Three-dimensionally　ordered　mesoporous　Co3O4　(meso-Co3O4)　and　its　supported　gold　(xAu/meso-Co3O4,　x　=　3.7-9.0　wt%)　nanocatalysts　were　prepared　using　the　KIT-6-templating　and　polyvinyl　alcohol-protected　colloidal　deposition　methods,　respectively.　The　meso-Co3O4　and　xAu/meso-Co3O4　samples　exhibited　a　high　surface　area　of　91-94　m2/g.　The　Au　nanoparticles　with　a　size　of　1-5　nm　were　uniformly　deposited　inside　the　mesoporous　channels　of　meso-Co3O4.　There　were　good　correlations　of　oxygen　adspecies　concentration　and　low-temperature　reducibility　with　catalytic　activity　of　the　sample　for　CO　or　BTX　(benzene,　toluene,　and　o-xylene)　oxidation.　Among　meso-Co3O4　and　xAu/rneso-Co3O4,　the　6.5Au/mesoCo(3)O(4)　sample　performed　the　best,　giving　the　T905　(the　temperature　required　for　achieving　a　CO　or　BTX　conversion　of　90%)　of　-45,　189,　138,　and　162　C　for　the　oxidation　of　CO,　benzene,　toluene,　and　o-xylene,　respectively.　The　apparent　activation　energies　(23　and　45-55　kJ/mol)　over　6.5Au/meso-Co3O4　were　much　lower　than　those　(48　and　72-92　kj/mol)　over　bulk　Co3O4　for　CO　and　BTX　oxidation,　respectively.　The　effects　of　water　vapor,　carbon　dioxide,　and　sulfur　dioxide　on　the　catalytic　activity　of　the　6.5Au/mesoCo(3)O(4)　sample　were　also　examined.　It　is　concluded　that　the　higher　surface　area　and　oxygen　adspecies　concentration,　better　low-temperature　reducibility,　and　strong　interaction　between　Au　and　meso-Co3O4　were　responsible　for　the　excellent　catalytic　performance　of　6.5Au/meso-Co3O4.　(C)　2013　Elsevier　Inc.　All　rights　reserved.