The invention is a selective reduction catalyst useful for converting exhaust gases generated by a lean-burn engine where the atmosphere is oxidizing. The catalyst comprises zeolite containing two forms or rhodium, small metal particles and ion-exchanged into the zeolite, the latter being in significant...http://www.google.es/patents/US5968463?utm_source=gb-gplus-sharePatente US5968463 - NO.sub.x selective reduction catalyst with broadened active temperature range
NO.sub.x selective reduction catalyst with broadened active temperature range
