DIESEL PARTICULATE FILTER AND EXHAUST GAS PURIFICATION DEVICE

摘要

Provided is a novel diesel particulate filter (DPF) having a structure in which a silver catalyst layer containing silver as a catalyst active component is formed on the surface of a filter base material with which a circulating exhaust gas comes into contact, whereby the diffusivity of the silver can be suppressed, and stable particulate matter (PM) combustion capacity can be achieved, in particular, at a high temperature. The DPF is equipped with a structure in which a silver catalyst layer, which includes a silver alloy containing silver and palladium as the catalyst active component, is formed on a partial or entire surface of each dividing wall which is located at an inflow side of the exhaust gas.