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Platinum loaded sodium tantalate photocatalysts prepared by a flux method for photocatalytic steam reforming of methane

Paper ID Volume ID Publish Year Pages File Format Full-Text
38801 45791 2016 8 PDF Available
Title
Platinum loaded sodium tantalate photocatalysts prepared by a flux method for photocatalytic steam reforming of methane
Abstract

•La doped NaTaO3 photocatalyst was successfully prepared by a flux method using a sodium chloride flux at various preparation conditions.•The crystallites size of NaTaO3 was much affected by the La doping amount and the solute concentration in the flux method.•Among the Pt-loaded photocatalysts, a positive linear correlation was observed between the size of NaTaO3 crystallite and the hydrogen production rate in photocatalytic steam reforming of methane.•When we compared the catalysts having the same crystallite size, the sample prepared by the flux method showed higher photocatalytic activity than the catalyst prepared without the flux.

Lanthanum-doped sodium tantalate samples (NaTaO3:La) were prepared by a flux method using a sodium chloride flux with various parameters, such as presence or absence of the flux, solute concentration, hold temperature, and amount of lanthanum doping. SEM images showed cubic and rectangular shapes for the samples prepared by the flux method, somewhat rounded shape for the sample prepared in the absence of the flux, and large particles for the sample without lanthanum doping. Among the parameters, the lanthanum doping and solute concentration much influenced the crystallites size of the NaTaO3:La samples. Most of these NaTaO3:La samples loaded with platinum cocatalyst exhibited the photocatalytic activity in the photocatalytic steam reforming of methane around room temperature. Among them, the highest activity was obtained by the Pt/NaTaO3:La sample prepared by the flux method with moderate solute concentration, enough high hold temperature, and moderate amount of platinum and lanthanum doping. A positive correlation was found between the crystallite size and the photocatalytic activity. When we compared the catalysts having the same crystallite size, the sample prepared by the flux method showed higher photocatalytic activity than the catalyst prepared without the flux. It is suggested that the difference in the shape of particle would be important factor for the photocatalytic activity.

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Keywords
Photocatalytic steam reforming of methane; Hydrogen production; Sodium tantalite; Flux method; Molten salt method
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Platinum loaded sodium tantalate photocatalysts prepared by a flux method for photocatalytic steam reforming of methane
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 521, 5 July 2016, Pages 125–132
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us