Solid-state thermal transformations in mixtures of platinum(II) tetraammine with ammonium chromate and ammonium dichromate


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Abstract

Thermal transformations of 3[Pt(NH3)4]Cl2–(NH4)2CrO4 (I) and 3[Pt(NH3)4]Cl2–2(NH4)2Cr2O7 (II) mixtures in a solid state have been studied by thermal analysis and mass spectrometry in an inert (Ar) atmosphere and air at temperatures from 40 to 550°C. The chemical and phase compositions of the thermolysis products obtained in argon have been determined: Pt and Cr2O3 in mixture I and Pt, a platinum-based Pt1 – yCry solid solution, and Cr2O3 in mixture II. The thermal transformation products of mixtures I and II in air consist of two phases: Pt and Cr2O3. It has been shown that interactions in the mixtures proceed through the formation of a metallic chromium phase. The materials obtained in this study can find application as catalysts for low-temperature fuel cells, as well as for organic synthesis processes.

About the authors

E. V. Fesik

Samara National Research University; Reaviz Medical University

Author for correspondence.
Email: 1707-fesik@mail.ru
Russian Federation, Moskovskoe sh. 34, Samara, 443086; Chapaevskaya ul. 227, Samara, 443001

T. M. Buslaeva

Institute of Fine Chemical Technologies

Email: 1707-fesik@mail.ru
Russian Federation, pr. Vernadskogo 86, Moscow, 119571

T. I. Mel’nikova

Chemical and Ecological Education Promotion Nonprofit Partnership

Email: 1707-fesik@mail.ru
Russian Federation, Krivokolennyi per. 12/1, Moscow, 101848

L. S. Tarasova

Krasnoyarsk Scientific Center, Siberian Branch

Email: 1707-fesik@mail.ru
Russian Federation, Akademgorodok 50, Krasnoyarsk, 660036

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