研究了 CuO 与γ-Al2O3和 CeO2的相互作用,并由此制备出能有效脱除 CO, C3H6和 NO 的催化剂,考察了不同载体表面CuO 簇的分散稳定性和耐老化性能.结果发现,随 CuO 负载量的增加, CuO 簇因与 CeO2载体的强相互作用而稳定存在;而在γ-Al2O3表面, CuO 簇易聚集成较大的颗粒.另一方面,由于 CeO2本身较差的热稳定性,表面分散的 CuO 在950 oC 高温处理后烧结.因此,基于γ-Al2O3载体优越的耐老化性能,在γ-Al2O3载体分散 CeO2,然后再担载 CuO,从而得到了稳定的 CuO 簇,所得催化剂比 CuO/γ-A12O3和 CuO/CeO2具有更好的催化性能和抗热老化性能.
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