Pt　nanoparticles　deposited　on　manganese　oxide-carbon　nanotubes　(Pt/MnO　x-CNTs)　are　prepared　by　a　microwave-assisted　polyol　method.　Their　structure　characterizations　are　carried　out　by　Fourier　transform　infrared　spectrometry　(FTIR),　thermogravimetric　analysis　(TGA),　X-ray　diffraction　(XRD),　transmission　electron　microscope　(TEM)　and　X-ray　photoelectron　spectroscopy　(XPS)　measurements,　indicating　that　MnOx　nanoparticles　cover　the　surface　of　CNTs　and　then　Pt　nanoparticles　are　uniformly　dispersed　on　MnO　x-CNTs　with　the　average　particle　size　of　about　2.2　nm.　Ethanol　oxidation　peak　current　on　Pt/MnOx-CNTs　(1141.4　mA　mg-1　Pt)　is　1.82　times　higher　than　that　on　Pt/CNTs　(626.4　mA　mg-1　Pt)　and　1.28　times　higher　than　that　on　PtRu/C　(JM)　(888.6　mA　mg-1　Pt).　The　Pt/MnOx-CNT　catalyst　presents　not　only　excellent　electrocatalytic　activity　and　very　high　stability　for　ethanol　oxidation,　but　also　high　tolerance　to　the　poisonous　carbonaceous　intermediates　generated　during　ethanol　oxidation　compared　to　Pt/CNT　catalyst.　This　is　attributed　to　the　excellent　proton　conductivity　of　MnOx　and　the　synergistic　effect　between　Pt　and　MnOx.　The　optimum　mass　ratio　of　MnOx　to　CNTs　is　1:1　in　the　Pt/MnOx-CNT　catalysts.　Copyright　©　2013,　Hydrogen　Energy　Publications,　LLC.