Three-dimensionally　ordered　macroporous　(3DOM)　Mn2O3-supported　AuPdy　alloy　(xAuPd(y)/3DOM　Mn2O3;　x=　1.0-3.8　w%;　Pd/Au　molar　ratio　:　y　=1.85,　1.92)　catalysts　were　prepared　using　the　polymethyl　methacrylate-templating　and　polyvinyl　alcohol-protected　redudion　methods,　respectively.　Physicochemical　properties　of　the　samples　were　characterized　by　means　of　numerous　techniques,　and　their　catalytic　activities　were　evaluated　for　toluene　oxidation.　It　is　found　that　the　AuPdy　alloy　nanoparticles　(NPs)　with　an　particle　size　of　2-4　nm　were　uniformly　dispersed　on　the　surface　of　3DOM　Mn2O3,　and　the　3.8AuPd(1.92)/3DOM　Mn2O3　sample　performed　the　best:.　the　temperature　at　90%　toluene　conversion　was　162　degrees　C　at　40,000　mL/(g　h).　Furthermore,　the　3.8AuPd(1.92)/3DOM　Mn2O3　sample　was　highly　active　even　after　calcination　at　700　degrees　C.　The　introduction　of　water　vapor　to　the　feedstock　induced　a　positive　effect　on　toluene　oxidation　over　3.8AuPd(1.92)/3DOM　Mn2O3,　but　a　negative　effect　over　1.9Au/3DOM　Mn2O3　or　1.9Pd/3DOM　Mn2O3.　The　excellent　catalytic　activity,　thermal　stability,　and　water　resistance　of　3.8AuPd(1.92)/3DOM　Mn2O3　were　associated　with　its　good　activation　adsorption　of　oxygen　on　AuPd1.92　NPs　and　strong　interaction-between　noble　metal　NPs　and　3DOM　Mn2O3.　The　3DOM　Mn2O3-supported　AuPdy　alloy　NPs　are　promising　industrial　catalysts　for　efficient　removal　of　volatile　organic　compounds.　(C)　2015　Elsevier　B.V.　All　rights　reserved.