Comprehensive study of the light-off performance and surface properties of engine-aged Pd-based three-way catalysts

被引：21

作者：

Haneda, Masaaki ^{[1
,2
]}

Nakamura, Yuichiro ^{[1
]}

Yamada, Tatsuya ^{[1
]}

Minami, Shigekazu ^{[3
]}

Kato, Naohiro ^{[3
]}

Iwashina, Katsuya ^{[4
]}

Endo, Yoshinori ^{[4
]}

Nakahara, Yunosuke ^{[4
]}

Iwachido, Kinichi ^{[5
]}

机构：

[1] Nagoya Inst Technol, Adv Ceram Res Ctr, 10-6-29 Asahigaoka, Tajimi, Gifu 5070071, Japan

[2] Nagoya Inst Technol, Frontier Res Inst Mat Sci, Showa Ku, Gokiso Cho, Nagoya, Aichi 4658555, Japan

[3] Umicore Shokubai Japan Co Ltd, Chuo Ku, 4-2-16 Minatojima Minamimachi, Kobe, Hyogo 6500047, Japan

[4] Mitsui Min & Smelting Co Ltd, 1013-1 Ageoshimo, Ageo, Saitama 3620025, Japan

[5] Mitsubishi Motors Corp, 1 Nakashinkiri,Hashime Cho, Okazaki, Aichi 4448501, Japan

来源：

CATALYSIS SCIENCE & TECHNOLOGY | 2021年 / 11卷 / 03期

关键词：

OXYGEN STORAGE CAPACITY; PLUS NO REACTION; PARTICLE-SIZE; CO OXIDATION; CO+NO REACTION; PD/AL2O3; REDUCTION; DISPERSION; INTERFACE; PALLADIUM;

D O I：

10.1039/d0cy01952f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The light-off performance of engine-aged model three-way catalysts composed of a mixture of Pd/Al2O3 and Pd/CeO2-ZrO2 was evaluated by using a simulated exhaust gas and an engine dynamometer. A satisfactory correlation was observed between the light-off temperature for engine-aged catalysts evaluated under simulated- and real-exhaust gas conditions, suggesting that the elucidation of the catalytic behavior using powder catalysts under simulated exhaust gas conditions is coupled to understanding the phenomena that occurred on the catalysts under realistic conditions using the engine dynamometer. Hydrogen temperature programmed reduction (H-2-TPR) measurements and Fourier-transform infrared (FTIR) spectroscopy following CO adsorption revealed that the quality of the Pd-support oxide interface as well as the surface state of Pd particles are strongly affected by high-temperature engine ageing. The Pd particle size dependence on the fraction of the Pd corner sites was consistent with that of the turnover frequency for NO reduction and CO/C3H6 oxidation, indicating that Pd particles with a high fraction of corner sites are highly active for three-way catalytic reactions.

引用

页码：912 / 922

页数：11

共 68 条

[1] Palladium supported on structured and nonstructured carbon: A consideration of Pd particle size and the nature of reactive hydrogen [J].

Amorim, Claudia ;

Keane, Mark A. .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2008, 322 (01) :196-208

[2] On the importance of metal-oxide interface sites for the water-gas shift reaction over Pt/CeO2 catalysts [J].

Aranifard, Sara ;

Ammal, Salai Cheettu ;

Heyden, Andreas .

JOURNAL OF CATALYSIS, 2014, 309 :314-324

[3] Characterisation of three-way automotive aftertreatment catalysts and related model systems [J].

Bernal, S ;

Blanco, G ;

Calvino, JJ ;

Gatica, JM ;

Omil, JAP ;

Pintado, JM .

TOPICS IN CATALYSIS, 2004, 28 (1-4) :31-45

[4] Infrared studies of CO oxidation by oxygen and by water over Pt/Al2O3 and Pd/Al2O3 catalysts [J].

Busca, Guido ;

Finocchio, Elisabetta ;

Sanchez Escribano, Vicente .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2012, 113 :172-179

[5] Characterization by CO/FTIR spectroscopy of Pd/silica catalysts and its correlation with syn-gas conversion [J].

Cabilla, GC ;

Bonivardi, AL ;

Baltanás, MA .

CATALYSIS LETTERS, 1998, 55 (3-4) :147-156

[6] Three-dimensional modeling and simulation of a micrometer-sized particle hierarchical structure with macro- and meso-pores [J].

Caravella, Alessio ;

Hara, Shigeki ;

Hara, Nobuo ;

Obuchi, Akira ;

Uchisawa, Junko .

CHEMICAL ENGINEERING JOURNAL, 2012, 210 :363-373

[7] Pd/Ce0.6Zr0.4O2/Al2O3 as advanced materials for three-way catalysts -: Part 1.: Catalyst characterisation, thermal stability and catalytic activity in the reduction of NO by CO [J].

Di Monte, R ;

Fornasiero, P ;

Kaspar, J ;

Rumori, P ;

Gubitosa, G ;

Graziani, M .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2000, 24 (3-4) :157-167

[8]

Di Monte R, 2004, TOP CATAL, V28, P47

[9] Nanostructured CeO2-ZrO2 mixed oxides [J].

Di Monte, R ;

Kaspar, J .

JOURNAL OF MATERIALS CHEMISTRY, 2005, 15 (06) :633-648

[10] Activating Edge Sites on Pd Catalysts for Selective Hydrogenation of Acetylene via Selective Ga2O3 Decoration [J].

Ding, Liangbing ;

Yi, Hong ;

Zhang, Wenhua ;

You, Rui ;

Cao, Tian ;

Yang, Jinlong ;

Lu, Junling ;

Huang, Weixin .

ACS CATALYSIS, 2016, 6 (06) :3700-3707

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