EFFECT OF CHLORIDE ON SINTERING OF PT/AL2O3 CATALYSTS

被引：22
作者：
BARBIER, J
BAHLOUL, D
MARECOT, P
机构：
来源：
CATALYSIS LETTERS | 1991年 / 8卷 / 5-6期
关键词：
PLATINUM; ALUMINA; OXICHLORIDE; OXIDATION; SINTERING;
D O I：
10.1007/BF00764194
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：
Reduced Pt/Al2O3 catalysts with different chloride contents were treated at different temperatures under oxygen flow. TPR and TPD studies of oxidized species show that at low Cl/Pt atomic ratio (less-than-or-equal-to 1) PtO2 is formed at low temperature (400-500 K) and is totally decomposed (900 K) yielding reduced metallic Pt and inducing metal sintering. At high Cl/Pt atomic ratio (greater-than-or-equal-to 6) formation of stable (up to 1000 K) platinum oxichloride avoids metal sintering.
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页码：327 / 334
页数：8
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