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| | ScienceWeek |
 | | The ceria, particularly in combination with zirconia, works as an oxygen storage component, enabling the oxidation of hydrocarbons and carbon monoxide to occur during moments when the engine exhaust is fuel-rich. |
 | | The lanthana serves to stabilize the alumina against a loss of surface area, and the baria acts as a trap for sulfur trioxide: a catalyst deactivator, or "poison." 4) The importance of small particles to the performance of catalysts has stimulated extensive efforts to develop tools for their characterization (2,3). |
 | | Originating from the fields of physics, chemistry, materials science, and chemical engineering, this area of study is now often referred to as "nanoscience". |
| www.scienceweek.com /2003/sw030613.htm (6195 words) |
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