ChemInform Abstract: Active Sites in Pt‐Mo on Silica Catalysts for Reactions of Hydrocarbons with Hydrogen

Leclercq, G.; Pietrzyk, S.; Romero, Trino; Gharbi, A. El; Gengembre, L.; Grimblot, J.; Aiessi, F.; Guelton, M.; Latef, Ahmed; Leclercq, Loı̈c

doi:10.1002/chin.199751315

Cited by 4 publications

(4 citation statements)

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“…The binding energy for Mo(3d 5/2 ) and Mo(3d 3/2 ) showed some slight variation with different samples, but dropped to 227.8-228.2 and 230.7-231.1 eV, respectively; that for C(1s) dropped to 283.8 eV. These values are consistent with those attributed to Mo 2 C [28,29]. In terms of the acidity of the catalysts, we refer to our previous work, which used the same samples [30].…”

Section: Methodssupporting

confidence: 90%

Dimethyl Ether as a Source of Reactive Species for Alkylation of Benzene

Széchenyi

Solymosi

2008

Catal Lett

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The co-reaction of dimethyl ether and benzene has been investigated on pure and promoted-ZSM-5 catalysts at 473-773 K. It was found that the addition of benzene to dimethyl ether markedly increased the formation of toluene, xylene and C 9 aromatics on ZSM-5 at and above 623 K. This feature is attributed to the reaction of benzene with the reactive hydrocarbon species formed in the decomposition of dimethyl ether on the acidic sites of ZSM-5 zeolite. The extent of the enhancement was further increased by ZnO and Mo 2 C promoters.

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Section: Methodssupporting

confidence: 90%

Dimethyl Ether as a Source of Reactive Species for Alkylation of Benzene

Széchenyi

Solymosi

2008

Catal Lett

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“…So far, a few approaches are available for the synthesis of molybdenum carbide nanostructures. Most of these methods are connected to reductive carburization of molybdenum oxide particles in the CH 4 –H 2 mixture, including temperature‐programmed reaction and CVD, pyrolysis of metal complexes, liquid‐phase reaction, template method, etc. One of the most common methods is the temperature‐programmed reduction (TPR) of the molybdenum oxide by gaseous hydrocarbons, as pioneered by Levy and Boudart.…”

Section: Synthesis Methods For Transition Metal Carbides and Nitridesmentioning

confidence: 99%

Transition Metal Carbides and Nitrides in Energy Storage and Conversion

et al. 2016

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High‐performance electrode materials are the key to advances in the areas of energy conversion and storage (e.g., fuel cells and batteries). In this Review, recent progress in the synthesis and electrochemical application of transition metal carbides (TMCs) and nitrides (TMNs) for energy storage and conversion is summarized. Their electrochemical properties in Li‐ion and Na‐ion batteries as well as in supercapacitors, and electrocatalytic reactions (oxygen evolution and reduction reactions, and hydrogen evolution reaction) are discussed in association with their crystal structure/morphology/composition. Advantages and benefits of nanostructuring (e.g., 2D MXenes) are highlighted. Prospects of future research trends in rational design of high‐performance TMCs and TMNs electrodes are provided at the end.

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“…Since Levy and Boudart demonstrated that tungsten carbide (WC) exhibited catalytic activity similar to Pt [1], metal carbide based catalysts have attracted a significant amount of attention due to their catalytic similarity to noble metal catalysts [2][3][4][5]. Along with WC, molybdenum carbide (Mo 2 C) catalysts have been one of the primary carbides studied, particularly for reactions involving hydrocarbons [6][7][8][9][10][11]. After Green and coworkers demonstrated that WC and Mo 2 C catalyzed methane reforming reactions with activities comparable to Ir and Ru [12][13][14][15][16][17], studies of methane and hydrocarbon reforming catalyzed by Mo 2 C have become a popular vein of research [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Tunable Syn-gas ratio via bireforming over coke-resistant Ni/Mo2C catalyst

Brush

Evans

Mullen

et al. 2016

Fuel Processing Technology

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This study demonstrates the ability of Ni/Mo 2 C to catalyze the Methane Bireforming Reaction (combined Dry Methane Reforming Reaction, CH 4 + CO 2  2H 2 + 2CO, and Steam Methane Reforming Reaction, CH 4 + H 2 O  3H 2 + CO). By varying the ratio of CO 2 :H 2 O, the resulting H 2 :CO ratio could be tuned from 0.91 to 3.0, covering a wide range of Syn Gas (H 2 + CO) ratios relevant to various hydrocarbon syntheses. We also document the unusual deactivation behavior of Ni/Mo 2 C in this system. The catalytic activity would change from very high (greater than 50% conversion) to very low (less than 10% conversion) within 10 minutes. Despite running under conditions typically favorable for coking with a Ni catalyst (high temperature, 950°C, and excess methane), XRD, TGA, TEM, SEM, and EDX results clearly show no evidence of coking during the reaction or after deactivation. In addition, the changes to the Ni/Mo 2 C catalyst seen after deactivation (oxidation of Mo 2 C to MoO 2 , Ni-phase changes, and catalyst morphology changes) could not be seen in the catalyst subjected to reaction conditions that were halted before deactivation could occur. This suggests a sudden, rapid deactivation "event" occurs in this catalytic system as opposed to gradual catalyst deactivation, a behavior more typically seen with catalysts.

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ChemInform Abstract: Active Sites in Pt‐Mo on Silica Catalysts for Reactions of Hydrocarbons with Hydrogen

Abstract: Active Sites in Pt-Mo on Silica Catalysts for Reactions of Hydrocarbons with Hydrogen -(60 refs.). -(LECLERCQ, G.; PIETRZYK, S.; ROMERO, T.; EL GHARBI, A.; GENGEMBRE, L.; GRIMBLOT, J.; AIESSI, F.; GUELTON, M.; LATEF, A.; LECLERCQ, L.; Ind. Eng.

Cited by 4 publications

References 1 publication

Dimethyl Ether as a Source of Reactive Species for Alkylation of Benzene

Dimethyl Ether as a Source of Reactive Species for Alkylation of Benzene

Transition Metal Carbides and Nitrides in Energy Storage and Conversion

Tunable Syn-gas ratio via bireforming over coke-resistant Ni/Mo2C catalyst

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