Oxidative steam reforming of methanol for hydrogen production over Cu/CeO<sub>2</sub>-ZrO<sub>2</sub>catalysts

Pérez-Hernández, R.; Longoria, L.C.; Palacios, Javier; Aguila, Ma. M.; Rodríguez, Vicente

doi:10.1179/174892309x12580263894045

Cited by 14 publications

(4 citation statements)

References 25 publications

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“…The degree of the diffraction peak shis of the cubic-CeO 2 or tetragonal-ZrO 2 assigned to 2q ¼ 29 before and aer the APR reaction were found to be smaller for Pt/CeO 2 -ZrO 2 (4) than other catalysts, as shown in ESI Table S2, † which may be assigned to the formation of solid solutions such as Zr 0.84 Ce 0.16 O 2 and Zr 0.4 Ce 0.6 O 2 phases. 37 This observation also suggests the thermally stable CeO 2 -ZrO 2 phase formation on the CeO 2 -ZrO 2 (4) support. The phase transformations also greatly altered the numbers of oxygen vacancy defect sites on the CeO 2 -ZrO 2 mixed oxide supports.…”

Section: Effect Of Metal-support Interaction On the Activity Of The Pmentioning

confidence: 85%

Aqueous phase reforming of ethylene glycol on Pt/CeO₂–ZrO₂: effects of cerium to zirconium molar ratio

et al. 2015

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The aqueous-phase reforming (APR) reaction of ethylene glycol was investigated on platinum-supported CeO 2 -ZrO 2 mixed oxides with different molar ratios of Ce/(Ce + Zr). The main role of the molar ratio of Ce/(Ce + Zr) on the CeO 2 -ZrO 2 mixed oxides was found to be to alter the dispersion of active platinum crystallites and concomitantly change the hydrogen productivity and stability. The different amounts of surface oxygen species on the defect sites of CeO 2 -ZrO 2 altered the dispersion of platinum crystallites and changed the metal-support interactions between the nano-scale platinum crystallites and the oxygen vacancy defect sites on the CeO 2 -ZrO 2 . A larger dispersion of platinum crystallites and a larger surface area were observed for the Pt/CeO 2 -ZrO 2 having a Ce/(Ce + Zr) molar ratio of 4 : 6, and the catalyst showed a higher conversion of ethylene glycol to hydrogen by forming thermally stable platinum crystallites through their strong interactions with the defect sites of the CeO 2 -ZrO 2 surface.

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Section: Effect Of Metal-support Interaction On the Activity Of The Pmentioning

confidence: 85%

Aqueous phase reforming of ethylene glycol on Pt/CeO₂–ZrO₂: effects of cerium to zirconium molar ratio

et al. 2015

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“…Cerium oxide or ceria (CeO 2 ) is a fluorite type oxide of significant relevance and interest in a wide range of applications, such as a redox component, oxygen buffer, three-way catalysts currently used in exhaust-gas converters of gasoline-fueled vehicles and more recently, in the production of hydrogen for fuel cells. [1][2][3][4][5][6][7][8] Depending on its application, several processes have been developed in the synthesis of ceria, and therefore different morphologies and size/shape particles of this oxide have been obtained. 9 Nowadays it is well known that the final properties of ceria are strongly dependent on their structural characteristics like crystalline array, morphology, particle size and chemical composition.…”

Section: Introductionmentioning

confidence: 99%

A novel synthesis method to produce silver-doped CeO2 nanotubes based on Ag nanowire templates

Mondragón‐Galicia

Pérez-Hernández

Gutiérrez-Wing

et al. 2011

Phys. Chem. Chem. Phys.

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Silver nanowires were used as templates to synthesize silver-doped CeO(2) (Ag-CeO(2)) nanotubes by the precipitation method. The precipitated solid was dried at 100 °C for 24 h and calcined at 500 °C for 5 h. A TEM, HRTEM, LV-SEM and XRD study was carried out to determine the micro and nanostructural characteristics of the samples. LV-SEM analysis allowed us to observe microtubular empty structures constituted by Ce, O and Ag as indicated by EDS. These tubular structures, with an external diameter from 120 to 280 nm and an internal diameter from 40 to 80 nm, were mainly composed of 11 nm ceria nanoparticles. This kind of structures was obtained when CeO(2) nanoparticles covered the Ag nanowires during the synthesis. Due to the presence of ammonium hydroxide used during the synthesis, a fraction of the silver nanowire reacts and Ag atoms begin to migrate outside the ceria microtube. When the sintering process is applied, the Kirkendall effect can occur. So, out-diffusion of the remnant Ag through the interface is faster than the in-diffusion of the shell material (CeO(2)), which eventually results in a coaxial nanotube on completion of the non-equilibrium interdiffusion, leaving the central core completely empty, driving the formation of hollow tubular Ag-CeO(2) structures as a result.

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“…In the literature, copper based catalysts have received considerable attention for H 2 production by steam reforming of methanol (SRM) or oxidative steam reforming of methanol (OSRM) [3][4][5][6][7]. However, in recent times gold-base catalysts have been extensively studied in connection with the advancement in fuel cell technology and related hydrogen fuel processing.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production by Steam Reforming of Methanol over New Ag-Au(1-D)-CeO₂ Catalyst

2010

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A Ag-Au(1-D)-CeO 2 catalyst was prepared by precipitation method using Ag-Au nanowires and Ce(NO 3 ) 3 ⋅6H 2 O as precursors. The catalytic activity of the catalysts was evaluated in a steam reforming of methanol (SRM) reaction from 250 to 475 °C. 100 % of methanol conversion was observed at 450 °C together with high H 2 selectivity. This study evidenced that the use of 1-D metallic nanostructures could be used as an active phase on a CeO 2 matrix for steam reforming of methanol for H 2 generation to be used as fuel.

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Oxidative steam reforming of methanol for hydrogen production over Cu/CeO₂-ZrO₂catalysts

Cited by 14 publications

References 25 publications

Aqueous phase reforming of ethylene glycol on Pt/CeO₂–ZrO₂: effects of cerium to zirconium molar ratio

Aqueous phase reforming of ethylene glycol on Pt/CeO₂–ZrO₂: effects of cerium to zirconium molar ratio

A novel synthesis method to produce silver-doped CeO2 nanotubes based on Ag nanowire templates

Hydrogen Production by Steam Reforming of Methanol over New Ag-Au(1-D)-CeO₂ Catalyst

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Oxidative steam reforming of methanol for hydrogen production over Cu/CeO2-ZrO2catalysts

Cited by 14 publications

References 25 publications

Aqueous phase reforming of ethylene glycol on Pt/CeO2–ZrO2: effects of cerium to zirconium molar ratio

Aqueous phase reforming of ethylene glycol on Pt/CeO2–ZrO2: effects of cerium to zirconium molar ratio

A novel synthesis method to produce silver-doped CeO2 nanotubes based on Ag nanowire templates

Hydrogen Production by Steam Reforming of Methanol over New Ag-Au(1-D)-CeO2 Catalyst

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Product

Resources

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Oxidative steam reforming of methanol for hydrogen production over Cu/CeO₂-ZrO₂catalysts

Aqueous phase reforming of ethylene glycol on Pt/CeO₂–ZrO₂: effects of cerium to zirconium molar ratio

Aqueous phase reforming of ethylene glycol on Pt/CeO₂–ZrO₂: effects of cerium to zirconium molar ratio

Hydrogen Production by Steam Reforming of Methanol over New Ag-Au(1-D)-CeO₂ Catalyst