Table of Contents
Indian Journal of Materials Science
Volume 2015, Article ID 658346, 10 pages
http://dx.doi.org/10.1155/2015/658346
Research Article

Enhanced Catalytic Activity of Supported Gold Catalysts for Oxidation of Noxious Environmental Pollutant CO

1Department of Applied Sciences (Chemical Science Division), GUIST, Gauhati University, Guwahati, Assam 781014, India
2Nano Catalysis, Catalytic Conversion and Process Division, CSIR-Indian Institute of Petroleum, Mohkampur, Dehradun 248005, India

Received 28 May 2015; Accepted 13 August 2015

Academic Editor: Jose L. Endrino

Copyright © 2015 Pranjal Saikia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Noble metal nanomaterials have attracted mounting research attention for applications in diverse fields of catalysis, biology, and nanotechnology. In the present study, we have undertaken a detailed investigation on synthesis, characterization, and catalytic activity studies for CO oxidation by nanogold catalysts supported over CeO2 and CeO2-ZrO2 (1 : 1 mole ratio). The support systems were prepared by modified, simple precipitation technique and the Au supported samples were synthesized using deposition-precipitation with urea method. The physicochemical characterization was performed by XRD, ICP-AES, BET surface area, FT-IR, UV-Vis DRS, Raman Spectroscopy, TEM, and XPS techniques. Au/CeO2 catalyst showed more than 80% CO conversions at 30°C, whereas Au/CeO2-ZrO2 exhibited ~100% CO conversion at that temperature. The catalytic performance of Au catalysts is highly dependent on the nature of the support.