Defective zeolite TS-1 confined Pt nanoclusters with superior performance for CO and soot catalytic oxidation

被引：13
作者：
Zhou, Xiaoxia [1 ]
Zhang, Heng [1 ]
Sun, Yuanyuan [2 ]
Gao, Zhe [3 ]
Chen, Hangrong [1 ]
机构：
[1] Shanghai Inst Ceram, Chinese Acad Sci, State Key Lab High Performance Ceram & Superfine M, 1295 Dingxi Rd, Shanghai 200050, Peoples R China
[2] Hainan Normal Univ, Coll Chem & Chem Engn, Key Lab Laser Technol & Optoelect Funct Mat Hainan, Key Lab Funct Mat & Photoelectrochemistry Haikou, Haikou 571158, Peoples R China
[3] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan South Rd 27, Taiyuan 030001, Peoples R China
来源：
FUEL | 2023年 / 351卷
基金：
中国国家自然科学基金;
关键词：
Pt nanoparticles; defective zeolite TS-1; CO conversion; Soot oxidation; Confinement effect; RESISTANT; TIO2;
D O I：
10.1016/j.fuel.2023.128805
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Catalytic oxidation is an important reaction in the treatment of diesel exhaust. Herein, a facile self-assembly strategy has been developed to synthesize defective zeolite confined-catalyst Pt@TS-1 with ultra-low Pt loading, which shows super catalytic activity in the CO conversion (T90 = 175 degrees C) and soot oxidation (T90 = 490 degrees C). Owing to the confinement effect of zeolite, the obtained catalyst Pt@TS-1 exhibits a high percentage of Pt2+, smaller Pt nanoparticles and sufficient Ti3+-VO & BULL; defects, which can greatly accelerate the adsorption and conversion of CO, and the deep oxidation of soot. In-situ DRIFTS results demonstrate that rich and smaller Pt nanoparticles confined in zeolite may be responsible for excellent CO conversion. Significantly, the catalyst Pt@TS-1 also shows excellent catalytic stability and good resistance to water and sulfur, showing the potential for industrial applications.
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页数：10
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