Studies on vanadium-doped iron phosphate catalysts for the ammoxidation of methylpyrazine

Nagaraju, P.; Lingaiah, N.; Balaraju, M.; Prasad, P. S. Sai

doi:10.1016/j.apcata.2007.09.032

Cited by 29 publications

(15 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Large particle formation through crystallization of MoO 3 for 5Mo/FeP could lead to the reduction of active surface and resulted in lower 2-CP yield (62.0%). In our previous report, 4 vanadium doped FeP (3V/FeP) showed a maximum 2-CP yield of 50.0% at 380 • C. Recently, Martin et al 19 reported a maximum 2-CP yield of 40.0% on FeVO 4 under similar reaction conditions. In addition, the same authors reported 2-CP yield of 50.0% on V 2 O 5 -Au/TiO 2 .…”

Section: Influence Of Mo/fep Acidity On 2-cp Selectivitymentioning

confidence: 79%

See 1 more Smart Citation

Ammoxidation of 2-methyl pyrazine to 2-cyano pyrazine on MoO 3 /FePO 4 catalysts

et al. 2016

View full text Add to dashboard Cite

The objective of this work is to understand the influence of small amount of Mo=O (1, 3 and 5 wt.% MoO 3) impregnated on FePO 4 and its resultant effect on the acidity was studied for the ammoxidation of 2-methyl pyrazine (2-MP) to 2-cyano pyrazine (2-CP) in the temperature range of 380-420 • C. The Mo/FeP catalyst characteristics were evaluated by XRD, HAADF-EDS, TPR and NH 3-TPD techniques. Primarily, quartz-type XRD phase was observed for the iron phosphate (FeP). The Mo/FeP exhibits MoO 3 and quartztype iron phosphate phase. The interface between Mo particles (20 nm) and FeP was clearly established by HR-TEM in 3Mo/FeP. Furthermore, the average atomic composition revealed by HAADF/EDS for 3Mo/FeP as Fe 30.0%, P 40.0% and Mo 1.6% with Fe/Mo surface XPS ratio 6. The greater 2-CP yield of 68.0% on 3Mo/FeP was attributed to enhanced, moderate acid sites coming from MoO 3 and cooperation between Mo and FeP at the interface in terms of oxygen and electron transfer to the reactant (2-MP).

show abstract

Section: Influence Of Mo/fep Acidity On 2-cp Selectivitymentioning

confidence: 79%

“…2,3 Furthermore, enhanced 2-CP yield (50.0%) was obtained by introducing a small amount of vanadium in to this catalyst. 4 MoO 3 supported on TiO 2 , ZrO 2 and ZrO 2 -Al 2 O 3 was employed as an ammoxidation catalyst. 5,6 However, high temperature activity and complete oxidation was the drawback of these catalysts.…”

Section: Introductionmentioning

confidence: 99%

Ammoxidation of 2-methyl pyrazine to 2-cyano pyrazine on MoO 3 /FePO 4 catalysts

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The positions of the bands and their assignments are consistent with literature reports. [22][23][24] The initial thermogravimetric analysis of compound 1 was carried out in a nitrogen atmosphere with a heating rate of 10 K·min -1 . It shows three mass loss steps between 65 and 640°C.…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal Synthesis, Structure, and Electrochemical Properties of a Three‐dimensional Vanadium‐Nickel Phosphate (C₂H₁₀N₂)₄[H₂Ni(H₂O)₂(VO)₈(OH)₄(PO₄)₈]·H₂O

