Three-dimensionally　ordered　macroporous　CeO2　(3DOM　CeO2)　and　its　supported　Pd@Co　(CoxPd/3DOM　CeO2,　x　(Co/Pd　molar　ratio)　=　2.4-13.6)　nanocatalysts　were　prepared　using　the　polymethyl　methacrylate-templating　and　modified　polyvinyl　alcohol-protected　reduction　methods,　respectively.　The　Pd@Co　particles　displayed　a　core-shell　(core:　Pd;　shell:　Co)　structure　with　an　average　size　of　3.5-4.5　nm　and　were　well　dispersed　on　the　surface　of　3DOM　CeO2.　The　CoRd/3DOM　CeO2　samples　exhibited　high　catalytic　performance　and　super　stability　for　methane　oxidation,　with　the　Co3.5Pd/3DOM　CeO2　sample　showing　the　highest　activity　(T-90%　=　480　C　at　space　velocity　of　40,000　mL/(g　h)　and　excellent　stability　in　the　temperature　range　400-800　degrees　C.　The　apparent　activation　energies　(58-73　kJ/mol)　obtained　over　CoxPd/3DOM　CeO2　were　much　lower　than　those　(104-112　kJ/mol)　over　Co/3DOM　CeO2　and　3DOM　CeO2　for　methane　oxidation,　with　the　Co3.5Pd/3DOM　CeO2　sample　possessing　the　lowest　apparent　activation　energy　(58　kJ/mol).　It　is　concluded　that　the　excellent　catalytic　performance　of　Co3.5Pd/3DOM　CeO2　was　associated　with　its　good　abilities　to　adsorb　oxygen　and　methane　as　well　as　the　unique　core-shell　structure　of　CoPd　nanoparticles.　(C)　2016　Elsevier　Inc.　All　rights　reserved.