fulltext.study @t Gmail

Mechanistic study of acidic and basic sites for CO oxidation over nano based Co2−xFexWO6 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
47857 46483 2009 9 PDF Available
Title
Mechanistic study of acidic and basic sites for CO oxidation over nano based Co2−xFexWO6 catalysts
Abstract

This paper deals with systematic study of MIMIIWO6 (MI = Co and MII = Fe) mixed oxide catalysts for carbon monoxide (CO) oxidation. The catalysts were prepared by polymer based citrate sol–gel method and characterized by X-ray diffraction, thermal analysis, infrared spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The average particle size calculated using TEM studies were found to be in the range 20–40 nm. DC electrical conductivity showed phase transition from extrinsic to intrinsic behaviour. The ammonia and carbon dioxide adsorption over these catalysts surfaces were used as a probe to confirm the acidic and basic sites. The acidic and basic sites ascertained by temperature programmed desorption (TPD) studies carried out using thermogravimetry and differential scanning calorimetry technique. The presence of acidic and basic sites in equal ratio on the catalyst surface exhibited better CO oxidation activity as compared to unequal number of sites. The equal affinity for CO adsorption over acidic and O2 on basic sites were found to be essential criteria for catalytic CO oxidation reaction.

Keywords
Citrate precursor; Cobalt tungstate; Iron tungstate; Temperature programmed desorption; Carbon monoxide oxidation; Acidic sites; Basic sites
First Page Preview
Mechanistic study of acidic and basic sites for CO oxidation over nano based Co2−xFexWO6 catalysts
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 89, Issues 1–2, 3 July 2009, Pages 246–254
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