Yin

Peng

et al. 2013

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

Abstract. The three-dimensional vanadium-nickel phosphate (C 2 H 10 N 2 ) 4 [H 2 Ni(H 2 O) 2 (VO) 8 (OH) 4 (PO 4 ) 8 ]·H 2 O (1) was prepared by hydrothermal methods and its structure and electrochemical properties were characterized. The compound crystallizes in the monoclinic system with the space group P2 1 /n and cell parameters a = 14.392(3) Å, b = 10.122(2) Å, c = 18.305(4) Å, β = 90.34(3)°, V = 2666.7(9) Å 3 , Z = 2. The structure consists of macroanionic V-Ni-P layers con-

show abstract

“…The N 1s signal shows peak around 400-404 eV correlated with the photo activity in Visible light 53 or may be due to presence of interstitial N 2 in Vanadium n-propylamino phosphate 54 . The Vanadium ion shows peak at 525 eV corresponding to binding energy of V 2p 1/2 electron indicates Vanadium exists as V 4+ oxidation state and the peak became broadened 55 . The V2p XPS spectrum indicates, Vanadium exists as V 4+ and V 5+ oxidation states in Vanadium n-propylamino phosphate catalyst.…”

Section: Resultsmentioning

confidence: 99%

A novel vanadium n-propylamino phosphate catalyst: synthesis, characterization and applications

et al. 2012

View full text Add to dashboard Cite

A novel, lamellar type Vanadium n-propylamino phosphate catalyst is synthesized and characterized by using various physicochemical techniques such as Powder X-ray diffraction, Scanning electron microscopy/Energy dispersive X-ray analysis, Thermogravimetry/Differential thermal analysis, Fourier transform Infrared analysis, Electron spin resonance spectroscopy, Ultraviolet -Visible Diffuse reflectance spectroscopy, X-ray Photoelectron spectroscopy, 31 P Magic angle spinning Nuclear Magnetic Resonance spectroscopy and Catalytic applications toward Octahydroquinazolinone synthesis. It is found that the n-propylamine is present as sandwich between Vanadyl phosphate layers. Most of the Vanadium is present as V 4+ ions in tetrahedral co-ordination. Vanadium n-propylamino phosphate catalyses Octahydroquinazolinone synthesis more effeciently and the optimum conditions required for Octahydroquinazolinone synthesis are, Benzaldehyde (2 mmol), Dimedone (2 mmol), Urea (4 mmol), Methanol + Water (1:1, 5 mL) and Catalyst (0.05 g). A plausible mechanism is also proposed.

show abstract

Studies on vanadium-doped iron phosphate catalysts for the ammoxidation of methylpyrazine

Cited by 29 publications

References 28 publications

Ammoxidation of 2-methyl pyrazine to 2-cyano pyrazine on MoO 3 /FePO 4 catalysts

Ammoxidation of 2-methyl pyrazine to 2-cyano pyrazine on MoO 3 /FePO 4 catalysts

Hydrothermal Synthesis, Structure, and Electrochemical Properties of a Three‐dimensional Vanadium‐Nickel Phosphate (C₂H₁₀N₂)₄[H₂Ni(H₂O)₂(VO)₈(OH)₄(PO₄)₈]·H₂O

A novel vanadium n-propylamino phosphate catalyst: synthesis, characterization and applications

Contact Info

Product

Resources

About

Studies on vanadium-doped iron phosphate catalysts for the ammoxidation of methylpyrazine

Cited by 29 publications

References 28 publications

Ammoxidation of 2-methyl pyrazine to 2-cyano pyrazine on MoO 3 /FePO 4 catalysts

Ammoxidation of 2-methyl pyrazine to 2-cyano pyrazine on MoO 3 /FePO 4 catalysts

Hydrothermal Synthesis, Structure, and Electrochemical Properties of a Three‐dimensional Vanadium‐Nickel Phosphate (C2H10N2)4[H2Ni(H2O)2(VO)8(OH)4(PO4)8]·H2O

A novel vanadium n-propylamino phosphate catalyst: synthesis, characterization and applications

Contact Info

Product

Resources

About

Hydrothermal Synthesis, Structure, and Electrochemical Properties of a Three‐dimensional Vanadium‐Nickel Phosphate (C₂H₁₀N₂)₄[H₂Ni(H₂O)₂(VO)₈(OH)₄(PO₄)₈]·H₂O