Burned gas purifying catalyst
 An exhaust gas emission control catalyst includes an under catalyst layer containing at least one of barium and lanthanum and an over catalyst layer containing an agent for absorbing water in a gas, at least one of the under catalyst layer and over catalyst layer containing catalytic metal. 
Mazda Motor Corporation
B B F B F Y B F B F B Y F
B01J B01J F01N B01D F01N Y02T B01D F01N B01J F01N B01D Y02A F01N
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Takahiro Hideharu Hiroshi Kenichi Akihide Kenji Hiroshi Makoto Hirosuke
Kurokawa Iwakuni Murakami Yamamoto Takami Okamoto Yamada Kyogoku Sumida