High performance diesel oxidation catalysts using ultra-low Pt loading on titania nanowire array integrated cordierite honeycombs

被引：32

作者：

Hoang, Son ^{[1
,2
]}

Lu, Xingxu ^{[1
,2
]}

Tang, Wenxiang ^{[1
,2
]}

Wang, Sibo ^{[1
,2
]}

Du, Shoucheng ^{[1
,2
]}

Nam, Chang-Yong ^{[3
]}

Ding, Yong ^{[4
]}

Vinluan, Rodrigo D., III ^{[5
]}

Zheng, Jie ^{[5
]}

Gao, Pu-Xian ^{[1
,2
]}

机构：

[1] Univ Connecticut, Dept Mat Sci & Engn, 97 North Eagleville Rd, Storrs, CT 06269 USA

[2] Univ Connecticut, Inst Mat Sci, 97 North Eagleville Rd, Storrs, CT 06269 USA

[3] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[4] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[5] Univ Texas Dallas, Dept Chem & Biochem, Richardson, TX 75080 USA

来源：

CATALYSIS TODAY | 2019年 / 320卷

基金：

美国国家科学基金会;

关键词：

TiO2; Nanowire array; Ultralow PGM; Diesel oxidation catalyst; Upstream promoter; MONOLITHIC CATALYSTS; CO OXIDATION; SULFUR-RESISTANCE; NO OXIDATION; TIO2; EFFICIENCY; REDUCTION; HYDROGEN; ANATASE; MODEL;

D O I：

10.1016/j.cattod.2017.11.019

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

High performance of an ultra-low Pt loading diesel oxidation catalyst can be achieved by using a combination of novel nano-array structured support, precise control of ultrafine active Pt particles, and an addition of H-2 as a promoter into the exhausts. Highly stable mesoporous rutile TiO2 nano-array was uniformly grown on threedimensional (3-D) cordierite honeycomb monoliths using a solvothermal synthesis. Atomic layer deposition was employed for precise dispersion of ultrafine Pt particles (0.95 +/- 0.24 nm) on TiO2 nano-array with a Pt loading of 1.1 g/ft(3). Despite low Pt loading, the Pt/TiO2 nano-array catalyst shows impressive low-temperature oxidation reactivity, with the conversion of CO and total hydrocarbon (THC) reaching 50% at 224 and 285 degrees C, respectively, in the clean diesel combustion (CDC) simulated exhaust conditions. The excellent activity is attributed to the unique nano-array structure that promotes gas-solid interaction and ultra-small Pt particle dispersion that increase surface Pt atoms. We also demonstrate that addition of more H2 into the exhaust can lower light-off temperature for CO and THC by up to similar to 60 degrees C and similar to 30 degrees C, respectively.

引用

页码：2 / 10

页数：9

共 51 条

[51] Thermally stable single atom Pt/m-Al2O3 for selective hydrogenation and CO oxidation [J].

Zhang, Zailei ;

Zhu, Yihan ;

Asakura, Hiroyuki ;

Zhang, Bin ;

Zhang, Jiaguang ;

Zhou, Maoxiang ;

Han, Yu ;

Tanaka, Tsunehiro ;

Wang, Aiqin ;

Zhang, Tao ;

Yan, Ning .

NATURE COMMUNICATIONS, 2017, 8

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