Adsorption of Carbon Monoxide on Dendrimer-Encapsulated Platinum Nanoparticles: Liquid versus Gas Phase

被引：49

作者：

Albiter, Manuel A. ^{[1
]}

Crooks, Richard M. ^{[1
]}

Zaera, Francisco ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 01期

基金：

美国国家科学基金会;

关键词：

ULTRAHIGH-VACUUM; CATALYSIS; SPECTROSCOPY; MONODISPERSE; SELECTIVITY; ELECTRODES; SILICA;

D O I：

10.1021/jz900037x

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 ability of dendrimer-encapsulated platinum nanoparticles (Pt DENs) to adsorb carbon monoxide was contrasted in the gas versus liquid phases by using in situ infrared absorption spectroscopy. It was found that while only limited, weak, and reversible adsorption is possible in the gas phase, extensive and stronger adsorption occurs in the liquid phase, even when the Pt DENs are dispersed inside of the pores of a high surface-area solid. It is speculated that the dendrimer structure may collapse in the gas phase, blocking access to the Pt surface, but may expand and open up in the presence of a proper solvent.

引用

页码：38 / 40

页数：3

共 27 条

[1] Dendritic catalysts and dendrimers in catalysis [J].

Astruc, D ;

Chardac, F .

CHEMICAL REVIEWS, 2001, 101 (09) :2991-3023

[2] INSITU INFRARED-SPECTROSCOPY AT SINGLE-CRYSTAL METAL-ELECTRODES - AN EMERGING LINK BETWEEN ELECTROCHEMICAL AND ULTRAHIGH-VACUUM SURFACE SCIENCE [J].

CHANG, SC ;

WEAVER, MJ .

JOURNAL OF PHYSICAL CHEMISTRY, 1991, 95 (14) :5391-5400

[3] Dendrimers: Solutions For Catalyst Separation and Recycling-A Review [J].

de Jesus, Ernesto ;

Flores, Juan C. .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2008, 47 (21) :7968-7981

[4] Decomposition and activation of Pt-dendrimer nanocomposites on a silica support [J].

Deutsch, DS ;

Lafaye, G ;

Liu, DX ;

Chandler, B ;

Williams, CT ;

Amiridis, MD .

CATALYSIS LETTERS, 2004, 97 (3-4) :139-143

[5] NMR Characterization of Fourth-Generation PAMAM Dendrimers in the Presence and Absence of Palladium Dendrimer-Encapsulated Nanoparticles [J].

Gomez, M. Victoria ;

Giuerra, Javier ;

Velders, Aldrik H. ;

Crooks, Richard M. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (01) :341-350

[6] Sol-gel preparation of supported metal catalysts [J].

Gonzalez, RD ;

Lopez, T ;

Gomez, R .

CATALYSIS TODAY, 1997, 35 (03) :293-317

[7] Dendrimer templates for the formation of gold nanoclusters [J].

Gröhn, F ;

Bauer, BJ ;

Akpalu, YA ;

Jackson, CL ;

Amis, EJ .

MACROMOLECULES, 2000, 33 (16) :6042-6050

[8] Dendrimer templated synthesis of one nanometer Rh and Pt particles supported on mesoporous silica: Catalytic activity for ethylene and pyrrole hydrogenation [J].

Huang, Wenyu ;

Kuhn, John N. ;

Tsung, Chia-Kuang ;

Zhang, Yawen ;

Habas, Susan E. ;

Yang, Peidong ;

Somorjai, Gabor A. .

NANO LETTERS, 2008, 8 (07) :2027-2034

[9] Thermal Chemistry of Tetrakis(ethylmethylamido)titanium on Si(100) Surfaces [J].

Kan, Byung-Chang ;

Boo, Jin-Hyo ;

Lee, Ilkeun ;

Zaera, Francisco .

JOURNAL OF PHYSICAL CHEMISTRY A, 2009, 113 (16) :3946-3954

[10] In situ characterization of adsorbates in solid-liquid interfaces by reflection-absorption infrared spectroscopy [J].

Kubota, J ;

Ma, Z ;

Zaera, F .

LANGMUIR, 2003, 19 (08) :3371-3376

← 1 2 3 →