Ammonia　decomposition　for　onsite　hydrogen　production　has　been　regarded　as　an　important　reaction　which　links　to　efficient　hydrogen　storage,　transport　and　utilization.　However,　it　still　remains　challenging　to　develop　efficient　catalysts　with　robust　stability　for　ammonia　decomposition.　Herein,　an　integrated　strategy　was　employed　to　synthesize　Ru/SiO2@N-CS　via　wrapping　a　thin　layer　of　N-doped　carbon　onto　the　SiO2　sphere,　following　the　anchor　of　Ru　nanoparticles　(NPs)　onto　the　support.　The　obtained　Ru/SiO2@N-CS　(Ru　loading:　1　wt%)　shows　a　promising　performance　for　ammonia　decomposition,　reaching　94.5　%　at　550　°C　with　a　gas　hourly　space　velocity　(GHSV)　of　30　000　mL　gcat-1h−1.　The　combination　of　the　SiO2　as　the　core　prevents　the　degradation　of　N-doped　carbon　layers　and　then　enhance　the　durability　of　the　catalysts,　remaining　stable　after　50　h　at　evaluated　temperatures.　Adequate　characterizations　were　used　to　illustrate　the　effect　of　microchemical　environment　on　ammonia　decomposition　activity　of　Ru/SiO2@N-CS　catalyst　under　different　calcination　atmosphere　and　the　correlation　between　structure　and　performance.　©　2024　Elsevier　B.V.