State Key Laboratory of Inorganic Synthesis and Preparative Chemistry;
College of Chemistry;
filin University;
Changchun 130012;
China;
State Key Laboratory of Supramolecular Structure and Materials;
College of Chemistry;
filin University;
Changchun 130012;
China;
Surface reconstruction; KBH4; Perovskite oxides; Oxygen vacancies; CO oxidation;