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

被引：31

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

[1] Mass transport and catalytic activity in hierarchical/non-hierarchical and internal/external nanostructures: A novel comparison using 3D simulation [J].

Al-Halhouli, Mohammad ;

Kieninger, Jochen ;

Yurchenko, Olena ;

Urban, Gerald .

APPLIED CATALYSIS A-GENERAL, 2016, 517 :12-20

[2] Evaluation of H2 effect on NO oxidation over a diesel oxidation catalyst [J].

Azis, Muhammad Mufti ;

Auvray, Xavier ;

Olsson, Louise ;

Creaser, Derek .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2015, 179 :542-550

[3] KINETICS OF CO OXIDATION ON SINGLE-CRYSTAL PD, PT, AND IR [J].

BERLOWITZ, PJ ;

PEDEN, CHF ;

GOODMAN, DW .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (18) :5213-5221

[4] Experimental and kinetic study of NO oxidation on model Pt catalysts [J].

Bhatia, Divesh ;

McCabe, Robert W. ;

Harold, Michael P. ;

Balakotaiah, Vemuri .

JOURNAL OF CATALYSIS, 2009, 266 (01) :106-119

[5] Low-Temperature CO Oxidation over a Ternary Oxide Catalyst with High Resistance to Hydrocarbon Inhibition [J].

Binder, Andrew J. ;

Toops, Todd J. ;

Unocic, Raymond R. ;

Parks, James E., II ;

Dai, Sheng .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2015, 54 (45) :13263-13267

[6] Relation between crystallite size and dispersion on supported metal catalysts [J].

Borodzinski, A ;

Bonarowska, M .

LANGMUIR, 1997, 13 (21) :5613-5620

[7] Titanium Dioxide (Anatase and Rutile): Surface Chemistry, Liquid Solid Interface Chemistry, and Scientific Synthesis of Supported Catalysts [J].

Bourikas, Kyriakos ;

Kordulis, Christos ;

Lycourghiotis, Alexis .

CHEMICAL REVIEWS, 2014, 114 (19) :9754-9823

[8]

Carranza R, 1999, CHEM PROCESS, V62, P47

[9] Manganese Oxide Nanoarray-Based Monolithic Catalysts: Tunable Morphology and High Efficiency for CO Oxidation [J].

Chen, Sheng-Yu ;

Song, Wenqiao ;

Lin, Hui-Jan ;

Wang, Sibo ;

Biswas, Sourav ;

Mollahosseini, Mehdi ;

Kuo, Chung-Hao ;

Gao, Pu-Xian ;

Suib, Steven L. .

ACS APPLIED MATERIALS & INTERFACES, 2016, 8 (12) :7834-7842

[10]

Du S., 2017, Emission Contr. Sci. Technol, V3, P18, DOI DOI 10.1007/S40825-016-0054-Y

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