The effect of phosphorous precursor on the CO oxidation activity of P-modified TiO2 supported Ag catalysts

被引：27

作者：

Comsup, Nattaya ^{[1
]}

Panpranot, Joongjai ^{[1
]}

Praserthdam, Piyasan ^{[1
]}

机构：

[1] Chulalongkorn Univ, Fac Engn, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Bangkok 10330, Thailand

来源：

CATALYSIS COMMUNICATIONS | 2010年 / 11卷 / 15期

关键词：

P-modified TiO2; CO oxidation; Ag/TiO2; Phosphorous precursor; PHOTOCATALYTIC ACTIVITY; INTRAMOLECULAR SELECTIVITY; CARBON-MONOXIDE; MESOPOROUS TIO2; OXIDES; HYDROGENATION; PHOSPHATE; AU/TIO2; CROTONALDEHYDE; DECOMPOSITION;

D O I：

10.1016/j.catcom.2010.06.014

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：

Nanocrystalline TiO2 and P-modified TiO2 with P/Ti atomic ratio 0.01 were prepared by the solvothermal method and employed as the supports for Ag/TiO2 catalysts for CO oxidation reaction. The incorporation of phosphorus into the TiO2 lattice in the form of Ti-O-P resulted in an increase of both surface area and metal dispersion. The P-modified TiO2 supported Ag catalysts using phosphorus precursor in the form of oxide promoted the weak adsorbed oxygen species and resulted in catalytic activity improvement in CO oxidation. However, the use of phosphorous precursor in the form of phosphate such as H3PO4, (NH4)(2)HPO4. (C2H5)(3)PO4 could result in the strongly adsorbed oxygen species and/or the bidentate of phosphate species blocking the active sites instead. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1238 / 1243

页数：6

共 38 条

[1] Mesoporous titanium phosphate molecular sieves with ion-exchange capacity [J].

Bhaumik, A ;

Inagaki, S .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (04) :691-696

[2] Effect of highly dispersed active sites of Cu/TiO2 catalyst on CO oxidation [J].

Chen, Ching-Shiun ;

You, Jiann-Hwa ;

Lin, Jarrn-Horng ;

Chen, Yu-Yuan .

CATALYSIS COMMUNICATIONS, 2008, 9 (14) :2381-2385

[3] HALL EFFECT STUDIES OF OXYGEN CHEMISORPTION ON ZINC OXIDE [J].

CHON, H ;

PAJARES, J .

JOURNAL OF CATALYSIS, 1969, 14 (03) :257-&

[4] Hydrogenation of crotonaldehyde on Pt/TiO2 catalysts:: Influence of the phase composition of titania on activity and intramolecular selectivity [J].

Claus, P ;

Schimpf, S ;

Schodel, R ;

Kraak, P ;

Morke, W ;

Honicke, D .

APPLIED CATALYSIS A-GENERAL, 1997, 165 (1-2) :429-441

[5] Effect of TiO2 Crystallite Size on the Activity of CO Oxidation [J].

Comsup, Nattaya ;

Panpranot, Joongjai ;

Praserthdam, Piyasan .

CATALYSIS LETTERS, 2009, 133 (1-2) :76-83

[6] Role of phosphorus in synthesis of phosphated mesoporous TiO2 photocatalytic materials by EISA method [J].

Fan, Xiaoxing ;

Yu, Tao ;

Wang, Ying ;

Zheng, Jing ;

Gao, Ling ;

Li, Zhaosheng ;

Ye, Jinhua ;

Zou, Zhigang .

APPLIED SURFACE SCIENCE, 2008, 254 (16) :5191-5198

[7] METAL SUPPORT INTERACTION - GROUP-VIII METALS AND REDUCIBLE OXIDES [J].

HALLER, GL ;

RESASCO, DE .

ADVANCES IN CATALYSIS, 1989, 36 :173-235

[8] CO oxidation on Au nanoparticles supported on wormhole HMS material: Effect of support modification with CeO2 [J].

Hernandez, Jose A. ;

Gomez, S. ;

Pawelec, B. ;

Zepeda, T. A. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 89 (1-2) :128-136

[9] STUDY OF METAL-OXIDE CATALYSTS BY TEMPERATURE PROGRAMMED DESORPTION .4. OXYGEN-ADSORPTION ON VARIOUS METAL-OXIDES [J].

IWAMOTO, M ;

YODA, Y ;

YAMAZOE, N ;

SEIYAMA, T .

JOURNAL OF PHYSICAL CHEMISTRY, 1978, 82 (24) :2564-2570

[10] Poisoning effect of SO2 on the catalytic activity of Au/TiO2 investigated with XPS and in situ FT-IR [J].

Kim, MR ;

Woo, SI .

APPLIED CATALYSIS A-GENERAL, 2006, 299 :52-57

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