Due　to　isolated　active　sites　of　single-atom　catalysts　(SACs),　the　catalytic　kinetics　of　SACs　are　often　unsatisfactory　in　those　catalytic　reaction　processes　involving　multiple　intermediates　and　reaction　pathways,　such　as　the　oxygen　reduction　reaction　(ORR).　To　address　this　bottleneck　and　enhance　the　ORR　performance　of　SACs,　we　developed　a　boron-doped　Fe-Cu　dual-atom　catalyst　(Fe-Cu-B/NC).　This　catalyst　is　designed　to　modulate　the　oxygen　adsorption　model　and　adjust　the　adsorption　strength　of　oxygen　intermediates　at　the　metal　sites.　In　situ　synchrotron　infrared　spectroscopy　demonstrated　that　the　Fe-Cu-B/NC　catalyst　facilitates　the　adsorption　of　oxygen　intermediates　on　the　Fe-Cu　dual　sites　through　a　bridge　adsorption　model,　which　is　more　favorable　for　O　&　horbar;O　bond　cleavage.　Meanwhile,　in　situ　electrochemical　impedance　spectroscopy　revealed　that　the　transformation　of　the　adsorption　model　can　accelerate　the　kinetics　of　intermediate　species,　further　enhancing　the　catalytic　efficiency.　As　a　result,　Fe-Cu-B/NC　exhibits　good　ORR　activity　and　strong　durability,　retaining　90%　of　its　initial　current　density　after　10　h　of　the　ORR　process　in　alkaline　media.