Background:　In　CeO　2　_　MnO　2-based　electrocatalysts　for　oxygen　evolution,　addressing　issues　of　stability　and　electron　transfer　delay　is　crucial　for　practical　applications.　The　modification　of　electronic　structures　through　single　metal　oxides　(W,　Ni,　and　Mn)　can　potentially　enhance　electron　mobility　and　improve　metal-support　interactions,　thus　boosting　electrocatalytic　activity.　Method:　To　this　end,　CeO2_MnO2　nanorods　intercalated　with　single　metal　atom　oxides　(SMAO)　and　supported　by　a　reduced　graphene　oxide　(rGO)　layer　(designated　WNiMnCeMn-R-3)　were　synthesized　using　a　sonication　process.　Significant　findings:　This　catalyst　composition,　particularly　the　WNiMnCeMn-R-3　variant　with　a　CeO2　to　MnO2　ratio　of　15:45　%,　exhibited　significantly　lower　overpotential　(280　mV)　and　Tafel　slope　(65.18　mV　dec_　1　)　at　a　current　density　of　10　mA　cm　_　2　compared　to　other　nanocomposites　like　CeO　2　_　MnO　2　,　CeO　2　_　MnO　2-rGO,　WNiMnCeMn-R-1　(CeO2:MnO2　as　45:15　%)　and　WNiMnCeMn-R-2　(CeO2:MnO2　as　30:30　%).　Exceptional　electrochemical　stability　was　demonstrated　during　a　24　h　chronopotentiometry　test　over　2000　cyclic　voltammetry　cycles.　The　outstanding　catalytic　performance　and　stability　of　WNiMnCeMn-R-3　can　be　attributed　to　the　synergistic　effects　of　SMAO,　CeO2,　MnO2,　and　rGO　layers,　which　collectively　enhance　the　intrinsic　catalytic　activity　and　facilitate　faster　electron　transport.　This　study　aims　to　advance　the　development　of　electrochemical　catalysts　utilizing　metal　oxides,　specifically　SMAOs　anchored　onto　rGO.