2026-10-10T22:00:51Z https://www.scidb.cn/oai

10.57760/sciencedb.j00124.00552 2026-07-06T22:11:53Z

2026-07-06 Catalytic performance of ZIF-derived metal catalysts for dimethyl carbonate synthesis from methanol doi:10.57760/sciencedb.j00124.00552 en A series of M-ZIF-8 precursors were synthesized by doping different metal species (M = Fe, Ni, Mn, Ce, In) and then converted into M-NC catalysts via high-temperature carbonization. The catalytic performance of the M-NC catalysts for dimethyl carbonate (DMC) synthesis through oxidative carbonylation of methanol was investigated. All as-synthesized precursors maintained the characteristic structure of ZIF-8. After carbonization at 950 ℃, the Fe-NC and the supported Fe/NC*-950 catalyst displayed diffraction peaks corresponding to metallic Fe0, Fe2O3 and Fe3O4. Differently, Fe-NC shows Fe-N coordination sites, while the other M-NC samples exhibited amorphous structure. For Fe/NC catalyst and Fe/NC* catalysts with varied Fe loadings prepared by the impregnation method, only the diffraction signals of Fe3O4 were detected. Both Fe-NC and Fe/NC*-950 show that the methanol conversion reached 4.5%, while the Fe-NC exhibited higher DMC selectivity (98.3%) than the Fe/NC*-950 (96.2%). By contrast, the methanol conversion over Fe/NC, Fe/NC* and other M-NC catalysts was all lower than 1%. Increasing the total reaction pressure or temperature could effectively promote the methanol conversion, and the DMC selectivity was hardly affected by reaction pressure; however, increasing reaction temperature accelerated side reactions and decreased DMC selectivity. The apparent activation energy of Fe-NC was found to be 30.1 kJ·mol–1, much lower than that of conventional copper-based catalysts for this reaction. This study presents a novel approach to design and application of iron-based catalysts in oxidative carbonylation and hydroformylation of methanol. methanol; dimethyl carbonate; ZIF-derived metal catalyst; iron-based catalyst; Fe-N coordination ZHANG Meng MENG Fanhui LIU Yufan ZHENG Huiling LI Haojie LI Zhong EMBARGO https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank