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Photocatalytic H2 production from aqueous methanol solutions using metal-co-catalysed Zn2SnO4 nanostructures

Paper ID Volume ID Publish Year Pages File Format Full-Text
44811 46360 2016 10 PDF Available
Title
Photocatalytic H2 production from aqueous methanol solutions using metal-co-catalysed Zn2SnO4 nanostructures
Abstract

•Highly crystalline nanosized Zn2SnO4 has been obtained by hydrothermal synthesis.•Zn2SnO4 itself shows activity for hydrogen production from methanol aqueous solutions.•When Pt is used as co-catalyst, the H2 production is dramatically improved.•This enhancement has been addressed to a decrease of the charge recombination rates due to the electron scavenging ability of Pt NPs.•Au nanoparticles show little activity as co-catalysts for H2 evolution reaction.

The activity of nanocrystalline Zn2SnO4 for photocatalytic hydrogen production from methanol aqueous solutions has been explored. A co-precipitation method starting from metal salts and a mild base as precipitating agent was used to obtain highly crystalline nanosized Zn2SnO4 with cubic inverse spinel structure. In-situ photodeposition of Pt and Au nanoparticles as co-catalysts was performed prior to the photocatalytic reaction. The obtained materials have been characterised by XRD, TEM, N2 adsorption isotherms and ICP-OES, Raman, UV–vis and photoluminescence spectroscopies. Bare Zn2SnO4 gives rise to hydrogen release from a methanol aqueous solution without catalyst deactivation. This photocatalytic activity is remarkably increased with the deposition of platinum. In contrast, the use of gold as co-catalyst increases the activity only slightly, with a lower hydrogen production than a Pt-loaded sample with the same nominal metal content. An improved charge separation and the activity of Pt as hydrogen evolution catalyst are invoked to account for the present findings.

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Keywords
Photocatalytic H2 production; ZnSn2O4; Co-catalyst; Pt; Au
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Photocatalytic H2 production from aqueous methanol solutions using metal-co-catalysed Zn2SnO4 nanostructures
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 191, 15 August 2016, Pages 106–115
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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
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