Platinum nanoparticles incorporated in mesoporous silica SBA-15 by the deposition-precipitation method

被引：5

作者：

Chytil, Svatopluk ^{[1
]}

Glomm, Wilhelm R. ^{[1
]}

Kvande, Ingvar ^{[1
]}

Zhao Tiejun ^{[1
]}

Blekkan, Edd A. ^{[1
]}

机构：

[1] Norwegian Tech Univ Sci & Technol NTNU, Dept Chem Engn, NO-7491 Trondheim, Norway

来源：

SCIENTIFIC BASES FOR THE PREPARATION OF HETEROGENEOUS CATALYSTS, PROCEEDINGS OF THE 9TH INTERNATIONAL SYMPOSIUM | 2006年 / 162卷

关键词：

D O I：

10.1016/S0167-2991(06)80947-X

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 deposition precipitation (DP) method has been successfully applied in order to functionalize the mesoporous silica SBA-15 with platinum. [Pt(NH3)(4)](OH)(2) was used as the platinum precursor. The applicability of the SBA-15 for the DP is discussed in terms of sufficient hydrothermal stability, and the SBA-15, prepared at 100 degrees C was found to be a suitable support. The impact of the impregnation was monitored by means of N-2 adsorption-desorption and X-ray diffraction measurements. Platinum surface species coexisting with platinum nanoparticles on impregnated solids after a mild calcination at 300 degrees C was detected by UV-Vis diffuse reflectance. Reduction of the bulk surface specie occurs at 60 degrees C whilst a dispersive phase, which interacts stronger with the support, is reduced at around 120 degrees C as shown by Temperature-Programmed-Reduction (TPR).

引用

页码：513 / 520

页数：8

共 20 条

[1] THE ROLE OF PREPARATIVE VARIABLES ON THE SURFACE-COMPOSITION OF SUPPORTED PT-RU BIMETALLIC CLUSTERS [J].

ALERASOOL, S ;

BOECKER, D ;

REJAI, B ;

GONZALEZ, RD ;

DELANGEL, G ;

AZOMOSA, M ;

GOMEZ, R .

LANGMUIR, 1988, 4 (05) :1083-1090

[2] Platinum nanoparticles encapsulated in mesoporous silica:: Preparation, characterisation and catalytic activity in toluene hydrogenation [J].

Chytil, S ;

Glomm, WR ;

Vollebekk, E ;

Bergem, H ;

Walmsley, J ;

Sjöblom, J ;

Blekkan, EA .

MICROPOROUS AND MESOPOROUS MATERIALS, 2005, 86 (1-3) :198-206

[3]

CHYTIL S, UNPUB

[4] True microporosity and surface area of mesoporous SBA-15 silicas as a function of synthesis temperature [J].

Galarneau, A ;

Cambon, H ;

Di Renzo, F ;

Fajula, F .

LANGMUIR, 2001, 17 (26) :8328-8335

[5] Microporosity and connections between pores in SBA-15 mesostructured silicas as a function of the temperature of synthesis [J].

Galarneau, A ;

Cambon, N ;

Di Renzo, F ;

Ryoo, R ;

Choi, M ;

Fajula, F .

NEW JOURNAL OF CHEMISTRY, 2003, 27 (01) :73-79

[6]

GEUS, 1999, PREPARATION SOLID CA, P460

[7] Platinum-oxide species formed on progressive oxidation of platinum crystallites supported on silica and silica-alumina [J].

Hwang, CP ;

Yeh, CT .

JOURNAL OF CATALYSIS, 1999, 182 (01) :48-55

[8] Impact of aqueous impregnation on the long-range ordering and mesoporous structure of cobalt containing MCM-41 and SBA-15 materials [J].

Khodakov, AY ;

Zholobenko, VL ;

Bechara, R ;

Durand, D .

MICROPOROUS AND MESOPOROUS MATERIALS, 2005, 79 (1-3) :29-39

[9] REACTIONS OF PLATINUM IN OXYGEN-TREATED AND HYDROGEN-TREATED PT-GAMMA-AL2O3 CATALYSTS .2. ULTRAVIOLET VISIBLE STUDIES, SINTERING OF PLATINUM, AND SOLUBLE PLATINUM [J].

LIETZ, G ;

LIESKE, H ;

SPINDLER, H ;

HANKE, W ;

VOLTER, J .

JOURNAL OF CATALYSIS, 1983, 81 (01) :17-25

[10] ADSORPTION OF PLATINUM COMPLEXES ON SILICA AND ALUMINA - PREPARATION OF NONUNIFORM METAL DISTRIBUTIONS WITHIN SUPPORT PELLETS [J].

MANG, T ;

BREITSCHEIDEL, B ;

POLANEK, P ;

KNOZINGER, H .

APPLIED CATALYSIS A-GENERAL, 1993, 106 (02) :239-258

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