• nickel nanoparticles embedded in the framework of mesoporous tio2: efficient and highly stable catalysts for hydrodechlorination of chlorobenzene

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1247
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     mesoporous tio2-supported metallic ni catalysts were prepared through a multicomponent assembly approach, where surfactant, titania, and nickel precursor were cooperatively assembled in a one-pot process. with the characterization of transmission electron microscopy, x-ray photoelectron spectroscopy, x-ray diffraction, n2 physisorption, hydrogen temperature-programmed reduction, and hydrogen temperature-programmed desorption, the resultant ni nanoparticles were identified to be homogenously embedded within the framework of tio2 ranging in size from 1 to 6 nm. the embedment of ni within the framework of support resulted in larger interface between ni and support and thus stronger ni–tio2interaction. during the gas-phase hydrodechlorination of chlorobenzene reaction, the as-prepared 0.23%-ni/tio2-ds delivered turnover frequency up to 1.5 times greater than that associated with the reference ni/tio2 catalyst prepared by conventional incipient-wetness impregnation method. meanwhile, the as-prepared 0.23%-ni/tio2-ds also exhibited much improved stability for a continuous reaction of 30 h than the reference catalyst. the remarkable enhancement of the catalytic performances was found to depend on the strong metal–support interaction.

سوال خود را در مورد این مقاله مطرح نمایید :

با انتخاب دکمه ثبت پرسش، موافقت خود را با قوانین انتشار محتوا در وبسایت تی پی بین اعلام می کنم
مقالات جدیدترین رویدادها
مقالات جدیدترین ژورنال ها