Bottlenecks　in　direct　methanol　fuel　cells　(DMFCs)　with　conventional　noble　metals　as　anode　catalysts　involve　the　formation　of　valueless　byproducts　and　carbon　dioxide　(CO2)　emissions.　Carbon-supported　Pt　single　atoms　have　demonstrated　high　performance　in　DMFCs.　However,　the　adsorbed　intermediates　(COads)　strongly　bind　to　Pt　single-atom　sites,　resulting　in　complete　methanol　oxidation　to　CO2　and　low　power　densities.　Herein,　we　have　developed　a　DMFC　for　CO2-emission-free　coproduction　of　electricity　and　valuable　formate　using　metal　organic　framework　(MOF)-derived　N-doped　porous　carbon-supported　PtRu　single-atom　(referred　to　as　PtRuSA/NPC)　catalysts.　The　DMFC　produces　current　and　power　densities　of　657　mA　cm(-2)　and　97.4　mW　cm(-2),　respectively,　at　a　potential　of　0.65　V　with　a　98.4%　Faraday　efficiency　for　formate　at　80　degrees　C.　Density　functional　theory　(DFT)　calculations　show　that　CH3OH　molecules　preferentially　adsorb　onto　the　PtRu　single　atoms,　but　their　oxidation　to　CO2　molecules　on　PtRuSA/NPC　is　kinetically　unfavorable　due　to　the　large　energy　barrier.　This　study　offers　a　pathway　to　developing　high-performance　and　CO2-emission-free　electrocatalysts　for　DMFCs.