Catalytic　performance　of　Pt-promoted　zeolite　catalysts　in　alkane　isomerization　highly　depends　on　the　synergistic　effect　between　metal　and　acid　sites.　Traditional　impregnation　synthesis　leads　to　large　and　nonuniform　Pt　clusters　on　external　surface　of　zeolites.　An　approach　based　on　the　Surface　Organometallic　Chemistry　concept　was　employed　to　controllably　synthesize　Pt/Hβ　catalysts.　The　grafting　of　dimethyl　(1,5-cyclooctadiene)platinum　(II)　at　the　surface　of　dehydroxylated　Hβ　surface　and　hydrogenolysis　of　surface　organometallic　compound　result　in　small　Pt　clusters　(1.73　nm),　which　are　uniformly　dispersed　on　the　mesopores　of　Hβ　zeolite.　The　achieved　Pt/Hβ　catalyst　shows　high　activity　and　stability　in　n-butane　isomerization.　©　2020　Elsevier　Inc.