Effect of Alkali Metal Promoters on Water-Gas Shift Activity over Au-Pt/CeO2 Catalyst

被引：9

作者：

Yu Qiangqiang ^{[1
]}

Li Yang ^{[1
]}

Zou Xuhua ^{[1
]}

Zhuo Hongying ^{[1
]}

Yao Yuanyuan ^{[1
]}

Suo Zhanghuai ^{[1
]}

机构：

[1] Yantai Univ, Inst Appl Catalysis, Yantai 264005, Shandong, Peoples R China

来源：

CHINESE JOURNAL OF CATALYSIS | 2010年 / 31卷 / 06期

关键词：

ceria; platinum; gold; potassium; promoter; water-gas shift; PREFERENTIAL CO OXIDATION; GOLD CATALYSTS; REACTION-MECHANISM; HYDROGEN; CERIA; PERFORMANCE; POTASSIUM; PT/AL2O3; AU/CEO2; CARBON;

D O I：

10.3724/SP.J.1088.2010.91131

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Au-Pt/CeO2 catalyst samples modified with alkali metals M (M = Na, K, Rb, and Cs) were prepared and their catalytic activity for water-gas shift (WGS) was evaluated. The structure and surface properties of the Au-Pt/CeO2 catalyst promoted by potassium were investigated by X-ray powder diffraction, H-2 temperature-programmed reduction, ultraviolet-visible diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The higher activity obtained on the K-promoted Au-Pt/CeO2 sample was possibly due to the reduction of Au3+ species and the enrichment of Ce3+ on the catalyst surface, which generated more oxygen vacancies. The catalytic activity of Au-Pt/CeO2 was greatly influenced by the alkali metals. When the K content was 0.025%, the CO conversion achieved up to 95% at 250 degrees C.

引用

页码：671 / 676

页数：6

共 28 条

[1] Low-temperature water-gas shift reaction over Au/alpha-Fe2O3
Andreeva, D
Idakiev, V
Tabakova, T
Andreev, A
[J]. JOURNAL OF CATALYSIS, 1996, 158 (01) : 354 - 355
[2] Low-temperature water-gas shift reaction over Au/CeO2 catalysts
Andreeva, D
Idakiev, V
Tabakova, T
Ilieva, L
Falaras, P
Bourlinos, A
Travlos, A
[J]. CATALYSIS TODAY, 2002, 72 (1-2) : 51 - 57
[3] Gold catalysts supported on ceria doped by rare earth metals for water gas shift reaction: Influence of the preparation method
Andreeva, D.
Ivanov, I.
Ilieva, L.
Abrashev, M. V.
Zanella, R.
Sobczak, J. W.
Lisowski, W.
Kantcheva, M.
Avdeev, G.
Petrov, K.
[J]. APPLIED CATALYSIS A-GENERAL, 2009, 357 (02) : 159 - 169
[4] Potassium-doped CO3O4 catalyst for direct decomposition of N2O
Asano, Kimihiro
Ohnishi, Chie
Iwamoto, Shinji
Shioya, Yasushi
Inoue, Masashi
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2008, 78 (3-4) : 242 - 249
[5] Bifunctional catalysts for single-stage water-gas shift reaction in fuel cell applications. Part 1. Effect of the support on the reaction sequence
Azzam, K. G.
Babich, I. V.
Seshan, K.
Lefferts, L.
[J]. JOURNAL OF CATALYSIS, 2007, 251 (01) : 153 - 162
[6] Gold catalysts for pure hydrogen production in the water-gas shift reaction: activity, structure and reaction mechanism
Burch, Robbie
[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2006, 8 (47) : 5483 - 5500
[7] Gold nanoparticles: Assembly, supramolecular chemistry, quantum-size-related properties, and applications toward biology, catalysis, and nanotechnology
Daniel, MC
Astruc, D
[J]. CHEMICAL REVIEWS, 2004, 104 (01) : 293 - 346
[8] Active nonmetallic Au and Pt species on ceria-based water-gas shift catalysts
Fu, Q
Saltsburg, H
Flytzani-Stephanopoulos, M
[J]. SCIENCE, 2003, 301 (5635) : 935 - 938
[9] Activity and stability of low-content gold-cerium oxide catalysts for the water-gas shift reaction
Fu, Q
Deng, WL
Saltsburg, H
Flytzani-Stephanopoulos, M
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 56 (1-2) : 57 - 68
[10] Studies of the water-gas-shift reaction with ceria-supported precious metals
Gorte, RJ
Zhao, S
[J]. CATALYSIS TODAY, 2005, 104 (01) : 18 - 24

← 1 2 3 →