General Motors Corp. recently was selected by the U.S. Dept. of Energy (DOE) to lead a research program to develop new catalytic materials to enhance the reduction of oxides of nitrogen (NOx) in diesel-engine exhaust. The automotive industry and DOE are highly interested in advancing the use of diesel engines for U.S. light vehicles, but next-generation federal emissions standards set to take effect in 2007 call for extreme reduction of NOx emissions, of which lean-burning engines such as ...

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