Journal
INTERMETALLICS
Volume 132, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2021.107160
Keywords
Alloys; Intermetallic compound; Materials characterization; Nanocomposites; Phase transformation; Synchrotron X-Ray diffraction
Categories
Funding
- Russian Science Foundation [18-73-10206, 19-13-00285]
- Russian Foundation for Basic Research [18-03-00228]
- IGIC RAS state assignment
- Russian Science Foundation [19-13-00285] Funding Source: Russian Science Foundation
Ask authors/readers for more resources
This study thoroughly investigates the phase transformations of a newly synthesized heterobimetallic acetate in a chemically reductive atmosphere, with a focus on optimizing conditions for the formation of nanostructured PtZn intermetallic compound. Through a two-stage process, the formation of ordered PtZn intermetallic compound with a tetragonal structure is achieved in a narrow temperature range. The results provide insight into the optimum reduction temperature for the preparation of supported bimetallic Pt?Zn/Al2O3 catalyst.
Phase transformations of a newly synthesized heterobimetallic ZnPt(OOCMe)4(H2O)(MeCOOH)2 acetate in a chemically reductive atmosphere at mildly elevated temperatures are thoroughly studied in order to optimize conditions for the formation of nanostructured PtZn intermetallic compound. According to XAFS and XRD data, the first stage of reductive thermolysis is the reduction of the noble metal, while zinc remains in an oxygen environment. At the second stage the reduction of Zn and the formation of the bimetallic solid solution with the fcc lattice occur. It is shown that recrystallization of solid solution to ordered PtZn intermetallic compound with the tetragonal structure occurs in a narrow temperature range of 250?275 ?C. Based on these results, the optimum reduction temperature for the preparation of supported bimetallic Pt?Zn/Al2O3 catalyst was determined to be 300 ?C. Results of catalytic tests of the supported material are reported.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available