Insight into the enhanced performance of TiO2 nanotube supported Pt catalyst for toluene oxidation

被引：88
作者：
Rui, Zebao [1 ]
Tang, Minni [2 ]
Ji, Weikang [1 ]
Ding, Junjie [2 ]
Ji, Hongbing [2 ]
机构：
[1] Sun Yat Sen Univ, Sch Chem Engn & Technol, Zhuhai 519082, Peoples R China
[2] Sun Yat Sen Univ, Sch Chem, Guangzhou 510275, Guangdong, Peoples R China
来源：
CATALYSIS TODAY | 2017年 / 297卷
关键词：
TiO2 nanotube array; Catalytic oxidation; Toluene; Platinum; Reaction mechanism; IN-SITU DRIFTS; PHOTOCATALYTIC OXIDATION; PLATINUM NANOPARTICLES; MILD CONDITIONS; LOW-TEMPERATURE; HCHO REMOVAL; COMBUSTION; DEACTIVATION; AIR; ADSORPTION;
D O I：
10.1016/j.cattod.2017.04.055
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Featuring an assembly of identical pores, TiO2 nanotube array (TiNT) makes an ideal monolith-like support of noble metal catalysts for volatile organic compounds combustion. Herein, the deep oxidation of gaseous toluene over Pt/TiNT and anatase TiO2 (ATiO(2)) particles supported Pt catalysts are studied and compared. Pt/TiNT demonstrates remarkably enhanced performance over Pt/ATiO2 powder catalyst, and ranges among the best performances of the state of the art Pt based catalysts. A toluene conversion of (>) 95% at 185 degrees C and a multiple heating-cooling cyclic stable performance with a time of (>) 300 h are achieved over 0.4 wt% Pt/TiNT. In situ DRIFTS study indicates that toluene is sequentially oxidized to benzaldehyde, benzoate, aliphatic carboxylates species, CO and finally to CO2, and the decomposition of benzoate species is the key step. The unique performance of Pt/TiNT is attributed to its ordered monolith-like structure, well-dispersion and surface enrichment of Pt, and enhanced benzoate species decomposition rate.
引用
收藏
页码：159 / 166
页数：8
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