Three-dimensionally　ordered　macro-/mesoporous　alumina　(3DOM　Al2O3)-supported　cobalt　oxide　and　platinum　nanocatalysts　(xPt/yCo(3)O(4)/3DOM　Al2O3,　Pt　mass　fraction　(x%)　=　0-1.4%,　Co3O4　mass　fraction　(y%)　=　0-9.2%)　were　prepared　using　poly(methyl　methacrylate)　templating,　incipient　wetness　impregnation　and　polyvinyl　alcohol-protected　reduction.　The　resulting　xPt/yCo(3)O(4)/3DOM　Al2O3　samples　displayed　a　high-quality　3DOM　architecture　with　macropores　(180-200　nm　in　diameter)　and　mesopores　(4-6　nm　in　diameter)　together　with　surface　areas　in　the　range　of　94　to　102　m(2)/g.　Using　these　techniques,　Co3O4　nanoparticles　(NPs,　18.3　nm)　were　loaded　on　the　3DOM　Al2O3　surface,　after　which　Pt　NPs　(2.3-2.5　nm)　were　uniformly　dispersed　on　the　yCo(3)O(4)/3DOM　Al2O3.　The　1.3Pt/8.9Co(3)O(4)/3DOM　Al2O3　exhibited　the　best　performance　for　toluene　oxidation,　with　a　T-90%　value　(the　temperature　required　to　achieve　90%　toluene　conversion)　of　160　degrees　C　at　a　space　velocity　of　20000　mL　g(-1)　h(-1).　It　is　concluded　that　the　excellent　catalytic　performance　of　the　1.3Pt/8.9Co(3)O(4)/3DOM　Al2O3　is　owing　to　well-dispersed　Pt　NPs,　the　high　concentration　of　adsorbed　oxygen　species,　good　low-temperature　reducibility,　and　strong　interaction　between　the　Pt　and　Co3O4　NPs,　as　well　as　the　unique　bimodal　porous　structure　of　the　support.　(C)　2016,　Dalian　Institute　of　Chemical　Physics,　Chinese　Academy　of　Sciences.　Published　by　Elsevier　B.V.　All　rights　reserved.