A method of providing an exhaust treatment device is disclosed. The method includes applying a catalyst including gold and a platinum group metal to a particulate filter. The concentration of the gold and the platinum group metal is sufficient to enable oxidation of carbon monoxide and nitric oxide.
This invention was made with Government support under the terms of the Oxidation CRADA, Contract No. PNNL230 awarded by the Department of Energy. The Government may have certain rights in this invention.