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Atmospheric Selective Oxidation of Benzyl Alcohol Catalyzed by Pd Nanoparticles Supported on CeO 2 with Various Morphologies
Author(s) -
Zheng Huan,
Wei ZhiHang,
Hu XiaoQian,
Xu Jie,
Xue Bing
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201900757
Subject(s) - benzyl alcohol , catalysis , benzaldehyde , palladium , x ray photoelectron spectroscopy , materials science , yield (engineering) , adsorption , nanoparticle , microporous material , chemical engineering , desorption , nuclear chemistry , organic chemistry , chemistry , nanotechnology , metallurgy , composite material , engineering
A series of ceria materials with various morphologies including rod, polyhedron, cube, and mesostructures, have been synthesized and employed as catalyst supports to load palladium. The physicochemical properties of the synthesized materials have been characterized by XRD, N 2 adsorption–desorption, TEM, XPS, and O 2 ‐TPD techniques. The results show Pd can be well dispersed on the ceria supports, whereas Pd/CeO 2 materials possess different proportion of oxidic Pd (Pd 2+ ) and Ce 3+ species. In the liquid‐phase selective oxidation of benzyl alcohol using O 2 as an oxidant, Pd/CeO 2 ‐poly demonstrates the highest catalytic activity, affording a maximum yield of benzaldehyde up to 87% under 90 °C. According characterization analysis, the combination of more Ce 3+ species and higher proportion of Pd 2+ as well as O 2 ‐activating ability are responsible for the high catalytic activity of Pd/CeO 2 ‐poly.