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Catalytic combustion of formaldehyde on gold/iron-oxide catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
52059 46864 2008 7 PDF Available
Title
Catalytic combustion of formaldehyde on gold/iron-oxide catalysts
Abstract

A series of gold/iron-oxide catalysts for catalytic combustion of formaldehyde were prepared by co-precipitation. The catalyst containing 7.10 wt% of gold exhibited the highest catalytic activity. On this catalyst, the catalytic combustion reaction of formaldehyde proceeded at considerable rates at 20 °C and complete burn-off of formaldehyde was achieved at 80 °C. The catalysts were stable and remained active in the presence of moisture and are good substitutes for the noble metals (Pt, Pd) catalysts. The structure of catalysts, the valence state of gold and the size of gold particles were investigated by X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy techniques. Gold atoms with fractional positive charge (Auδ+) were found to exist in the catalyst and play an important role in the catalytic activity. Interaction between active species and support also provided important contribution to the valence state of gold and the activity for the catalytic combustion of HCHO.

Keywords
Gold/iron-oxide catalyst; Catalytic combustion of formaldehyde; Oxidation state; Gold nanocrystals
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 3, 1 March 2008, Pages 355–361
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
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