The state of tin on Pt-Sn/Nb2O5 catalysts

被引：14

作者：

Passos, FB

Aranda, DAG

Schmal, M

机构：

[1] Univ Fed Rio de Janeiro, COPPE, NUCAT, BR-21945970 Rio De Janeiro, Brazil

[2] Univ Fed Fluminense, Dept Engn Quim, BR-24210240 Niteroi, RJ, Brazil

[3] Univ Fed Rio de Janeiro, Escola Quim, BR-21940900 Rio De Janeiro, Brazil

来源：

CATALYSIS TODAY | 2000年 / 57卷 / 3-4期

关键词：

Pt-Sn catalysts; TPR; DSC; niobia;

D O I：

10.1016/S0920-5861(99)00338-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The effect of tin addition on niobia supported catalysts was studied and compared to the properties of alumina supported bimetallic Pt-Sn catalysts. The catalyst surfaces were probed by methylcyclopentane conversion, showing that both the, pres ence of Sn and the reduction of the support caused a decrease in hydrogenolysis activity, favoring the ring enlargement reaction. The thermodynamics of reduction of these systems, evaluated by following the reduction step (temperature programmed reduction - TPR) with a differential scanning calorimeter (DSC), and irreversible Hz and CO uptakes, allowed to conclude that a Pt-Sn alloy is formed on niobia supported catalysts. (C)2000 Elsevier Science B.V. All rights reserved.

引用

页码：283 / 289

页数：7

共 18 条

[1]

[Anonymous], 1982, STUD SURF SCI CATAL

[2] CHARACTERIZATION OF PT-SN BIMETALLIC CATALYSTS SUPPORTED ON ALUMINA AND NIOBIA [J].