Высокопроизводительные каталитические пленки PdZn и PdAg для полугидрирования 2-метил-3-бутин-2-ола в проточном микрореакторе

Синтез активного, селективного и стабильного каталитического покрытия является сложной задачей для полугидрирования алкенолов в проточном микрореакторе, что является потенциально эффективной стратегией для производства алкенолов в тонком органическом синтезе. В этой работе каталитические пленки PdMe/TiO2 (Me = Zn, Ag) были получены с помощью простого и эффективного темплатного золь-гель метода и использованы в полугидрировании 2-метил-3-бутин-2-ола. Приготовленные биметаллические каталитические пленки PdMe/TiO2 (Me = Zn, Ag) показали высокую каталитическую селективность благодаря образованию сплавных наночастиц (НЧ) PdZn и PdAg. Поверхность активного центра PdAg изменяется в условиях реакции. PdZn-пленка демонстрирует лучшую каталитическую эффективность. Допирование носителя цинком увеличивает селективность и стабильность пленок. Анализ рентгеновских фотоэлектронных спектров показал, что допированная цинком пленка PdZn/Ti0,8Zn0,2O1,8 имеет более высокую концентрацию активных центров PdZn и лучшую устойчивость к окислению, чем PdZn/TiO2. Каталитические пленки PdAg/TiO2 и PdZn/Ti0,8Zn0,2O1,8 продемонстрировали высокую стабильность при длительных испытаниях.

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