CeO2-supported　Ru　catalysts　have　high　hope　for　ammonia　synthesis;　however,　their　industrial　application　in　ammonia　synthesis　is　finite　by　the　presence　of　the　strong　metal-support　interaction　(SMSI)　or　Ru　encapsulation.　Herein,　a　sacrificial　sucrose　strategy　was　adopted　to　prepare　a　CeO2-supported　Ru　catalyst　without　invoking　SMSI　or　Ru　encapsulation.　Owing　to　the　improvement　of　the　proportion　of　Ru-0,　Ce3+　concentration,　number　of　the　exposed　ruthenium　species,　and　Ru-O-Ce　bonds,　the　catalyst　obtained　by　sacrificial　sucrose　strategy　can　adsorb　lots　of　hydrogen　species,　and　a　higher　proportion　of　H　species　desorb　by　way　of　forming　H-2,　leading　to　the　increase　of　ammonia　synthesis　activity　is　by　43%　in　comparison　with　the　catalyst　without　sucrose　sacrifice.