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Institute for Integrated Catalysis

Research Highlights

Presented at the 230th National Meeting of the American Chemical Society, August 28 through September 1, 2005 in Washington, D.C. (PNNL-SA-45047)

Inexpensive oxidation catalyst could reduce diesel emissions

silver hollandite, 200nm
PNNL scientists have found unique catalytic properties in silver hollandite.

It's not a new material, but a new application of silver hollandite could make a big impact in diesel emissions control. Researchers at Pacifi c Northwest National Laboratory have developed an inexpensive method of synthesizing nano-sized silver hollandite and have found the material has unique catalytic properties that can completely oxidize nitrogens of oxide, carbon monoxide and hydrocarbons. These chemical reactions caused by the silver hollandite are key to reducing pollutants in diesel engine emissions. PNNL researchers have also discovered that silver hollandite is an excellent low-temperature sulfur oxides absorbent. Unlike most oxidation catalysts, which can be easily poisoned by sulfur oxides, silver hollandite maintains its catalytic activity even while it ages by absorbing sulfur oxides.

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