Transition　metal　oxide　nanomaterials　or　nanocomposites　containing　transition　metal　oxides　have　the　potential　to　replace　traditional　catalysts　for　electrochemical　applications,　photocatalysis,　and　energy　storage.　Amorphous　manganese　oxide　catalysts　were　prepared　via　photochemical　metal-organic　deposition　(PMOD).　Through　XRD,　SEM-EDS,　Raman　spectroscopy,　FTIR　spectroscopy,　HRTEM-EDS,　and　XPS,　we　confirmed　that　amorphous　manganese　oxide　catalysts　were　successfully　prepared.　Amorphous　catalysts　prepared　with　different　photolysis　times　were　compared　in　terms　of　their　performance　for　the　oxygen　reduction　reaction　(ORR)　and　oxygen　evolution　reaction　(OER),　and　catalyst　MnOx-PMOD48　showed　the　best　performance　because　of　its　high　Mn3+　proportion　and　electrochemically　active　surface　area.　MnOx-PMOD48　showed　better　ORR/OER　performance　than　the　crystalline　MnOx　and　MnOx/Ti4O7　catalysts　from　our　previous　work.　Following　our　previous　work　on　crystalline　manganese　oxide　catalysts,　we　added　Ti4O7　during　the　PMOD　process　with　48　h　of　treatment　and　obtained　the　amorphous　catalyst　MnOx/Ti4O7-PMOD.　MnOx/Ti4O7-PMOD　was　supported　by　Ti4O7　particles,　which　led　to　improved　stability.　The　ORR/OER　catalytic　activity　of　MnOx/Ti4O7-PMOD　was　better　than　that　of　crystalline　catalyst　MnOx/Ti4O7-300,　which　was　the　best　crystalline　catalyst　in　our　previous　work.　We　also　compared　lithium-oxygen　batteries　assembled　with　MnOx/Ti4O7-PMOD　and　MnOx/Ti4O7-300.　The　battery　performance　tests　confirmed　that　the　amorphous　manganese　catalyst　had　better　ORR/OER　bifunctional　catalytic　performance　than　the　crystalline　manganese　catalyst　because　of　its　high　defect　state　with　more　abundant　edge　active　sites　and　more　surface-exposed　catalytic　active　sites.