Nanometer perovskite-type catalysts La_(1-x)Sr_xMnO_3 are preparation by malic acid sol-gel method that add surface-active agent.

• 采用添加表面活性剂的苹果酸溶胶-凝胶法制备了纳米钙钛石型氧化物催化剂 La_(1-x)Sr_xMnO_3。