A NOx-trap composition comprises a platinum group metal (PGM), at least one NOx storage component and a first support for supporting the PGM and the at least one Nox storage component, which at least one NOx storage component comprises at least one of an alkali metal and a rare earth metal or a mixture of any two or more thereof, characterised in that the PGM consists of rhodium.
申请公布号
WO0240139(A1)
申请公布日期
2002.05.23
申请号
WO2001GB05060
申请日期
2001.11.19
申请人
JOHNSON MATTHEY PUBLIC LIMITED COMPANY;RAJARAM, RAJ, RAO;POULSTON, STEPHEN