Controlled preparation and characterization of Pt-Rh/Al2O3 bimetallic catalysts for reactions in reducing conditions

被引：14
|
作者：
Herault, Nelly [1 ]
Olivet, Lilian [1 ]
Pirault-Roy, Laurence [1 ]
Especel, Catherine [1 ]
Vicerich, Maria A. [2 ]
Pieck, Carlos L. [2 ]
Epron, Florence [1 ]
机构：
[1] Univ Poitiers, CNRS UMR7285, Inst Chim Milieux & Mat Poitiers, B27,TSA 51106,4 Rue Michel Brunet, F-86073 Poitiers 9, France
[2] FIQ UNL, Inst Invest Catalisis & Petroquim INCAPE, CONICET, Colectora Ruta Nac 168 Km 0, RA-3000 Santa Fe, Argentina
来源：
APPLIED CATALYSIS A-GENERAL | 2016年 / 517卷
关键词：
Bimetallic supported catalysts; Pt-Rh; Cyclohexane dehydrogenation; FTIR of CO; FTIR of NO-CO; MODEL 3-WAY CATALYSTS; SURFACE-COMPOSITION; SUPPORTED PLATINUM; PARTICLE-SIZE; NOBLE-METALS; RHODIUM; CO; RECONSTRUCTION; NO; DEHYDROGENATION;
D O I：
10.1016/j.apcata.2016.02.024
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：
Pt-Rh bimetallic catalysts on alumina support were prepared according to three different techniques, one leading to random deposition of the two metals at the support's surface, the two others, namely the organometallic grafting and the colloidal route, favoring the formation of bimetallic particles with strong Pt-Rh interactions. Catalysts were characterized by ICP, H-2 chemisorption, TPR, FTIR of chemisorbed CO and NO-CO. Then they were evaluated in cyclohexane dehydrogenation and methylcyclopentane hydrogenolysis reactions. Strong interaction between Pt and Rh was demonstrated for catalysts prepared by controlled preparation method, which leads to a strong synergetic effect for methylcyclopentane ring opening, in terms of activity and selectivity, whereas these interactions do not play a role in cyclohexane dehydrogenation. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：81 / 90
页数：10
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