Simultaneously　enhancing　selectivity　and　stability　on　supported　propane　dehydrogenation　(PDH)　catalysts　remains　a　formidable　challenge.　Here,　we　report　a　combined　static　and　dynamic　strategy　to　address　these　issues　synergistically.　Firstly,　we　demonstrate　a　feasible　sol-gel　method　for　preparing　atomically-dispersed　Bi-decorated　metal　nanoparticle　catalysts　(MBi/Al2O3,　M=Fe,　Co,　Ni,　and　Zn).　In　PDH　testing,　the　total　selectivity　of　by-products　(CH4　and　C2H6)　significantly　decreases　to　4　%　for　CoBi　catalysts　due　to　the　static　Bi-doping,　compared　with　16　%　for　Co-supported　catalysts.　Secondly,　to　enhance　catalytic　stability,　we　introduce　a　dynamic　trace　CO2　co-feeding　route.　10CoBi/Al2O3　catalysts　exhibit　superior　durability　against　coke　formation　for　330　hours　in　PDH　under　a　40　%　C3H8　atmosphere　followed　by　pure　C3H8　conditions　at　600　degrees　C　while　maintaining　propylene　selectivity　at　96　%.　Notably,　introducing　trace　CO2　leads　to　a　remarkable　6-fold　decrease　in　the　deactivation　rate　constant　(k(d)).　Multiple　characterizations　and　density　functional　theory　calculations　reveal　that　charge　transfer　from　atomically-distributed　Bi　to　Co　nanoparticles　benefits　lowering　the　energy　of　C3H6　adsorption　thereby　suppressing　by-products.　Furthermore,　the　dynamic　co-feeding　of　trace　CO2　facilitates　coke　removal,　suppressing　catalyst　deactivation.　The　static　Bi-doping　and　dynamic　trace　CO2　co-feeding　strategy　contributes　simultaneously　to　increased　selectivity　and　stability　on　supported　PDH　catalysts.