Preparation of new oxidic precursors based on heteropolyanions for efficient hydrocracking catalysts

Tayeb, K. Ben; Lamonier, Carole; Lancelot, Christine; Fournier, Michel; Payen, Edmond; Bertoncini, Fabrice; Bonduelle, Audrey

doi:10.1016/j.crci.2008.10.020

Cited by 9 publications

(5 citation statements)

References 15 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 5 presents the infrared spectrum of heteropolyacid. The observed peaks have been verified using literature data [15,37,[44][45][46][47][48] ) and/or Bneutral^water. The FTIR spectra of PEDOT, PyBA, and PEDOT/PyBA were reported before [47].…”

Section: Controlled Electrodeposition Of Hybrid Coatings Of Pedot/ P mentioning

confidence: 78%

Development of copper-stabilized conducting-polymer/polyoxometalate hybrid materials for effective electrochemical charging

Adamczyk

2016

J Solid State Electrochem

View full text Add to dashboard Cite

A hybrid organic-inorganic material composed of poly (3,4-ethylenedioxythiophene), PEDOT, derivatized with 4-(pyrrol-e1-yl) benzoic acid, PyBA, and Keggin-type copper (II)-salt of H 3 PMo 12 O 40 has been proposed here. Such features as good electronic conductivity of PEDOT, hydrophilic and coordination capabilities of PyBA, the ability of copper ( I I ) i o n s t o l i n k P y B A c ar b ox y l i c g r o u p s , a n d phosphomolybdate anionic sites, as well as high protonic and mixed-valence conductivities of H 3 PMo 12 O 40 have been explored here to produce a stable composite material charcterized by reasonable charge propagation dynamics. Characterization and formation of the hybrid ca. 0.6 μm thick PEDOT/PyBA-Cu x H y PMo 12 O 40 films have been asessed by FTIR, XRD, AFM, SEM, as well as using electrochemical methods. Among important feautures of the proposed hybrid system is the ability to undergo reversible charging/ discharhging (both under voltammetric and galvanostatic conditions) in a manner analogous to what is observed in battery--type cells. Typical parameters, such as specific capacity, energy, and power densities, are provided and discussed.

show abstract

Section: Controlled Electrodeposition Of Hybrid Coatings Of Pedot/ P mentioning

confidence: 78%

Development of copper-stabilized conducting-polymer/polyoxometalate hybrid materials for effective electrochemical charging

Adamczyk

2016

J Solid State Electrochem

View full text Add to dashboard Cite

show abstract

“…The methodology implemented for the decomposition of the spectra of the W4f has been described elsewhere. [24][25][26][27] The decomposition of the photopeaks revealed three contributions attributed to W 6+ in an oxidic environment (W4f5/2: 36.2 eV and W4f3/2: 38.3 eV), W 5+ as oxysulde species (33.2 eV and 35.4 eV) and W 4+ sulded species (32.3 eV and 34.4 eV). 25,27,31,32 The data obtained from these decompositions are listed in Table 3.…”

Section: Characterizationsmentioning

confidence: 99%

“…[24][25][26][27] The decomposition of the photopeaks revealed three contributions attributed to W 6+ in an oxidic environment (W4f5/2: 36.2 eV and W4f3/2: 38.3 eV), W 5+ as oxysulde species (33.2 eV and 35.4 eV) and W 4+ sulded species (32.3 eV and 34.4 eV). 25,27,31,32 The data obtained from these decompositions are listed in Table 3. The WS 2 is representative of the suldation degree of tungsten.…”

Section: Characterizationsmentioning

confidence: 99%

“…Typically, the impregnation solution was obtained by dissolution of nickel nitrate hexahydrate and ammonium metatungstate in water with a W/Ni molar ratio of 2.75 based on our previous study. [24][25][26][27] The calculated content of WO 3 in catalyst was 15 wt%. These catalysts were dried at 373 K overnight and then calcined at 773 K for 4 h in air, using a temperature ramp of 2 K min À1 .…”

Section: Preparation Of Catalystsmentioning

confidence: 99%

“…31 Their decomposition evidenced three contributions: Nickel suldes Ni x S y (Ni2p3/2: 852.6 eV, Ni2p1/2: 869.8 eV), NiWS (Ni2p3/2: 853.7 eV, Ni2p1/2: 870.9 eV) and an oxidic phase Ni 2+ (Ni2p3/2: 856.4 eV, Ni2p1/2: 873.8 eV). 25,27,31,32 The proportions of NiO, Ni x S y and NiWS in the catalysts were calculated and listed in Table 4. The proportion of NiWS species is representative of the promotion degree of WS 2 slabs by the nickel.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Restraining deactivation of hierarchical zeolite supported NiW catalysts in the HDS of thiophene

et al. 2015

View full text Add to dashboard Cite

NiW catalysts supported on g-Al 2 O 3 (NiW/Al 2 O 3 ), commercial Beta (NiW/HB) and hierarchical Beta prepared by base-acid treatment (NiW/HB-M) were characterized by X-ray diffraction (XRD), N 2 sorption, infrared spectroscopy (IR), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS).The catalytic performance of these catalysts was evaluated in the hydrodesulfurization (HDS) of

show abstract

Increase of the Ni/W Ratio in Heteropolyanions Based NiW Hydrocracking Catalysts with Improved Catalytic Performances

et al. 2013

View full text Add to dashboard Cite

Preparation of new oxidic precursors based on heteropolyanions for efficient hydrocracking catalysts

Cited by 9 publications

References 15 publications

Development of copper-stabilized conducting-polymer/polyoxometalate hybrid materials for effective electrochemical charging

Development of copper-stabilized conducting-polymer/polyoxometalate hybrid materials for effective electrochemical charging

Restraining deactivation of hierarchical zeolite supported NiW catalysts in the HDS of thiophene

Increase of the Ni/W Ratio in Heteropolyanions Based NiW Hydrocracking Catalysts with Improved Catalytic Performances

Contact Info

Product

Resources

About