Control of titania nanodomain size as a route to modulate SMSI effect in Pt/TiO2 catalysts

被引：19

作者：

Bonne, Magali ^{[1
]}

Samoila, Petrisor ^{[1
]}

Ekou, Tchirioua ^{[1
,2
]}

Especel, Catherine ^{[1
]}

Epron, Florence ^{[1
]}

Marecot, Patrice ^{[1
]}

Royer, Sebastien ^{[1
]}

Duprez, Daniel ^{[1
]}

机构：

[1] CNRS, UMR 6503, LACCO, F-86022 Poitiers, France

[2] Univ Abobo Adjame, Lab Thermodynam & Phys Chim Milieu, Abidjan 02, Cote Ivoire

来源：

CATALYSIS COMMUNICATIONS | 2010年 / 12卷 / 02期

关键词：

Mesoporous titania nanocomposite; Anatase; Platinum; Cyclohexane dehydrogenation; SMSI effect; METAL-SUPPORT INTERACTIONS; BIMETALLIC RH-GE; SELECTIVE HYDROGENATION; CITRAL HYDROGENATION; PHOTOCATALYTIC ACTIVITY; SURFACE-AREA; TIO2; ADSORPTION; DECOMPOSITION; PALLADIUM;

D O I：

10.1016/j.catcom.2010.08.010

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：

Platinum based mesostructured SiO2 supported TiO2 nanoclusters (TiO2 content ranging from W to 50 wt %) were synthesized and characterized Titania nanodomains (<4 nm) dispersed in the silica porosity are obtained Derived 1 wt % Pt/xTiO(2)-SiO2 nanocomposites were tested in the cyclohexane dehydrogenation reaction a structure insensitive reaction to evaluate metal-support interaction Pt/xTiO(2)-SiO2 nanocomposites display largely higher SMSI effect than measured over classical Pt/TiO2 P25 catalyst While platinum particle size is found to be affected by the mania loading in the composite similar SMSI effect is measured for all solids displaying similar TiO2 crystal size Titania crystal size is evidenced as an important parameter allowing a control of the SMSI effect the lower the crystal size the stronger the metal-support interaction (C) 2010 Elsevier B V All rights reserved

引用

页码：86 / 91

页数：6

共 36 条

[1] IMPROVED PHOTOCATALYST OF TIO2/SIO2 PREPARED BY A SOL-GEL SYNTHESIS [J].