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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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In this work we investigated the thermal decomposition of the complex PtZn(CH3COO)4(H2O)(CH3COOH)2 in reductive atmosphere to find the optimum conditions for formation of the bimetallic PtZn nanoparticles. According to in situ XAFS, the decomposition of unsupported PtZn acetate complex starts from 100°С with formation of metallic platinum, while zinc remains in oxygen environment (fig.1). The structure rearrangement of Pt fcc lattice to tetragonal PtZn intermetallic phase occurs after complete zinc reduction (~275°C). After 300°C only an increase in particle size of PtZn nanoparticles is observed. Based on these data, the optimum temperature (300°C) for the preparation of bimetallic Pt-Zn/Al2O3 catalyst was selected. The obtained supported sample showed high activity in the model reaction of selective diphenylacetylene hydrogenation.