This work reports the in situ synthesis of ZSM-5 zeolite films on cordierit
e and the performance of a Cu/ZSM-5-coated monolithic catalyst in the lean
NOx reduction reaction. At the end of the hydrothermal crystallization, a z
eolite/cordierite composite was obtained which consists of a continuous zeo
lite film that strongly attaches to the sustrate surface, The monolithic ca
talysts so prepared are active for the reduction of NO. (C) 2001 Elsevier S
cience B.V. All rights reserved.