02430nas a2200241   4500008004100000022001400041245015300055210006900208260007300277300001200350490000800362520146900370653001301839653002901852653004101881653002301922653003401945100002601979700001802005700001802023700001902041856012802060       2008                        eng d  a0926-860X00aNano-gold supported on Fe2O3: a highly active catalyst for low temperature oxidative destruction of methane green house gas from exhaust/waste gases0 aNanogold supported on Fe2O3 a highly active catalyst for low tem  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcNOV  a186-1900 v3503 a<p>A number of nano-gold catalysts were prepared by depositing gold on different metal oxides (viz. Fe2O3, Al2O3, Co3O4, MnO2, CeO2, MgO, Ga2O3 and TiO2), using the homogeneous deposition precipitation (HDP) technique. The catalysts were evaluated for their performance in the combustion of methane (1 mol% in air) at different temperatures (300-600 degrees C) for a GHSV of 51,000 h(-1). The supported nano-gold catalysts have been characterized for their gold loading (by ICP) and gold particle size (by TEM/HRTEM or XRD peak broadening). Among these nano-gold catalysts, the Au/Fe2O3 (Au loading = 6.1% and Au particle size = 8.5 nm) showed excellent performance. For this catalyst, temperature required for half the methane combustion was 387 degrees C, which is lower than that required for Pd(1%)/Al2O3 (400 degrees C) and Pt(1%)/Al2O3 (500 degrees C) under identical conditions. A detailed investigation on the influence of space velocity (GHSV = 10,000-100,000 cm(3) g(-1) h(-1)) at different temperatures (200-600 degrees C) on the oxidative destruction of methane over the Au/Fe2O3 catalyst has also been carried out. The Au/Fe2O3 catalyst prepared by the HDP method showed much higher methane combustion activity than that prepared by the conventional deposition precipitation (DP) method. The XPS analysis showed the presence of Au in the different oxidation states (Au-0, Au1+ and Au3+) in the catalyst. (C) 2008 Elsevier B.V. All rights reserved.</p>10aAu/Fe2O310aDeposition precipitation10aHomogeneous deposition precipitation10aMethane combustion10aSupported nano-gold catalysts1 aChoudhary, Vasant, R.1 aPatil, V., P.1 aJana, Prabhas1 aUphade, B., S.  uhttps://library.ncl.res.in/content/nano-gold-supported-fe2o3-highly-active-catalyst-low-temperature-oxidative-destruction-0