| 摘要 |
<p>A carrier-supported catalyst for use in the decontamination of motor exhaust gas is produced. The catalyst comprises a honey comb structure of high melting material selected from the group consisting of alumina, cordierite, mullite and mixtures thereof provided with an intermediary layer of alumina as its carrier, and a nickel oxide layer and platinum deposited on said nickel oxide layer as its active ingredients. Typical of catalyst production are the following steps:1) alumina, nickel oxide and platinum, respectively, are deposited on the honey comb structure by first heating it to 300 to 400.degree.C and then dipping it, while hot, into the aqueous solution of the respective salts;2) thoroughly shaking the honey comb structure so provided with layers of alumina and nickel oxide and impregnated with the aqueous solution of the platinum salt so as to expel the excess of said solution retained in the channels of said structure,3) blowing a stream of hot air through the honey comb structure provided with layers of alumina and nickel oxide and impregnated with the platinum salt so as to shorten the drying interval and to diminish the migration of platinum salt from the interior to the periphery of said structure.</p> |
