Mechanistic in situ investigation of heterogeneous hydrogenation over Rh/TiO2catalysts: Selectivity, pairwise route and catalyst nature

Ekaterina V. Pokochueva, Dudari B. Burueva, Larisa M. Kovtunova, Andrey V. Bukhtiyarov, Alexei Yu Gladky, Kirill V. Kovtunov, Igor V. Koptyug, Valerii I. Bukhtiyarov

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

4 Цитирования (Scopus)

Аннотация

The selectivity of product formation is strongly correlated with the nature of the catalyst active centers. Therefore, the selective synthesis of active sites with certain structure is a big challenge in modern catalysis. Here synthetic procedures are adopted for the formation of 1% Rh/TiO2 catalysts with different properties. It is shown that the nature of the precursor used for catalyst preparation is important, and that the use of a solution of rhodium acetate instead of rhodium nitrate leads to the selective formation of butenes during 1,3-butadiene hydrogenation. The use of parahydrogen in the reaction results in the enhancement of NMR signals via parahydrogen-induced polarization (PHIP) for all synthesized catalysts, and this signal enhancement increases with increasing catalyst calcination temperature. This effect is explained by the decoration of rhodium nanoparticles with titania which restricts hydrogen mobility on the surface, leading to the highest reported to date selectivity toward the pairwise hydrogen addition route of 7% for supported metal catalysts. This journal is

Язык оригиналаанглийский
Страницы (с-по)161-175
Число страниц15
ЖурналFaraday Discussions
Том229
DOI
СостояниеОпубликовано - фев 2021

Предметные области OECD FOS+WOS

  • 3.02 КЛИНИЧЕСКАЯ МЕДИЦИНА
  • 1.04 ХИМИЧЕСКИЕ НАУКИ

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