Synthesis and microscopic characterization of dendrimer-derived Ru/Al2O3 catalysts

被引:43
作者
Lafaye, G [1 ]
Williams, CT [1 ]
Amiridis, MD [1 ]
机构
[1] Univ S Carolina, Swearingen Engn Ctr, Dept Chem Engn, Columbia, SC 29208 USA
基金
美国国家科学基金会;
关键词
PAMAM dendrimer; ruthenium; nanoparticles; catalysts;
D O I
10.1023/B:CATL.0000029527.72413.e1
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
Fourth generation poly(amidoamine) dendrimers have been used to template and stabilize Ru nanoparticles in solution. UV-visible spectroscopic results indicate that Ru3+ ions from a RuCl3 precursor can complex with functional groups within the dendrimer structure. Subsequent reduction of the Ru3+ ions yields finely dispersed Ru nanoparticles with a narrow particle size distribution. These dendrimer-stabilized nanoparticles were deposited onto an alumina support and thermally activated to remove the dendrimer "shell'', as indicated by in situ Fourier transform infrared (FTIR) spectroscopic measurements. High resolution transmission electron microscopy (HRTEM) measurements indicate that the resulting Ru/Al2O3 catalyst has a smaller mean metal particle size and a narrower particle size distribution than a similar catalyst prepared by a traditional wet impregnation from the same RuCl3 precursor.
引用
收藏
页码:43 / 47
页数:5
相关论文
共 28 条
[1]   CATALYTIC AND STRUCTURAL-PROPERTIES OF RUTHENIUM BIMETALLIC CATALYSTS - EFFECTS OF PRETREATMENT ON THE BEHAVIOR OF VARIOUS RU/AL2O3 CATALYSTS IN ALKANE HYDROGENOLYSIS [J].
BOND, GC ;
SLAA, JC .
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 1995, 96 (02) :163-173
[2]   STUDIES ON RUTHENIUM CATALYSTS .4. HYDROGENOLYSIS OF N-BUTANE ON RU/AL2O3 CATALYST-DEPENDENCE OF REACTION-KINETICS ON PARTICLE-SIZE AND ON PRETREATMENT [J].
BOND, GC ;
SLAA, JC .
JOURNAL OF MOLECULAR CATALYSIS, 1994, 89 (1-2) :221-228
[3]   In situ FTIR studies of the selective catalytic reduction of NO by C3H6 over Pt/Al2O3 [J].
Captain, DK ;
Amiridis, MD .
JOURNAL OF CATALYSIS, 1999, 184 (02) :377-389
[4]   Pt-Pd bimetallic nanoparticles encapsulated in dendrimer nanoreactor [J].
Chung, YM ;
Rhee, HK .
CATALYSIS LETTERS, 2003, 85 (3-4) :159-164
[5]  
Crooks RM, 2001, TOP CURR CHEM, V212, P81
[6]   Dendrimer-encapsulated metal nanoparticles: Synthesis, characterization, and applications to catalysis [J].
Crooks, RM ;
Zhao, MQ ;
Sun, L ;
Chechik, V ;
Yeung, LK .
ACCOUNTS OF CHEMICAL RESEARCH, 2001, 34 (03) :181-190
[7]   INFRARED STUDY OF COKE ON ALUMINA AND ZEOLITE [J].
DATKA, J ;
SARBAK, Z ;
EISCHENS, RP .
JOURNAL OF CATALYSIS, 1994, 145 (02) :544-550
[8]   XPS and FTIR study of Ru/Al2O3 and Ru/TiO2 catalysts:: Reduction characteristics and interaction with a methane-oxygen mixture [J].
Elmasides, C ;
Kondarides, DI ;
Grünert, W ;
Verykios, XE .
JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (25) :5227-5239
[9]   Selective hydrogenation of α,β-unsaturated aldehydes [J].
Gallezot, P ;
Richard, D .
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1998, 40 (1-2) :81-126
[10]   Ru/ZrO2 catalysts I.: O2, CO, and NO adsorption and reactivity [J].
Guglielminotti, E ;
Boccuzzi, F ;
Manzoli, M ;
Pinna, F ;
Scarpa, M .
JOURNAL OF CATALYSIS, 2000, 192 (01) :149-157