... Er (erbium), Tm (thulium), Yb (ytterbium), and Lu (lutetium)2.Our Rare Earth Metals Catalyst(Al2O3,La,Ce,Y,Zr complex catalyst ... ,CH,include the industrial waste gas and motor vehicle exhaust. Such kind rare earth metals catalyst can reduce the application amount ... , favorable thermal stability, long service life as noble metal catalyst; and the rare-earth can improve the activity of catalyst, storage ...