193Ir Mössbauer study of bimetallic platinum-iridium catalysts |
| |
| Authors: | F. E. Wagner J. A. Sawicki J. H. Rolston |
| |
| Affiliation: | (1) Physics Department, Technical University of Munich, D-8046 Garching, Germany;(2) Chalk River Nuclear Laboratories, K0J1J0 Chalk River, Ontario, Canada |
| |
| Abstract: | ![]()
Using the 73.0 keV Mössbauer resonance in193Ir, the chemical form of iridium in bimetallic Pt?Ir catalysts supported on amorphous silica has been determined after ionic co-exchange, calcination and reduction in hydrogen. The compositions of the highly dispersed bimetallic Pt1?xIrx clusters as determined from the measured isomer shifts reveal a strong tendency for segregation of iridium and platinum. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
