Инд. авторы:	Filatov E.Y., Zadesenets A.V., Komogortsev S.V., Plyusnin P.E., Chepurov A.A., Korenev S.V.
Заглавие:	Study of Co x Pt 1-x nanoalloy formation mechanism via single-source precursors
Библ. ссылка:	Filatov E.Y., Zadesenets A.V., Komogortsev S.V., Plyusnin P.E., Chepurov A.A., Korenev S.V. Study of Co x Pt 1-x nanoalloy formation mechanism via single-source precursors // Powder Diffraction. - 2019. - P.1-5. - ISSN 0885-7156.
Внешние системы:	DOI: 10.1017/S0885715619000162; РИНЦ: 38769106; РИНЦ: 38769106; SCOPUS: 2-s2.0-85065722054; WoS: 000486254100007;
Реферат:	eng: This paper is devoted to the study of formation mechanism of metal solid solutions during the thermolysis of single-source precursors in Co-Pt systems with a wide range of superstructural ordering. It is shown that the thermal decomposition of [Pt(NH 3 ) 4 ][Co(C 2 O 4 ) 2 (H 2 O) 2 ]·2H 2 O salt in helium is critically different from that under hydrogen atmospheres. Thermal degradation under the helium atmosphere is followed by a gradual reduction of platinum and cobalt, and at each thermolysis temperature only one phase is present. At 380 °C an equiatomic Co 0.50 Pt 0.50 solid solution is formed (a = 3.749 (4) Å, Fm-3m space group, V/Z = 13.17 Å 3 , crystallite size: 5-7 nm). When the precursor is decomposed under a hydrogen atmosphere, the process proceeds mainly through the simultaneous reduction of the platinum and cobalt atoms, and at each temperature section two metal phases are present. The formation of the close to equiatomic Co 0.50 Pt 0.50 solid solution (a = 3.782 (4) Å, Fm-3m space group, V/Z = 13.52 Å 3 , crystallite size: 7-9 nm) occurs at 450 °C. The calculations of crystallite sizes are confirmed by transmission electron microscopy data. © International Centre for Diffraction Data 2019.
Ключевые слова:	nanoalloy formation; nanoparticles; platinum; powder diffraction; Ammonia; Binary alloys; Cobalt; Cobalt alloys; Crystallite size; Platinum alloys; Single-source precursor; Simultaneous reduction; Powder diffraction; Nanoalloy; Metal solid solutions; Hydrogen atmosphere; Helium atmosphere; Formation mechanism; Thermolysis; Solid solutions; Platinum; Nanoparticles; Hydrogen; High resolution transmission electron microscopy; Helium; Decomposition; cobalt;
Издано:	2019
Физ. характеристика:	с.1-5