Hydrothermal synthesis and characterization of transition metal (Mn/Fe/Cu) co-doped cerium oxide-based nano-additives for potential use in the reduction of exhaust emission from spark ignition engines

过渡金属（Mn/Fe/Cu）共掺杂氧化铈基纳米添加剂的水热合成与表征，可用于减少火花点火发动机的废气排放