| 摘要 |
PURPOSE:To improve the NOx cleaning function of a catalyst in an oxygen excessive atmosphere (thereafter lean atmosphere) in which a conventional catalyst shows no activity, provide an exhaust gas cleaning catalyst which maintains high catalytic function to NOx in an exhaust gas in a wide temperature range from low temperature to high temperature and to provide a producing method of the catalyst. CONSTITUTION:This exhaust gas cleaning catalyst is a catalyst consisting of a multicomponents-compounded oxide containing copper, nickel, and aluminum and has the formula; CuaNibAlOg, wherein (a), (b), and (d) stand for atomic ratios of respective elements and in the case d=2.0, a=-0.01-0.3 and b=0.2-0.8, and (g) stands for the number of oxygen atoms necessary to satisfy the atomic valence of all the elements. |
