Researchers at the U.S. Department of Energy have unraveled the inner workings of barium oxide, a common catalyst used in emission control devices that reduces the output of oxides of nitrogen. Improved catalysts, which are essential to help diesels meet stringent new emissions standards in the U.S. and Europe, could enable broader applications of these and other lean-burning powerplants. Molecular-level chemical analysis was conducted at DOE's Pacific Northwest National Laboratory in ...

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