fulltext.study @t Gmail

Cu–TiO2 systems for the photocatalytic H2 production: Influence of structural and surface support features

Paper ID Volume ID Publish Year Pages File Format Full-Text
45477 46412 2015 11 PDF Available
Title
Cu–TiO2 systems for the photocatalytic H2 production: Influence of structural and surface support features
Abstract

•We have studied the deposition of copper over different TiO2 supports.•Copper has been deposited by a chemical reduction method.•Support structural and textural properties induce important changes photoactivity.•Support surface condition the dispersion and oxidation state of Cu clusters.•Support chemical interaction with methanol also plays an important role.

The influence of different TiO2 supports on the Cu active species has been studied. It was found that the photocatalytic H2 evolution is highly affected by the structural and electronic features of surface Cu species. Thus, metal dispersion and oxidation state appears strongly conditioned by the structural and surface properties of the TiO2 support. We have examined three TiO2 supports prepared by different synthetic methods; sol–gel, hydrothermal and microemulsion. In addition, we have induced structural and surface modifications by sulfate pretreatment over freshly prepared TiO2 precursors and subsequent calcination. Notably different copper dispersion and oxidation state is obtained by using these different TiO2 supports. From the wide structural and surface analysis of the catalysts we are able to propose that the occurrence of highly disperse Cu2+ species, the sample surface area as well as the crystallinity of the TiO2 support are directly related to the photocatalytic activity for H2 production reaction.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Cu–TiO2; Photocatalysis; Metal dispersion; Oxidation state; H2 evolution
First Page Preview
Cu–TiO2 systems for the photocatalytic H2 production: Influence of structural and surface support features
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 179, December 2015, Pages 468–478
Authors
, , , , ,
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