CHARACTERIZATION OF SN DOPED NI/AL2O3 STEAM REFORMING CATALYSTS BY XPS

被引：25
|
作者：
PADESTE, C [1 ]
TRIMM, DL [1 ]
LAMB, RN [1 ]
机构：
[1] UNIV NEW S WALES,SCH CHEM,KENSINGTON,NSW 2033,AUSTRALIA
来源：
CATALYSIS LETTERS | 1993年 / 17卷 / 3-4期
关键词：
STEAM REFORMING CATALYSTS; SN DOPED NI/AL2O3; SURFACE SEGREGATION OF TIN; XPS OF SN/NI MIXTURES;
D O I：
10.1007/BF00766156
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：
XPS measurements have shown that tin oxides are more readily reduced to metallic tin by hydrogen in Ni/Al2O3 systems than on pure Al2O3. During the reductive activation of Sn doped Ni/Al2O3 catalysts, surface segregation of the dopant was observed. This finding may explain that tin enhances the selectivity of the steam reforming catalysts only when added in very low concentrations and that it acts as a poison at higher loadings.
引用
收藏
页码：333 / 339
页数：7
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