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Synthesis, Characterization and Catalysis of Ce‐MCM‐41
Author(s) -
Chien ShuHua,
Kuo MingChih,
Chen ChunLong
Publication year - 2005
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200500103
Subject(s) - mcm 41 , mesoporous material , chemistry , catalysis , cerium , hydrothermal circulation , chemical engineering , transmission electron microscopy , hexagonal crystal system , adsorption , specific surface area , bet theory , crystallography , nuclear chemistry , inorganic chemistry , organic chemistry , engineering
Abstract The cerium‐containing MCM‐41 (Ce‐MCM‐41) has been synthesized by direct hydrothermal method. The low‐angle XRD patterns revealed the typical five major peaks of MCM‐41 type hexagonal structures. The interplanar spacing d 100 = 38.4 Å was obtained that can be indexed on a hexagonal unit cell parameter with a o = 44.3 Å which was larger than that of pure siliceous MCM‐41 (Si‐MCM‐41). Transmission electron micrograph shows the regular hexagonal array of uniform channel characteristics of MCM‐41. The BET surface area of Ce‐MCM‐41 was 840 m 2 /g, which is much reduced as compared to that of Si‐MCM‐41, with the pore size of 26.9 Å and mesopore volume of 0.78 cm 3 /g were measured by nitrogen adsorption‐desorption isotherm at 77 K. Along with the results, the synthesized Ce‐MCM‐41 exhibited a well‐ordered MCM‐41‐type mesoporous structure with the incorporation of cerium. Using Ce‐MCM‐41 as a support, the Rh (0.5 wt%) catalyst exhibited very high activity for the NO/CO reactions.