In　order　to　promote　the　commercial　application　of　proton　exchange　membrane　fuel　cells,　it　is　of　great　importance　to　develop　Pt-based　electrocatalysts　with　high　activity　and　stability　for　the　oxygen　reduction　reaction　(ORR).　Here,　urchin-like　mesoporous　TiO2　hollow　spheres　(UMTHS)　with　a　high　specific　surface　area　(167.1　m2　g-1)　and　improved　conductivity　were　designed　and　applied　as　supports　to　disperse　Pt　nanoparticles　(NPs)　for　the　first　time.　Uniform　Pt　NPs　(∼3.2　nm)　on　the　surface　of　nanothorns　were　obtained　after　heat　treatment.　The　as-prepared　product　(Pt/UMTHS)　exhibited　a　more　positive　half-wave　potential　(Eh)　than　that　of　the　reference　sample　Pt@C　without　UMTHS　(0.867　V　vs.　0.829　V).　The　improved　performance　can　be　ascribed　to　the　high　specific　surface　area　of　UMTHS.　The　Pt/UMTHS　also　exhibited　a　much　better　ORR　stability　than　the　commercial　Pt/C　after　long-term　cycling　at　0.6-1.0　V　according　to　the　comparison　of　Eh,　mass　activity　and　electrochemical　surface　area　with　Pt/C.　The　enhanced　stability　of　Pt/UMTHS　was　mainly　derived　from　the　strong　metal　support　interaction　between　Pt　NPs　and　UMTHS,　together　with　the　spatial　restriction　and　the　anti-restriction　provided　by　UMTHS.　©　2020　The　Royal　Society　of　Chemistry.