Influence of synthesis method on molybdenum carbide crystal structure and catalytic performance in stearic acid hydrodeoxygenation

Macedo, Luana Souza; Oliveira, Ricardo R.; Haasterecht, T. van; Silva, Victor Teixeira da; Bitter, Harry

doi:10.1016/j.apcatb.2018.09.020

Cited by 66 publications

(42 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding previous literature results, it has been reported that the synthesis of molybdenum carbide over carbon nanofibers and carbon nanotubes using the TPR method (CH 4 /H 2 ) also led to the formation of β-Mo 2 C and that above 700°C no molybdenum oxide was observed. 21,22 Other authors also analysed the effect of the surface chemistry and structural properties of the support using an oxidized graphite and oxidized activated carbon. 23 Although a clear correlation of surface chemistry and structural properties with the formed molybdenum phase was difficult to obtain, the authors suggested that the defective carbon was somehow responsible for the formation of β-Mo 2 C and that the controlled reduction of the molybdenum precursor was a critical factor to determine the formed crystal phase.…”

Section: Catalysis Science and Technology Papermentioning

confidence: 99%

Selective hydrogen production from formic acid decomposition over Mo carbides supported on carbon materials

Carrales-Alvarado

Dongil

Fernández-Morales

et al. 2020

Catal. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Section: Catalysis Science and Technology Papermentioning

confidence: 99%

Selective hydrogen production from formic acid decomposition over Mo carbides supported on carbon materials

Carrales-Alvarado

Dongil

Fernández-Morales

et al. 2020

Catal. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Thus, for the catalysts with low amount of carbon, all the carbon is introduced in the molybdenum carbide structure. The literature on supported molybdenum carbides obtained by carburization with 20% v/v CH4/H2 shows the production of either hexagonal (on TiO2 50 , Al2O3 32 and carbon nanotubes 19 ) or cubic molybdenum carbide (on CNF 24 ). We report here the sole formation of cubic molybdenum carbide on TiO2 when using methane as hydrocarbon.…”

Section: Effect Of Hydrocarbon Concentration In the Reactive Gas Mixturementioning

confidence: 99%

Influence of Reduction–Carburization Parameters on the Performance of Supported Molybdenum Carbide Catalysts in Succinic Acid Hydrogenation

Hamdan

Lilic

Vecino-Mantilla

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Molybdenum carbides supported on TiO2 or ZrO2 were prepared by temperature programmed reduction carburization method using mixtures of hydrogen and hydrocarbon (methane or ethane). All the materials exhibited molybdenum carbide with cubic crystallographic structure. The carbon content and MoC lattice parameter increased with the increase of hydrocarbon percentage (5-40%) and temperature (600-800°C) during carburization. All catalysts were significantly active in the hydrogenation of succinic acid to butyric acid and γ-butyrolactone. For the first time, a correlation between the degree of carburization and the catalytic activity for succinic acid hydrogenation was established. The selectivity depends strongly on the support. MoC/TiO2 favored the formation of butyric acid while MoC/ZrO2 and bulk MoC generated primarily γ-butyrolactone. The stability of MoC/TiO2 up to 50 h on stream in continuous reactor was demonstrated, showing the interest of carbide catalysts for future biorefinery processes.

show abstract

“…The difference in deposition between Systems 1 and 2 hints toward a difference in the film crystallinity. It has been reported that catalytic activity of Mo 2 C can be sensitive to its crystalline structure depending on whether the α-Mo 2 C (cubic phase) or β-Mo 2 C (hexagonal phase) form is present [28,29]. This structure dependence can also effect the catalytic activity for graphene synthesis.…”

Section: Mo 2 C Crystallinitymentioning

confidence: 99%

The role of pinhole structures in Mo thin films on multi-layer graphene synthesis

et al. 2020

View full text Add to dashboard Cite

In this study, the density and oxygen content of Mo thin films were varied by changing the deposition conditions, in order to understand their influence on the catalytic activity of Mo 2 C for the synthesis of multi-layer graphene (MLG). Structural and morphological analysis of Mo 2 C in relation to its catalytic activity indicate that the density of Mo plays a more critical role on MLG synthesis than the oxygen content. Results show that the pinholes present in relatively low density Mo layers act as catalytically active defect sites, promoting MLG synthesis. OPEN ACCESS RECEIVED

show abstract

Influence of synthesis method on molybdenum carbide crystal structure and catalytic performance in stearic acid hydrodeoxygenation

Cited by 66 publications

References 46 publications

Selective hydrogen production from formic acid decomposition over Mo carbides supported on carbon materials

Selective hydrogen production from formic acid decomposition over Mo carbides supported on carbon materials

Influence of Reduction–Carburization Parameters on the Performance of Supported Molybdenum Carbide Catalysts in Succinic Acid Hydrogenation

The role of pinhole structures in Mo thin films on multi-layer graphene synthesis

Contact Info

Product

Resources

About