Catalytic behavior of selected transition metal carbides, nitrides, and borides in the hydrodenitrogenation of quinoline

Schlatter, James C.; Oyama, S. T.; Metcalfe, Joseph E.; Lambert, Joseph M.

doi:10.1021/ie00081a014

Cited by 254 publications

(96 citation statements)

References 4 publications

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“…Thus the observed differences re¯ect an intrinsic nature of the catalysts and have not originated from different indole conversions. Schlatter et al [6] carried out the quinoline HDN reaction over Mo 2 C and Mo 2 N in a batch reaction system at high pressures, and reported that both catalysts were similar in activity, but Mo 2 C showed considerably higher selectivity to aromatic products than Mo 2 N. However, in our¯ow reactor system for HDN of indole at atmospheric pressure, Mo 2 N (fcc) and Mo 2 C (fcc) gave similar activity but Mo 2 N showed higher selectivity to hydrogenolysis of saturated C±C bonds with lower selectivity to the ring hydrogenation, resulting in selectivity preference to alkylbenzene compounds. In contrast, Mo 2 C (fcc) showed preferential formation of alkanes particularly at higher temperatures.…”

Section: Discussionmentioning

confidence: 99%

“…Lee and Boudart [5] found that unsupported -MoC 1Àx has thiophene HDS activity comparable to that of sul®ded Mo/ Al 2 O 3 . Schlatter et al [6] reported that Mo 2 N and Mo 2 C showed quinoline HDN activity comparable to that of commercial sul®ded Ni±Mo/Al 2 O 3 . Markel and Van Zee [7] revealed a strong resistance property of Mo 2 N against being sul®ded in thiophene HDS.…”

Section: Introductionmentioning

confidence: 91%

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Catalytic hydrodenitrogenation of indole over molybdenum nitride and carbides with different structures

Lee

Hyeon

et al. 1999

Applied Catalysis A: General

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The hydrodenitrogenation (HDN) of indole has been studied over Mo 2 N and Mo 2 C with different structures. The difference in activity was modest and the structure of the catalysts exerted a more signi®cant effect than the chemical composition. More evident difference was observed in selectivity, and here the composition was the most important factor. Sonochemically prepared Mo 2 C was an active catalyst for HDN reaction. It formed plate-like aggregates of loosely packed Mo 2 C (fcc) particles. The crystallinity of sonochemically prepared Mo 2 C was improved during the reaction, and its behavior in HDN became similar to Mo 2 C (fcc) prepared by the TPR method. #

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Catalytic hydrodenitrogenation of indole over molybdenum nitride and carbides with different structures

Lee

Hyeon

et al. 1999

Applied Catalysis A: General

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“…Molybdenum nitrides were extensively studied for HDT reactions, 57,59 however, they were only recently studied for HER, mostly in combination with a promoting metal. Chen et al applied nickel to improve molybdenum nitride in HER catalysis.…”

Section: Promoted Molybdenum Nitrides (Mo X N)mentioning

confidence: 99%

Nanostructured hydrotreating catalysts for electrochemical hydrogen evolution

2014

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Progress in catalysis is driven by society's needs. The development of new electrocatalysts to make renewable and clean fuels from abundant and easily accessible resources is among the most challenging and demanding tasks for today's scientist and engineers. The electrochemical splitting of water into hydrogen and oxygen has been known for over 200 years, but in the last decade and motivated by the perspective of solar hydrogen production, new catalysts made of earth-abundant materials have emerged. Here we present an overview of recent developments of the non-noble metal catalysts for electrochemical hydrogen evolution reaction (HER). Emphasis is given to the nanostructuring of industrially relevant hydrotreating catalysts as potential HER electrocatalysts. The new syntheses and nanostructuring approaches might pave the way to future developments of highly efficient catalysts for energy conversion.

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“…In particular, they have potential applications in both hydrodenitrogenation (HDN) and hydrodesulfurization (HDS) processes. [1][2][3][4][5][6] Recently, transition-metal phosphides have also been found to possess excellent catalytic properties for HDS 7 and HDN reactions. [8][9][10] It was found that molybdenum phosphides were intrinsically the most active catalysts in hydroprocessing reactions among a series of catalysts.…”

Section: Introductionmentioning

confidence: 99%

Carbon Monoxide Adsorption on Molybdenum Phosphides: Fourier Transform Infrared Spectroscopic and Density Functional Theory Studies

Feng

Liang

et al. 2003

J. Phys. Chem. B

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Molybdenum phosphide (MoP) and supported molybdenum phosphide (MoP/γ-Al 2 O 3 ) have been prepared by the temperature-programmed reduction method. The surface sites of the MoP/γ-Al 2 O 3 catalyst were characterized by carbon monoxide (CO) adsorption with in situ Fourier transform infrared (FT-IR) spectroscopy. A characteristic IR band at 2037 cm -1 was observed on the MoP/γ-Al 2 O 3 that was reduced at 973 K. This band is attributed to linearly adsorbed CO on Mo atoms of the MoP surface and is similar to IR bands at 2040-2060 cm -1 , which correspond to CO that has been adsorbed on some noble metals, such as platinum, palladium, and rhodium. Density functional calculations of the structure of molybdenum phosphides, as well as CO chemisorption on the MoP(001) surface, have also been studied on periodic surface models, using the generalized gradient approximation (GGA) for the exchange-correlation functional. The results show that the chemisorption of CO on MoP occurred mainly on top of molybdenum, because the bonding of CO requires a localized mininum potential energy. The adsorption energy obtained is ∆H ads ≈ -2.18 eV, and the vibrational frequency of CO is 2047 cm -1 , which is in good agreement with the IR result of CO chemisorption on MoP/γ-Al 2 O 3 .

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Catalytic behavior of selected transition metal carbides, nitrides, and borides in the hydrodenitrogenation of quinoline

Abstract: High surface area carbides and nitrides have been synthesized and tested for hydrodenitrogenation activity. Some of the novel materials, particularly Mo2C and Mo2N, provided hydrodenitrogenation activity of the same magnitude as commercial sulfided Ni-Mo/Al203.

Cited by 254 publications

References 4 publications

Catalytic hydrodenitrogenation of indole over molybdenum nitride and carbides with different structures

Catalytic hydrodenitrogenation of indole over molybdenum nitride and carbides with different structures

Nanostructured hydrotreating catalysts for electrochemical hydrogen evolution

Carbon Monoxide Adsorption on Molybdenum Phosphides: Fourier Transform Infrared Spectroscopic and Density Functional Theory Studies

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