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Hollow Structure and Electron Promotion Effect of Mesoporous Pd/CeO 2 Catalyst for Enhanced Catalytic Hydrogenation
Author(s) -
Wei Qinhong,
Ma Qingxiang,
Zuo Pingping,
Fan Huailin,
Qu Shijie,
Shen Wenzhong
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201701457
Subject(s) - catalysis , mesoporous material , nitrobenzene , materials science , chemical engineering , ethylbenzene , aniline , styrene , hydrothermal circulation , metal , inorganic chemistry , chemistry , composite material , organic chemistry , metallurgy , polymer , engineering , copolymer
A hollow structured CeO 2 spheres supported metallic Pd catalyst (Pd/CeO 2 ‐H) was designed and prepared by a glucose hydrothermal method and impregnation method. The CeO 2 ‐H consisted of an inner hollow cavity and an outer shell on which a large number of mesopores were formed. The Pd/CeO 2 ‐H hollow sphere catalyst, which presented abundant surface oxygen vacancies, was investigated for catalytic hydrogenations of styrene and nitrobenzene to produce ethylbenzene and aniline. Activity tests indicated that the mesoporous Pd/CeO 2 ‐H hollow sphere catalyst exhibited striking catalytic activity, which was attributed to the spatial core–shell structure that provided more active sites and facilitated reactant diffusion as well as surface defects (oxygen vacancies), which were capable of transferring electrons to metallic Pd. All of these advances are beneficial to give a higher catalytic hydrogenation performance.