<p>A NOx-trap composition comprises: (a) at least one first NOx storage component comprising at least one alkali metal supported on at least one first support material; and (b) a platinum oxidation catalyst and at least one second NOx storage component not being an alkali metal supported on at least one second support material, whereby the platinum oxidation catalyst and the at least one alkali metal are physically segregated thereby susbtantially maintianing the hydrocarbon conversion activity of the platinum oxidation catalyst.</p>
申请公布号
WO0222241(A1)
申请公布日期
2002.03.21
申请号
WO2001GB04160
申请日期
2001.09.17
申请人
JOHNSON MATTHEY PUBLIC LIMITED COMPANY;RAJARAM, RAJ, RAO;POULSTON, STEPHEN