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Дата последнего поиска статьи во внешних источниках: 30 апреля 2021 г.
Аннотация:Abstract—The composition and structure of the surface phases of catalysts based on Pt, Ni, and Cr (platinum,bi- and trimetallic) supported on a Sibunit support are studied via TEM and EDS. The structure of the catalysts before and after reductive hydrogenation are compared. It is found that the metal in the Pt/C system is in a highly dispersed state, mainly in an oxidized form. In double and ternary catalysts, the surface containsmetallic and oxide components; on the surface of Pt–Ni catalyst, the metal phase is more pronounced than with Ni–Cr and Pt–Ni–Cr. Nickel-based catalysts contain large metal particles (up to 30 nm). After reductive hydrogenation, an increase in dispersion and a reduction in the crystallinity of metal particles is observed in all of the studied systems.