학술논문
Exafs evidence for direct Rh-Tan+ bonding and coverage of the metal particles in a Rh/Ta2 O5 SMSI catalyst
Document Type
Article
Source
Catalysis Letters; July 1989, Vol. 2 Issue: 4 p211-218, 8p
Subject
Language
ISSN
1011372X; 1572879X
Abstract
An EXAFS investigation showed that the rhodium particles in a Rh/Ta2 O5 catalyst were fully reduced and in the ‘normal’ state after reduction in H2 at 523 K. After reduction at 858 K, in the SMSI state, tantalum ions could be detected in the reduced supporting oxide directly underneath the rhodium metal particles and in tantalum oxide covering the rhodium metal particles. Neither alloy formation, nor the formation of raftlike structures was observed.