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Clay-based SiO2 as active support of gold nanoparticles for CO oxidation catalyst: Pivotal role of residual Al

Paper ID Volume ID Publish Year Pages File Format Full-Text
50135 46781 2013 4 PDF Available
Title
Clay-based SiO2 as active support of gold nanoparticles for CO oxidation catalyst: Pivotal role of residual Al
Abstract

SiO2 is generally regarded as an “inert” support of gold catalysts for CO oxidation. We find that silica obtained from a natural clay mineral can be used as excellent gold-support for efficient CO oxidation at relatively low temperature. Fine Au particles are found to locate around the Al sites, rather than on pure SiO2 area. Accordingly, high Au loading and catalytic activity for the clay-based SiO2 supports are ascribed to the residual aluminum originally from the clay.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► SiO2 from a natural clay can be used as excellent Au-support for efficient CO oxidation. ► The prepared catalysts have notable Au loading and considerable oxidation activity. ► The fine Au particles are found to locate around the Al sites. ► Al sites are able to help to form and stabilize Au nanoparticle on surface.

Keywords
Gold catalyst; Clay minerals; CO oxidation; CP method
First Page Preview
Clay-based SiO2 as active support of gold nanoparticles for CO oxidation catalyst: Pivotal role of residual Al
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 35, 5 May 2013, Pages 72–75
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis