Electrospun vanadium oxide based submicron diameter fiber catalysts. Part II: Effect of chemical formulation and dopants

Ternero-Hidalgo, Juan José; Guerrero‐Pérez, M. Olga; Rodríguez-Mirasol, José; Cordero, Tomás

doi:10.1016/j.cattod.2018.10.072

Cited by 8 publications

(14 citation statements)

References 19 publications

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“…Subsequently, the three polymer solutions were vigorously stirred for 24 h at room temperature. The electrospinning equipment and procedure have also been described in previous articles [48][49] . The electrospun fibers were calcined in air flow (150 mL•min -1 STP) at 500 ºC in a conventional tubular furnace, with a heating rate of 10 ºC•min -1 followed by 6 h dwell time in order to eliminate the organic part and the remaining solvent, and to stabilize the zirconia fibers.…”

Section: Methodsmentioning

confidence: 99%

“…The electrospun fibers were calcined in air flow (150 mL•min -1 STP) at 500 ºC in a conventional tubular furnace, with a heating rate of 10 ºC•min -1 followed by 6 h dwell time in order to eliminate the organic part and the remaining solvent, and to stabilize the zirconia fibers. The final vanadium mass concentration obtained by XPS analysis of Zr-V2.5, Zr-V5.0 and Zr-V6.4 samples was reported to be 2.7, 4.9 and 6.0%, respectively [48][49] .…”

Section: Methodsmentioning

confidence: 99%

“…The catalysts were prepared by electrospinning. The synthesis of the solutions as well as the electrospinning equipment and procedure and the XPS analyses have been previously described. , Sample synthesis and pretreatment and XPS results are detailed in the Supporting Information (SI). The final vanadium mass concentration on the surface of Zr–V2.5, Zr–V5.0, and Zr–V6.4 samples obtained by XPS analysis was reported to be 2.7, 4.9, and 6.0%, respectively. , …”

Section: Methodsmentioning

confidence: 99%

“…The final vanadium mass concentration on the surface of Zr−V2.5, Zr− V5.0, and Zr−V6.4 samples obtained by XPS analysis was reported to be 2.7, 4.9, and 6.0%, respectively. 48,49 The "IRRaman" Reactor. The IR−Raman operando rig was specifically designed at Laboratoire Catalyze et Spectrochimie (Caen, France) by adapting a homemade operando IR reactorcell for self-supported wafers of ∼20−30 mg and 2 cm 2 (the socalled "Sandwich" reactor) 50 to also host a Raman probe (Figure 1).…”

Section: T H Imentioning

confidence: 99%

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Operando Reactor-Cell with Simultaneous Transmission FTIR and Raman Characterization (IRRaman) for the Study of Gas-Phase Reactions with Solid Catalysts

et al. 2020

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Raman and transmission FTIR spectroscopic techniques have been coupled in a new homemade reactor-cell designed in a joint CSIC-UNICAEN collaboration. The set-up is easily adapted to any FTIR and fibre-coupled Raman spectrometers and gas analysis techniques. Simultaneous operando FTIR and Raman spectroscopic measurement allow complementary characterization of adsorbed species, reaction intermediates, and structural properties of the catalyst. This system was validated with the study of vanadium based catalysts during propane OxyDeHydrogenation (ODH). The combined use of both spectroscopies with gas analysis techniques to measure the activity contributes to the understanding of propane ODH and the identification of the role of different oxygen species bound to vanadium sites. For example, the simultaneous characterization of the catalyst under the same conditions by IR and Raman confirms that the V=O mode has the same frequency in both spectroscopies, and that bridging oxygen sites (V-O-V, V-O-Zr) present higher activity than terminal V=O bonds. These results demonstrate the high potential of the new simultaneous transmission IR-Raman operando rig to correlate the activity and the structure of catalysts, thus assisting the rational design of catalytic processes.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: T H Imentioning

confidence: 99%

See 2 more Smart Citations

Operando Reactor-Cell with Simultaneous Transmission FTIR and Raman Characterization (IRRaman) for the Study of Gas-Phase Reactions with Solid Catalysts

et al. 2020

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“…These fibrous structures combine less significant temperature gradients and lower pressure drop in a fixed bed reactor than those in powder form due to the high void fractions or bed porosity [3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Electrospun Nanofibers of Sr-La-Ce Oxides as Catalysts for the Oxidative Coupling of Methane

Sollier

Bonne

Khenoussi

et al. 2020

Ind. Eng. Chem. Res.

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Catalytic nanofibers composed of LaCe and Sr-LaCe oxides were synthetized by electrospinning method with 5 wt.% of Sr and different La/Ce molar ratios. The materials were obtained by calcining electrospun polymer composite fibers and were studied for the oxidative coupling of methane (OCM). The catalytic performance was compared with analogous Sr-LaCe powder catalysts. SEM micrographs of Sr-LaCe fibers (La/Ce: 0.1, 0.2, 1 and 3) showed nanostructures with homogenous and uniform diameters (170-200 nm). In addition, the XRD patterns revealed the formation of crystalline solid solutions like LaxCeyOz. The strontium enhanced the CH4 conversion and C2 selectivity, since it possibly generated structural defects that promote the formation of superoxide species. The SrLaCe3 nanofibers reached a CH4 conversion of 28.5 % and C2 yield of 21.7 % at 600 ºC. The nanofibers randomly packed improved the heat and mass transfer properties due to a high geometric surface ratio with high bed porosity.

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Recent advances in ZrO2 nanofibers: From structural design to emerging applications

Wang

Yin

et al. 2022

Sci. China Mater.

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One-dimensional (1D) zirconium dioxide nanofibers (ZrO 2 NFs), as an important inorganic material, have attracted significant attention because of their unique structural characteristics, outstanding chemical/thermal stability, and excellent optical/electronic properties. The biotemplate method, phase inversion method, centrifugal spinning, and electrospinning are facile and highly versatile approaches for the synthesis of ZrO 2 NFs, which have great potential in many emerging applications, such as thermal insulation, air filtration, water purification, catalyst supports, dye-sensitized solar batteries, and lithium-ion batteries. In this review, strategies for synthesizing ZrO 2 NFs with various structures, such as porous, hollow, layered, and even 3D selfassembled structures, are described and analyzed in detail. Recent revolutionary progress in mitigating the brittle nature of ceramics and constructing flexible ZrO 2 NFs, as well as their deformation mechanisms, is also discussed. Then, achievements concerning the application fields of ZrO 2 NFs in thermal insulation, environmental remediation, catalysis, and batteries are presented. Finally, we provide a comprehensive summary of the critical challenges and future perspectives on ZrO 2 NFs. This review is envisioned to guide future research on novel ZrO 2 NFs for emerging applications.

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Electrospun vanadium oxide based submicron diameter fiber catalysts. Part II: Effect of chemical formulation and dopants

Cited by 8 publications

References 19 publications

Operando Reactor-Cell with Simultaneous Transmission FTIR and Raman Characterization (IRRaman) for the Study of Gas-Phase Reactions with Solid Catalysts

Operando Reactor-Cell with Simultaneous Transmission FTIR and Raman Characterization (IRRaman) for the Study of Gas-Phase Reactions with Solid Catalysts

Synthesis and Characterization of Electrospun Nanofibers of Sr-La-Ce Oxides as Catalysts for the Oxidative Coupling of Methane

Recent advances in ZrO2 nanofibers: From structural design to emerging applications

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