National Engineering Laboratory for Mobile Source Emission Control Technology;
China Automotive Technology&Research Center Co.;
Ltd.;
Tianjin 300300;
China;
School of Materials Science and Engineering;
Tianjin University;
Tianjin 300350;
China;
School of Materials Science and Engineering;
Lanzhou Jiaotong University;
Lanzhou 730070;
China;
La_(2)Ce_(2)O_(7)catalyst; Selective catalytic oxidation; CuO_(x)species; Ammonia slip;