title: Preparation and high catalytic performance of Au/3DOM Mn2O3 for the oxidation of carbon monoxide and toluene.
abstract: Three-dimensionally ordered macroporous (3DOM) Mn2O3 and its supported gold (xAu/3DOM Mn2O3, x=1.9-7.5wt%) nanocatalysts were prepared using the polymethyl methacrylate-templating and polyvinyl alcohol-protected reduction methods, respectively. The 3DOM Mn2O3 and xAu/3DOM Mn2O3 samples exhibited a surface area of 34-38m(2)/g. The Au nanoparticles (NPs) with a size of 3.0-3.5nm were uniformly dispersed on the skeletons of 3DOM Mn2O3. The 5.8Au/3DOM Mn2O3 sample performed the best, giving the T90% (the temperature required for a conversion of 90%) of -15°C at space velocity (SV)=20,000mL/(gh) for CO oxidation and 244°C at SV=40,000mL/(gh) for toluene oxidation. The apparent activation energies (30 and 54kJ/mol) over 5.8Au/3DOM Mn2O3 were much lower than those (80 and 95kJ/mol) over 3DOM Mn2O3 for CO and toluene oxidation, respectively. The effects of SV, water vapor, CO2, and SO2 on catalytic activity were also examined. It is concluded that the excellent catalytic performance of 5.8Au/3DOM Mn2O3 was associated with its high oxygen adspecies concentration, good low-temperature reducibility, and strong interaction between Au NPs and 3DOM Mn2O3 as well as high-quality porous architecture.
authors.affiliation: Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Shaohua
authors.initials: S
authors.lastname: Xie
authors.affiliation: Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, PR China. Electronic address: hxdai@bjut.edu.cn.
authors.forename: Hongxing
authors.initials: H
authors.lastname: Dai
authors.affiliation: Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, PR China. Electronic address: jgdeng@bjut.edu.cn.
authors.forename: Jiguang
authors.initials: J
authors.lastname: Deng
authors.affiliation: Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Huanggen
authors.initials: H
authors.lastname: Yang
authors.affiliation: Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Wen
authors.initials: W
authors.lastname: Han
authors.affiliation: Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Hamidreza
authors.initials: H
authors.lastname: Arandiyan
authors.affiliation: Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, PR China.
authors.forename: Guangsheng
authors.initials: G
authors.lastname: Guo
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D002248:Carbon Monoxide / Q000737:chemistry*; D002384:Catalysis; D006046:Gold / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D016062:Porosity; D017382:Reactive Oxygen Species / Q000737:chemistry; D013816:Thermodynamics; D014050:Toluene / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000393:Air Pollutants; D017895:Manganese Compounds; D010087:Oxides; D017382:Reactive Oxygen Species; D014050:Toluene; C027424:manganese oxide; D006046:Gold; D002248:Carbon Monoxide
keywords: Carbon monoxide oxidation; Supported gold catalyst; Three-dimensionally ordered macroporous manganese oxide; Toluene oxidation