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CuO和MnO_2的混合氧化物是良好的氧化-还原反应催化剂,尤其是作为Hopcalite催化剂(CuO40％,MnO_260％),即使在-20℃,对CO氧化仍表现出较好的活性.CeO_2作为氧化还原催化剂的助剂也被广泛应用,在贵金属为主的汽车排气净化三效催化剂中加入CeO_2,可提高CO,NO,HC的转化率和贵金属的分散度.本文用TPR方法研究了铜锰两组元氧化物在加铈前后的氧性质,用XRD,ESR,XPS方法研究其固相性质,用H_2-O_2滴定研究样品的供氧能力,讨论了CeO_2对Cu-Mn-O/γ-Al_2O_3系统的影响.
The mixed oxide of CuO and MnO 2 is a good oxidation-reduction catalyst, especially as Hopcalite catalyst (CuO40%, MnO_260%), which shows good activity for CO oxidation even at -20 ℃ .CeO 2, as redox Catalyst additives are also widely used in the exhaust gas purification of precious metal-based catalyst to add CeO_2, can improve the CO, NO, HC conversion rate and the dispersion of precious metals.In this paper, TPR method of copper and manganese two The oxygenation properties of the elemental oxides before and after the addition of cerium were investigated by XRD, ESR and XPS. The oxygenation ability of the sample was investigated by H 2 O 2 titration. The effects of CeO 2 on the properties of Cu-Mn-O / γ-Al 2 O 3 System impact.