Three-dimensionally　ordered　macro-/mesoporous　26.9　wt%　CeO2-Al2O3　(denoted　as　3DOM　26.9CeO(2)-Al2O3)-supported　noble　metal　nanocatalysts　(xM/3DOM　26.9CeO(2)-Al2O3,　x=0.27-0.81　wt%;　M　=　Au,　Ag,　Pd,　and　Pt)　were　prepared　using　the　polymethyl　methacrylate-templating　and　polyvinyl　pyrrolidone-　or　polyvinyl　alcohol-protected　reduction　methods,　respectively.　It　is　shown　that　the　xM/3DOM　26.9CeO(2)-Al2O3　samples　displayed　a　high-quality　3DOM　architecture　with　a　bimodal　pore　(macropore　size　=　180-200　nm　and　mesopore　size　=　4-6　nm)　structure　and　a　surface　area　of　102-108　m(2)/g,　with　the　noble　metal　nanoparticles　(3-4　nm　in　size)　being　highly　dispersed　on　the　3DOM　26.9CeO(2)-Al2O3　surface.　The　0.27Pt/3DOM　26.9CeO(2)-Al2O3　sample　performed　the　best　(T-90%　=　198　degrees　C　at　space　velocity　=　20,000　mL/(g　h))　for　toluene　oxidation.　The　addition　of　moisture　to　the　feedstock　induced　a　positive　effect　on　catalytic　activity.　The　apparent　activation　energies　obtained　over　the　xM/3DOM　26.9CeO(2)-Al2O3　samples　were　in　the　range　of　46-100　kJ/mol,　with　the　0.27Pt/3DOM　26.9CeO(2)-Al2O3　sample　possessing　the　lowest　apparent　activation　energy.　It　is　concluded　that　the　good　catalytic　performance　of　0.27Pt/3DOM　26.9CeO(2)-Al2O3　was　associated　with　its　higher　adsorbed　oxygen　species　concentration,　better　low-temperature　reducibility,　and　stronger　interaction　between　Pt　and　3DOM　26.9CeO(2)-Al2O3　as　well　as　the　unique　bimodal　porous　structure.　(C)　2015　Elsevier　B.V.　All　rights　reserved.