Water vapor tolerance of the Pd/HZSM-5 in the NO-methane-O_2 reation: its relation with very strong solid acidity of zeolite support

摘要

Pd/HZSM-5 with very strong acid site due to the extra-framework Al has the high water vapor tolerance in the NO-methane-O_2 reaction, The very strong solid acid sites is required to prevent the active species of highly dispersed Pd-O from agglomeration into the large particle.