New　surface　coordination　photocatalytic　systems　that　are　inspired　by　natural　photosynthesis　have　significant　potential　to　boost　fuel　denitrification.　Despite　this,　the　direct　synthesis　of　efficient　surface　coordination　photocatalysts　remains　a　major　challenge.　Herein,　it　is　verified　that　a　coordination　photocatalyst　can　be　constructed　by　coupling　Pd　and　CTAB-modified　ZnIn2S4　semiconductors.　The　optimized　Pd/ZnIn2S4　showed　a　superior　degradation　rate　of　81%　for　fuel　denitrification　within　240　min,　which　was　2.25　times　higher　than　that　of　ZnIn2S4.　From　the　in　situ　FTIR　and　XPS　spectra　of　1%　Pd/ZnIn2S4　before　and　after　pyridine　adsorption,　we　find　that　pyridine　can　be　selectively　adsorbed　and　form　Zn⋅⋅⋅C-N　or　In⋅⋅⋅C-N　on　the　surface　of　Pd/ZnIn2S4.　Meanwhile,　the　superior　electrical　conductivity　of　Pd　can　be　combined　with　ZnIn2S4　to　promote　photocatalytic　denitrification.　This　work　also　explains　the　surface/interface　coordination　effect　of　metal/nanosheets　at　the　molecular　level,　playing　an　important　role　in　photocatalytic　fuel　denitrification.　©　2022　by　the　authors.