This　paper　introduces　a　novel　approach　of　encapsulating　Pt　nanoparticles　within　the　pores　of　a　molecular　sieve.　By　comparing　the　dispersion,　reducibility　and　surface　acid　sites,　the　effect　of　the　combination　of　molecular　sieves　and　Pt　particles　on　the　catalytic　performance　of　toluene　was　studied.　The　findings　demonstrate　that　Pt　nanoparticles　were　encapsulated　within　the　molecular　sieve　framework　of　ZSM-5　molecular　sieves　using　an　in-situ　synthesis　method,　exhibiting　remarkable　catalytic　activity　towards　toluene　oxidation　(T90=172　℃).　Mainly　due　to　the　spatial　confinement　of　the　ZSM-5　molecular　sieve　framework　reduces　the　size　of　Pt　nanoparticles,　enhances　their　dispersion　of　the　Pt@ZSM-5　catalysts.　In　addition,　the　space　separation　effect　of　ZSM-5　on　Pt　metal　enhances　their　interaction　and　promotes　the　valence　state　conversion　of　Pt　species.　It　leads　to　a　large　number　of　acid　sites　and　oxygen　vacancies　in　the　catalyst,　which　improves　the　adsorption　and　migration　of　toluene,　thereby　improving　the　catalytic　activity.　This　study　will　provide　valuable　insights　into　the　preparation　of　new　nanocatalysts　and　the　catalytic　treatment　of　toluene.　©　2024　Elsevier　B.V.