The　impasse　always　present　regarding　catalysts　for　energy　conversion　reactions　is　that　noble　metals　with　promising　activity　are　limited　by　their　high　price　and　scarcity,　whereas　base　metals　with　a　lower　price　show　moderate　activity　performance.　Herein,　a　purely　transition　metal-based,　Ni-promoted　3D　draped　porous　Co3O4　(Ni/3DDP-Co3O4)　catalyst　is　demonstrated　to　be　highly　effective　for　CO2　methanation,　achieving　100%　CO2　conversion　and　CH4　selectivity　at　250　degrees　C　and　a　space　velocity　of　48　000　mL　(g　h)(-1).　Dispersing　Ni　nanodeposits　on　the　large　surface　of　the　3DDP-Co3O4　promotes　a　2.6　times　increase　in　reaction　rate　and　a　20%　drop　in　apparent　activation　energy　relative　to　3DDP-Co3O4.　An　abundance　of　surface　oxygen　vacancies　extrinsically　forms　on　the　Ni/3DDP-Co3O4　by　both　Co-Ni　charge-compensating　mechanisms　and　hydrogen　treatment,　in　conjunction　with　the　low-temperature　reducibility,　high　surface　area,　and　strong　Co-Ni　interaction　effect,　enabling　the　enhanced　catalytic　performance　for　CO2　methanation.