Catalytic Treatment of Vehicle Exhaust

As a result of a major research effort lasting many years, catalyst systems employing metals of the platinum group have been successfully developed to solve most of the problems of vehicle exhaust treatment they 

One remaining difficulty, however, is that during the first few seconds of engine running the temperature of the catalyst has not reached the point where it can work effectively. The discovery of the superlative ability of gold catalysts to oxidise carbon monoxide at low temperatures has therefore led to a number of studies of their effectiveness in the component reactions 

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