Electrocatalyst　for　oxygen-reduction　reaction　(ORR)　is　crucial　for　metal-air　batteries,　in　which　Pt-based　materials　are　the　benchmark　catalysts　for　ORR.　However,　the　high　cost　and　limited　supplies　of　Pt　limit　its　broad　use　in　commercial　applications.　Designing　highly　efficient　Pt　electrocatalysts　can　reduce　material　cost　and　enable　commercial　success　for　a　wide　variety　of　electrochemical　technologies.　Herein,　we　prepared　Pt/MnOx　and　Pt/MnO　electrocatalysts　via　deposition-precipitation　and　H-2-reduction　approaches.　The　Pt　mass　activities　towards　the　ORR　at　0.7　V　for　the　Pt/MnOx,　and　Pt/MnO　catalysts　were　4.0　and　3.7　A　mg(Pt)(-1),　respectively,　which　were　20,　and　18.5　times　as　commercial　20%　Pt/C　catalyst.　The　transferred　electron　numbers　(n)　were　3.6　and　4.0　for　Pt/MnOx　and　Pt/MnO,　respectively.　Moreover,　Pt/MnO　catalyst　exhibited　a　good　ORR　stability　after　500　cycles　compared　to　Pt/MnOx　catalyst　in　0.1　M　KOH.