SUPPORTED PLATINUM-TIN CATALYSTS - THE IDENTIFICATION BY SN-119 MOSSBAUER-SPECTROSCOPY OF THE UNUSUAL OXIDATION OF TIN DURING PRETREATMENT UNDER REDUCING CONDITIONS

被引：2

作者：

BERRY, FJ

ZHANG, T

机构：

[1] School of Chemistry, University of Birmingham, Birmingham, B15 2TT

来源：

HYPERFINE INTERACTIONS | 1991年 / 67卷 / 1-4期

关键词：

D O I：

10.1007/BF02398198

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Titania-supported platinum-tin hydrocarbon dehydrogenation catalysts formed by initial treatment in air contain Sn4+ which is reduced by low temperature treatment in hydrogen to Sn2+. Subsequent exposure to the reducing atmosphere at moderate temperatures results in the reoxidation of some of the Sn2+ species. Continued treatment at elevated temperatures gives rise to the formation of a platinum-tin alloy. The unusual behaviour of titania-supported platinum-tin described in this work resembles results previously recorded from other titania-supported bimetallic catalysts containing iron and Group VIII precious metals.

引用

页码：543 / 547

页数：5

共 11 条

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