Technology, Shanxi, Taiyuan
[3] Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology, Shanxi, Taiyuan
[4] College of Ecological Environment and Urban Construction, Fujian University of Technology, Fujian, Fuzhou
来源：
Jingxi Huagong/Fine Chemicals | 2024年 / 41卷 / 12期
关键词：
AuPd nanoparticles; benzyl alcohol; catalysis technology; catalytic oxidation; oxygen vacancy; solvent-free; TiO[!sub]2[!/sub;
D O I：
10.13550/j.jxhg.20231061
中图分类号：
学科分类号：
摘要：
Three different AuPd/TiO2 catalysts were prepared via sol-immobilization method by loading active components Au and Pd onto the TiO2 supports (TiO2-G, TiO2-E and TiO2-H), which were synthesized by using tetrabutyl titanate as raw material through hydrothermal method, and characterized by XRD, XPS, N2 adsorption-desorption isotherm, EPR, ICP-AES, TEM and HRTEM. The effect of different oxygen vacancy content in TiO2 on the catalytic performance of AuPd/TiO2 for solvent-free oxidation of benzyl alcohol was analyzed. The results showed that AuPd/TiO2-G, with the highest oxygen vacancy content (0.198) and the smallest sized AuPd nanoparticles (1.83 nm), exhibited a transformation frequency of 70554 h–1, significantly better than AuPd/TiO2-H (39512 h–1) and AuPd/TiO2-E (14814 h–1 ), and the lowest apparent activation energy (55.77 kJ/mol), obviously lower than AuPd/TiO2-H (72.78 kJ/mol) and AuPd/TiO2-E (82.83 kJ/mol), indicating the best benzyl alcohol catalytic oxidation performance at 120 ℃. A higher content of oxygen vacancy in the support was conducive to the formation of smaller-sized AuPd nanoparticles and a higher content of surface Pd0 species on the catalyst surface, which was the key in achieving the excellent catalytic activity of AuPd/TiO2-G in the benzyl alcohol catalytic oxidation reaction. © 2024 Fine Chemicals. All rights reserved.
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页码：2674 / 2681
页数：7
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