193Ir and 57Fe Mössbauer characterisation of iridium/iron bimetallic catalysts for methanol synthesis

被引：0
|
作者：
Lorenzo Stievano
机构：
[1] Università Ca' Foscari,Dipartimento di Chimica Fisica
来源：
Hyperfine Interactions | 2000年 / 126卷
关键词：
Iridium; Inorganic Salt; Bimetallic Catalyst; Methanol Synthesis; Cluster Compound;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Fe-Ir/MgO catalysts derived from the [Et4N]2[Fe2Ir2(CO)12] cluster precursor, which exhibit a high activity in the synthesis of methanol from CO and H2, were studied by 193Ir and 57Fe Mössbauer spectroscopy. The study extends from the precursors via the fresh to the aged catalysts. The presence of iridium in the metallic state as well as the presence of trivalent, divalent and alloyed iron is detected. The different structural features of catalysts prepared from mixed-metal cluster compounds and from inorganic salt precursors are discussed.
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页码：101 / 106
页数：5
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