06066587 is referenced by 67 patents and cites 26 patents.

A catalyst has a base catalyst layer containing platinum and barium as precious metal supported by alumina and an over catalyst layer containing platinum and rhodium as precious metal supported by zeolitr. The platinum and rhodium in the over catalyst layer activate NOx and HC so as to make them more reactive in terms of energy, and the barium in the base catalyst layer makes the platinum be more dispersive in the base catalyst layer. Under the existence of dispersive platinum, NOx in exhaust gas is decomposed and purified by reaction with reactive NO.sub.2 and partially oxidized HC generated in the over catalyst layer.

Title
Catalyst for purifying exhaust gas
Application Number
8/937175
Publication Number
6066587
Application Date
September 25, 1997
Publication Date
May 23, 2000
Inventor
Hiroshi Yamada
Hatsukaichi
JP
Kenji Okamoto
Hiroshima
JP
Makoto Kyogoku
Hiroshima
JP
Hideharu Iwakuni
Higashihiroshima
JP
Akihide Takami
Furuenishi-machi
JP
Takahiro Kurokawa
Hiroshima
JP
Agent
Sidley & Austin
Agent
Hugh A Abrams
Assignee
Mazda Motor Corporation
JP
IPC
B01J 23/58
View Original Source