Three-dimensionally　ordered　mesoporous　Co3O4　(meso-Co3O4)　and　its　supported　Au,　Pd,　and　Au-Pd　alloy　(xAu(y)Pd/meso-Co3O4;　x　=　0.43-2.94　wt%;　Au/Pd　molar　ratio　(y)　=　0.43-0.50)　nanocatalysts　were　prepared　using　the　KIT-6-templating　and　polyvinyl　alcohol-protected　reduction　methods,　respectively.　It　is　found　that　the　meso-Co3O4　with　a　high　surface　area　of　106　m(2)/g　was　cubic　in　crystal　structure　and　the　noble　metal　nanoparticles　(NPs)　with　a　size　of　2.7-4.5　nm　were　uniformly　dispersed　on　the　surface　of　meso-Co3O4.　The　2.94Au(0.50)Pd/meso-Co3O4　sample　performed　the　best　for　methane　combustion,　showing　the　T-10%,　T-50%,　and　T-90%　(temperatures　required　for　achieving　methane　conversions　of　10%,　50%,　and　90%)　of　230,　280,　and　324　degrees　C　at　a　space　velocity　of　20,000　mL/(g　h)　and　the　lowest　apparent　activation　energy　of　44.4　kJ/mol.　Furthermore,　the　effects　of　CO2,　SO2,　and　H2O　addition　on　the　catalytic　stability　of　2.94Au(0.50)Pd/meso-Co3O4　were　also　examined.　It　is　concluded　that　the　excellent　catalytic　performance　of　2.94Au(0.50)Pd/meso-Co3O4　was　associated　with　its　porous　structure,　high　adsorbed　oxygen　species　concentration,　good　low-temperature　reducibility,　and　strong　interaction　between　Au-Pd　alloy　NPs　and　meso-Co3O4.　(C)　2015　Elsevier　Inc.　All　rights　reserved.