期刊
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
卷 19, 期 15-17, 页码 2496-2501出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217979205031213
关键词
gold catalysts; nanoparticles; zeolites; UV-visible spectroscopy; XPS; XRD; HRTEM
The present work is devoted to the study of some properties (size, electronic state, redox properties, interaction with matrix) of gold clusters and nanosized particles in Na-Y zeolite modified by iron. Two methods of iron introduction were applied: wet-impregnation and ion-exchange, which result in different structure and reducibility of iron species. Aggregation of iron species and their probable dissolution during gold deposition in samples prepared by wet-impregnation permits to form new An, Fe and Au-Fe species in contrast to samples prepared by ion-exchange. The strong interaction of An with Fe species in Au/Fe-imp/NaY changes noticeably a behavior of gold nanoparticles under heating.
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