Pt-based　catalysts　play　a　crucial　role　in　the　catalytic　combustion　of　benzene.　Previous　studies　have　highlighted　the　significance　of　metal　Pt　atoms　as　the　active　phase　in　benzene　combustion,　while　oxidized　Pt　sites　exhibit　lower　activity.　In　practical　catalysts　synthesized　through　wet　chemical　methods,　a　range　of　metal　species　is　present,　including　highly　dispersed　oxidized　metal　atoms,　small　oxidized　metal　clusters,　and　metal　nanoparticles.　This　paper　explores　an　effective　strategy　to　enhance　metal　utilization　and　develop　high-performance　platinum-based　catalysts　for　benzene　catalytic　combustion　by　introducing　alkali　metals.　This　approach　transforms　low-activity　oxidized　metal　atoms　and　small　oxidized　metal　clusters　into　active　small　metal　nanoparticles.　The　introduction　of　K-O　groups　displaces　Pt　from　oxygen　vacancy　trapping　sites　on　antimony-doped　tin　oxide　(ATO)　support,　enhancing　Pt　mobility　and　converting　them　into　active　metallic　Pt　nanoparticles,　ultimately　improving　benzene　combustion.　These　findings　highlight　the　role　of　alkali　metals　in　promoting　catalytic　activity　and　provide　insights　for　designing　high-performance　noble-metal-based　catalysts.　©　2023　Elsevier　B.V.