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Regulation of SBA‐15, γ‐Al 2 O 3 , ZSM‐5 and MgO on Molybdenum oxide and Consequent Effect on DME Oxidation Reaction
Author(s) -
Zhang Zhenzhou,
Zhang Qingde,
Jia Lingyu,
Wang Wenfeng,
Gao Xiaofeng,
Gu Yingying,
Gao Xiujuan,
Han Yizhuo,
Tan Yisheng
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601293
Subject(s) - molybdenum , oxygen , octahedron , inorganic chemistry , chemistry , oxide , formaldehyde , zsm 5 , methanol , lewis acids and bases , brønsted–lowry acid–base theory , catalysis , molybdenum oxide , crystallography , crystal structure , zeolite , organic chemistry
MoO 3 supported on SBA‐15, γ‐Al 2 O 3 , ZSM‐5 and MgO were prepared in this paper, the regulation of the support on the molybdenum oxide was explored. When the same molar ratio of MoO 3 was loaded, three dimensional MoO 3 were formed only over SBA‐15, γ‐Al 2 O 3 and ZSM‐5, while MoO x domains were detected over MgO. Mo 6+ species detected on SBA‐15, γ‐Al 2 O 3 , ZSM‐5 and MgO were almost at the same binding energy position while surface oxygen species detected on the surface were obviously at different position of binding energy. The amount of lattice oxygen predominates in the surface oxygen species of MoO 3 ‐γ‐Al 2 O 3 and MoO 3 ‐MgO while the surface hydroxyl groups have most amounts in MoO 3 ‐SBA‐15 and MoO 3 ‐ZSM‐5. The surface acid property of the support rather than pH value of impregnating solution makes more contributions to governing the ratio of tetrahedral or octahedral molybdenum oxide. High content of lattice oxygen and more amounts of Lewis acid in γ‐Al 2 O 3 are apt to form formaldehyde, and high content of surface hydroxyl group and more amounts of Bronsted acid sites in ZSM‐5 are in favor of the formation of methanol.