Three-dimensionally　ordered　macroporous　(3DOM)　Mn2O3　and　its　supported　gold　(xAu/3DOM　Mn2O3,　x　=　1.9-7.5　wt%)　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　34-38　m(2)/g.　The　Au　nanoparticles　(NPs)　with　a　size　of　3.0-3.5　nm　were　uniformly　dispersed　on　the　skeletons　of　3　DOM　Mn2O3.　The　5.8Au/3DOM　Mn2O3　sample　performed　the　best,　giving　the　T-90%　(the　temperature　required　for　a　conversion　of　90%)　of　-15　degrees　C　at　space　velocity　(SV)　=　20,000　mL/(g　h)　for　CO　oxidation　and　244　degrees　C　at　SV　=　40,000　mL/(g　h)　for　toluene　oxidation.　The　apparent　activation　energies　(30　and　54　kJ/mol)　over　5.8Au/3DOM　Mn2O3　were　much　lower　than　those　(80　and　95　kJ/mol)　over　3　DOM　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.　(C)　2014　Elsevier　B.V.　All　rights　reserved.