New insight into the support effect on HDS catalysts: evidence for the role of Mo-support interaction on the MoS2 slab morphology

被引：66

作者：

Garcia, Elizabeth Dominguez ^{[1
]}

Chen, Jianjun ^{[1
,2
]}

Oliviero, Erwan ^{[3
]}

Oliviero, Laetitia ^{[1
]}

Mauge, Francoise ^{[1
]}

机构：

[1] Normandie Univ, ENSICAEN, CNRS, LCS,UNICAEN, F-14000 Caen, France

[2] Fuzhou Univ, Sch Chem Engn, Natl Engn Res Ctr Chem Fertilizer Catalyst, Fuzhou, Fujian, Peoples R China

[3] Univ Montpellier, CC087,Pl Eugene Bataillon, F-34095 Montpellier 5, France

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 260卷

关键词：

Hydrodesulfurization (HDS); Support effect; Molybdenum disulfide (MoS2); Slab morphology; Sulfidation; Infrared (IR) spectroscopy; CO adsorption; Mo edge dispersion; CO ADSORPTION; IR SPECTROSCOPY; ACTIVE PHASE; HYDROTREATING CATALYSTS; ELECTRONIC-PROPERTIES; MOS2/AL2O3; CATALYSTS; SULFIDE CATALYSTS; GEOMETRICAL MODEL; OXIDE CATALYSTS; CITRIC-ACID;

D O I：

10.1016/j.apcatb.2019.117975

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

MoS2 catalysts were prepared on Al2O3, SiO2 and TiO2 support. On the oxidic forms, Raman and UV-vis characterizations show the strong Mo-TiO2 interaction and the weak Mo-SiO2 one that leads to a poorer Mo dispersion. MoS2 nanoparticles were then studied by TEM and adsorption of CO followed by infra-red spectroscopy which allows the distinction and quantification of the two stable edges namely the S- and M- edges. It appears that the slab morphology is strongly modified by the support nature: thus the stronger the MoS2-support interaction the higher the S-/M- edge ratio. Finally, MoS2 morphology impacts the catalytic activity in thiophene HDS: (1) an increase of the S-/M- edge ratio leads to the increase of the TOF value for Mo sulfided supported on Al2O3 and SiO2; (2) a specific behavior with high TOF value of mainly M-edge sites and strong hydrogenating properties is underlined for Mo/TiO2.

引用

页数：12

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