IR Spectroscopic Evidence for MoS2 Morphology Change with Sulfidation Temperature on MoS2/Al2O3 Catalyst

被引：34

作者：

Chen, Jianjun ^{[1
]}

Labruyere, Vincent ^{[2
]}

Mauge, Francoise ^{[1
]}

Quoineaud, Anne-Agathe ^{[2
]}

Hugon, Antoine ^{[2
]}

Oliviero, Laetitia ^{[1
]}

机构：

[1] Univ Caen Basse Normandie, ENSICAEN, Catalyse & Spectrochim Lab, CNRS, F-14050 Caen, France

[2] IFP Energies Nouvelles, Rond Point Echangeur Solaize, F-69360 Solaize, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 51期

关键词：

CHEMICAL-POTENTIAL ANALYSIS; CO ADSORPTION; CITRIC-ACID; 100; SURFACE; AB-INITIO; M-EDGE; REDUCTION; SULFUR; SITES; DFT;

D O I：

10.1021/jp510470g

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：

Low temperature CO adsorption followed by IR spectroscopy (IR/CO) characterization was used to depict the MoS2 morphology change with sulfidation temperature on MoS2/Al2O3 catalyst. It is found that the morphology of MoS2 slabs on MoS2/Al2O3 catalyst under typical sulfidation temperature range (573 to 723 K) is a truncated triangle exposing both the M-edge and S-edge. Moreover, the IR/CO data indicate that the truncation degree (ratio of S-edge/M-edge) of MoS2 slabs gradually increases with increasing sulfidation temperature. This finding is in line with density functional theory calculation on model catalysts, providing IR evidence of MoS2 morphology change with sulfidation temperature on an Al2O3-supported catalyst. As a further step, it is also found that the MoS2 morphology is strongly influenced by MoS2-Al2O3 interactions under the same sulfidation temperature.

引用

页码：30039 / 30044

页数：6

共 35 条

[1] A density functional theory comparison of anatase (TiO2)- and γ-Al2O3-supported MoS2 catalysts [J].

Arrouvel, C ;

Breysse, M ;

Toulhoat, H ;

Raybaud, P .

JOURNAL OF CATALYSIS, 2005, 232 (01) :161-178

[2]

BACHELIER J, 1984, B SOC CHIM BELG, V93, P743

[3] Atomic and electronic structure of MoS2 nanoparticles -: art. no. 085410 [J].

Bollinger, MV ;

Jacobsen, KW ;

Norskov, JK .

PHYSICAL REVIEW B, 2003, 67 (08)

[4] Edge termination of MoS2 and CoMoS catalyst particles [J].

Byskov, LS ;

Norskov, JK ;

Clausen, BS ;

Topsoe, H .

CATALYSIS LETTERS, 2000, 64 (2-4) :95-99

[5]

CANDIA R, 1984, B SOC CHIM BELG, V93, P763

[6] IR spectroscopy evidence of MoS2 morphology change by citric acid addition on MoS2/Al2O3 catalysts - A step forward to differentiate the reactivity of M-edge and S-edge [J].

Chen, Jianjun ;

Mauge, Francoise ;

El Fallah, Jaafar ;

Oliviero, Laetitia .

JOURNAL OF CATALYSIS, 2014, 320 :170-179

[7] Edge wetting effects of γ-Al2O3 and anatase-TiO2 supports by MoS2 and CoMoS active phases:: A DFT study [J].

Costa, D. ;

Arrouvel, C. ;

Breysse, M. ;

Toulhoat, H. ;

Raybaud, P. .

JOURNAL OF CATALYSIS, 2007, 246 (02) :325-343

[8] A rational interpretation of improved catalytic performances of additive-impregnated dried CoMo hydrotreating catalysts: a combined theoretical and experimental study [J].

Costa, V. ;

Guichard, B. ;

Digne, M. ;

Legens, C. ;

Lecour, P. ;

Marchand, K. ;

Raybaud, P. ;

Krebs, E. ;

Geantet, C. .

CATALYSIS SCIENCE & TECHNOLOGY, 2013, 3 (01) :140-151

[9] Theoretical study of the MoS2 (100) surface:: A chemical potential analysis of sulfur and hydrogen coverage.: 2.: Effect of the total pressure on surface stability [J].

Cristol, S ;

Paul, JF ;

Payen, E ;

Bougeard, D ;

Clémendot, S ;

Hutschka, F .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (22) :5659-5667

[10] Theoretical study of the MoS2 (100) surface:: A chemical potential analysis of sulfur and hydrogen coverage [J].

Cristol, S ;

Paul, JF ;

Payen, E ;

Bougeard, D ;

Clémendot, S ;

Hutschka, F .

JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (47) :11220-11229

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