Processing method of the exhaust gas in the liquid fuel direct supply type fuel cell

In the fuel cell the liquid fuel is supplied directly, the raw material organic matter contained in the exhaust gas, and aldehydes, ketones, carboxylic acids, carboxylic acid esters, the incomplete oxide such as carbon monoxide efficiently easily removed, discharged It provides a method for purifying gas. The present invention is an exhaust gas from the fuel cell the liquid fuel is supplied directly supporting platinum on a carbon carrier, using a catalyst having water repellency, to a method of treating in the presence of an oxidizing agent.