| 摘要 |
PROBLEM TO BE SOLVED: To produce a catalyst for exhaust gas purification using a hydrocarbon reforming material which is capable of removing NOx at high efficiency while scarcely generating N2O even under exhaust gas emission condition at a low HC/NOx ratio and can provide a catalyst hardly deteriorating in a high temperature condition. SOLUTION: This catalyst for exhaust gas purification contains phosphates such as magnesium phosphate, silver phosphate, nickel phosphate, copper phosphate, iron phosphate, zinc phosphate, tin phosphate, cobalt phosphate, and the like as hydrocarbon reforming materials capable of partially oxidizing hydrocarbon molecules. The catalyst for exhaust gas purification comprises catalyst layers deposited on a honeycomb type monolithic support and is produced by successively depositing a first catalyst layer (an inner layer) containing the above hydrocarbon reforming materials on the honeycomb support and a second catalyst layer (a surface layer) containing a rhodium component. |
