Thedesign　of　photocatalysts　plays　a　central　role　in　determiningthe　photocatalytic　H-2　yield.　Here,　we　used　a　design　strategythat　is　different　from　conventional　methods　to　prepare　our　photocatalyticsystems.　Large　porous　carbon　aerogels　(CA)　with　rich　surface　areaswere　used　to　receive　photogenerated　electrons.　TiO2　quantumdots　were　used　as　photocatalysts　and　anchored　on　large　porous　CAsto　form　CA@TiO2　systems.　The　H-2　yield　of　theoptimized　CA@TiO2　composite　is　&　SIM;2.1　mmol/g,　&　SIM;11times　higher　than　that　of　pure　TiO2　quantum　dots.　High-resolutionX-ray　photoelectron　spectroscopy　and　high-angle　annular　dark-fieldscanning　transmission　electron　microscopy　demonstrate　that　the　photogeneratedelectrons　can　be　easily　transferred　from　TiO2　quantum　dotsto　porous　CAs.　Thus,　efficient　charge　separation　can　be　realized　forthe　succeeding　highly　efficient　H-2　evolution.　Our　resultshere　provide　a　different　way　from　conventional　methods　to　design　photocatalyticsystems　with　high　H-2　yield.