Alloy formation in supported PtSn catalysts: Mossbauer studies

摘要: A series of materials that contained 1 wt% Pt and Pt: Sn atomic ratios varying from : to 8 were prepared. These metals supported on alumina (100 or 250 m2/g) silica (700 M2/g). For both supports, the fraction was present in an alloy increased with increasing tin content; data are consistent with, but do not require, a composition PtSn. these materials, zero valent is more easily obtained following reduction hydrogen when used as support. Mossbauer alone indicate richer than PtSn support; however, combined XRD formed additional being “metallic” state.