Three-dimensionally　ordered　macroporus　LaMnAl11O19　(3DOM　LMAO)　and　its　supported　Pd,　Pd-Pt,　and　Pt　nanoparticles　were　prepared　using　the　polymethyl　methacrylate-templating　and　polyvinyl　alcohol-protected　reduction　methods,　respectively.　The　1100　degrees　C-calcined　3DOM　LMAO　support　possessed　a　hexaaluminate　phase,　and　its　supported　noble　metal　samples　displayed　a　high　surface　area　of　26-29　m(2)/g.　A　Pd-Pt　alloy　was　generated　in　the　PdPt/3DOM　LMAO　samples,　and　the　particle　sizes　of　the　noble　metal　nanoparticles　(NPs)　were　3-5　nm.　The　0.97　wt%　Pd/3DOM　LMAO　(0.97　P　d/3DOM　LMAO)　sample　possessed　the　highest　surface　adsorbed　oxygen　concentration　and　the　best　low-temperature　reducibility,　showing　the　highest　catalytic　activity　(T-10%　=　259　degrees　C,　T-50%　=　308　degrees　C,　and　T-90%　=　343　degrees　C　at　SV　=　20,000　mL/(g　h))　for　methane　combustion.　The　1.14　wt%　Pd2.8Pt/3DOM　LMAO　(1.14Pd(2.8)Pt/3DOM　LMAO)　sample　performed　the　best　(T-10%　=　284　degrees　C,　T-50%　=　372　degrees　C,　and　T-90%　=　456　degrees　C　at　SV　=　20,000　mL/(g　h))　among　the　PdPt/3DOM　LMAO　samples.　Doping　of　Pt　to　the　Pd-based　catalyst　could　improve　the　H2O-,　CO2-,　and　SO2-resistant　ability　without　significant　influence　on　thermal　stability,　although　1.14Pd(2.8)Pt/3DOM　LMAO　was　less　active　than　0.97　P　d/3DOM　LMAO　for　methane　combustion.　The　ex　situ　X-ray　photoelectron　spectroscopy　was　used　to　explore　the　formation　of　active　PdO　species　during　the　oxidation　processes　of　Pd　in　1.14Pd(2.8)Pt/3DOM　LMAO　and　0.97Pd/3DOM　LaMnAl11O19　at　different　temperatures.