Three-dimensionally　ordered　macroporous　(3DOM)　Eu0.6Sr0.4FeO3-supported　cobalt　oxide　nanocatalysts　(yCoO(x)/3DOM-ESFO;　y　wt%　=　1,　3,　6,　and　10)　were　prepared　using　the　incipient　wetness　impregnation　method.　Physicochemical　properties　of　the　composite　materials　were　characterized　by　means　of　numerous　techniques,　and　their　catalytic　performance　was　evaluated　for　the　combustion　of　toluene.　It　is　shown　that　all　of　the　samples　displayed　a　well-defined　3DOM　architecture　with　a　surface　area　of　22-31　m(2)　g(-1)　and　the　loaded　cobalt　oxide　nanoparticles　with　a　diameter　of　7-11　nm　were　well　dispersed　on　the　surface　of　the　3DOM-ESFO　support.　Among　the　yCoO(x)/3DOM-ESFO　samples,　the　3CoO(x)/3DOM-ESFO　and　6CoO(x)/3DOM-ESFO　ones　possessed　the　highest　oxygen　adspecies　concentration　and　the　best　reducibility　at　low　temperature,　and　hence　showing　the　best　catalytic　performance　(the　temperatures　required　for　50　and　90%　toluene　conversions　were　ca.　250　and　270　degrees　C　at　a　space　velocity　of　20,000　mL　g(-1)　h(-1),　respectively)　for　toluene　combustion.　The　apparent　activation　energies　(ca.　72　kJ　mol(-1))　of　3CoO(x)/3DOM-ESFO　and　6CoO(x)/3DOM-ESFO　were　lower　than　that　(81　kJ　mol(-1))　of　3DOM-ESFO.　It　is　concluded　that　the　enhanced　catalytic　performance　of　3CoO(x)/3DOM-ESFO　and　6CoO(x)/3DOM-ESFO　for　toluene　combustion　was　mainly　related　to　their　higher　oxygen　adspecies　concentrations,　stronger　reducibility　at　low　temperature,　and　better　dispersion　of　cobalt　oxide　nanoparticles.　(C)　2012　Elsevier　B.V.　All　rights　reserved.