Smart designing of metal-support interface for imperishable dry reforming catalyst

Shah, Mumtaj; Das, Subhasis; Nayak, Ameeya Kumar; Mondal, Prasenjit; Bordoloi, Ankur

doi:10.1016/j.apcata.2018.01.007

Cited by 55 publications

(37 citation statements)

References 56 publications

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“…They do not contain any peak attributable to crystalline NiO, confirming the intimate mixing between Ni and the oxide support. This is also demonstrated by the temperature program reduction profile of NiAl MIL that displays only one peak centered at a high temperature of about 830 °C (Table and Figure S1a) typical of the formation of the spinel NiAl 2 O 4 phase . The high and homogeneous Ni dispersion throughout the sample is visible as well from STEM‐HAADF and EDX elemental mappings that show the superimposed Ni and Al distributions on a representative NiAl MIL grain (Figure ).…”

Section: Resultsmentioning

confidence: 56%

“…This is also demonstrated by the temperature program reduction profile of NiAl MIL that displays only one peak centered at a high temperature of about 830°C (Table 1 and Figure S1a) typical of the formation of the spinel NiAl 2 O 4 phase. [53,54] The high and homogeneous Ni dispersion throughout the sample is visible as well from STEM-HAADF and EDX elemental mappings that show the superimposed Ni and Al distributions on a representative NiAl MIL grain (Figure 8). In order to evaluate the impact on the material properties of the adopted preparation procedure (i.e.…”

Section: Characteristics Of the Parent Mil-53 Activated Mil And Imprmentioning

confidence: 90%

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Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

et al. 2019

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An Al‐containing MIL‐53 metal‐organic framework with very high surface area (SBET=1130 m2.g−1, N2 sorption) was used as sacrificial template to prepare a nickel‐alumina‐based catalyst (Ni0AlMIL) highly active and stable in the reaction of dry reforming of methane (DRM). The procedure consisted in impregnating the activated (solvent free) MIL‐53 sample with a nickel precursor solution, then calcining the material to remove the organic linkers and subsequently reducing it to form the reduced nickel active phase. At the step of calcination, this procedure results in the formation of a porous uniform spinel phase with Ni nanospecies embedded in the alumina‐based matrix, as deduced from XRD, TPR and TEM analyses. This leads after reduction to a porous lamellar γ‐Al2O3 material with small Ni0 nanoparticles homogeneously dispersed and stabilized within the support. The performances of this catalyst in DRM are better than those of two reference Ni/alumina catalysts prepared for comparison by conventional nickel impregnation of two preformed alumina supports: a first one obtained by calcination of MIL‐53 (AlMIL) and a second one consisting of a commercial γ‐Al2O3 batch (AlCOM). Under steady state conditions at a temperature of 650 °C and a pressure of 1 bar, the higher CH4 and CO2 conversions (till 3 times higher than on Ni0/AlCOM), high catalytic stability (no loss of activity after 13–100 h) and higher selectivity towards DRM (H2:CO products ratio remaining at 1) on Ni0AlMIL compared to the other catalysts is believed to come from the particularly strong interaction between the nickel and alumina phases generated by using the unique high specific surface of the parent MOF support to deposit nickel. This creates an intimate mixing favorable to a persisting interaction of the nickel nanoparticles with the alumina support in the reduced material. The lamellar shape of the γ‐Al2O3 composing the catalyst and its remaining high specific surface may also contribute to the excellent Ni resistance to sintering and in turn to the inhibition of carbon nanotubes formation during the reaction.

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Section: Resultsmentioning

confidence: 56%

Section: Characteristics Of the Parent Mil-53 Activated Mil And Imprmentioning

confidence: 90%

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

et al. 2019

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“…[23][24][25] In addition, it has been evidenced that a fine-tuning and intensification of the interactions between Ni and support can induce better anticoke and anti-sintering performance of the catalysts. 26,27 The effect of interactions between the active metal and support, as a result of the formation of a solid solution, on the catalysts' performance during dry reforming reaction has been widely evaluated in literature. Excellent activity and stability have been reported by Hu for the NiO-MgO (or CoO-MgO) solid solution; 28 the carbon deposition is inhibited by the isolation effect of small nickel particles formed on the catalytic surface coupled with the surface basicity of MgO.…”

Section: Introductionmentioning

confidence: 99%

Kinetic study of the methane dry (CO₂) reforming reaction over the Ce_0.70La_0.20Ni_0.10O_2−δ catalyst

Pino

Italiano

Laganà

et al. 2020

Catal. Sci. Technol.

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“…One of the most promising approaches to the reduction of ohmic resistance is the application of electrolyte thin films having a thickness of about 10-30 µm [6][7][8]. Due to technological issues involved in the manufacture of such thin films, their formation should be carried out on a porous supporting substrate (cathode [9][10][11], anode [12][13][14], metal interconnector [15][16][17]) in order to ensure the mechanical strength of the cell. For this reason, questions arise concerning the production technology of supporting substrates.…”

Section: Introductionmentioning

confidence: 99%

Application of Promising Electrode Materials in Contact with a Thin-Layer ZrO2-Based Supporting Electrolyte for Solid Oxide Fuel Cells

et al. 2020

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The paper presents the results of an investigation into thin single- and triple-layer ZrO2-Sc2O3-based electrolytes prepared using the tape-casting technique in combination with promising electrodes based on La2NiO4+δ and Ni-Ce0.8Sm0.2O2-δ materials. It is shown that pressing and joint sintering of single electrolyte layers allows multilayer structures to be obtained that are free of defects at the layer interface. Electrical conductivity measurements of a triple-layer electrolyte carried out in longitudinal and transverse directions with both direct and alternating current showed resistance of the interface between the layers on the total resistance of the electrolyte to be minimal. Long-term tests have shown that the greatest degradation in resistance over time occurs in the case of an electrolyte with a tetragonal structure. Symmetrical electrochemical cells with electrodes fabricated using a screen-printing method were examined by means of electrochemical impedance spectroscopy. The polarization resistance of the electrodes was 0.45 and 0.16 Ohm∙cm2 at 800 °C for the fuel and oxygen electrodes, respectively. The distribution of relaxation times method was applied for impedance data analysis. During tests of a single solid oxide fuel cell comprising a supporting triple-layer electrolyte having a thickness of 300 microns, a power density of about 160 mW/cm2 at 850 °C was obtained using wet hydrogen as fuel and air as an oxidizing gas.

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Smart designing of metal-support interface for imperishable dry reforming catalyst

Cited by 55 publications

References 56 publications

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

Kinetic study of the methane dry (CO₂) reforming reaction over the Ce_0.70La_0.20Ni_0.10O_2−δ catalyst

Application of Promising Electrode Materials in Contact with a Thin-Layer ZrO2-Based Supporting Electrolyte for Solid Oxide Fuel Cells

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Smart designing of metal-support interface for imperishable dry reforming catalyst

Cited by 55 publications

References 56 publications

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

Kinetic study of the methane dry (CO2) reforming reaction over the Ce0.70La0.20Ni0.10O2−δ catalyst

Application of Promising Electrode Materials in Contact with a Thin-Layer ZrO2-Based Supporting Electrolyte for Solid Oxide Fuel Cells

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Kinetic study of the methane dry (CO₂) reforming reaction over the Ce_0.70La_0.20Ni_0.10O_2−δ catalyst