A combination of the Pt-BaO/CeO₂ and Cu/CeO₂ (PBC + CC) catalyst offers high NO_x storage and reduction (NSR) performance at low temperatures; however, the PBC + CC catalyst is prone to deactivation upon hydrothermal aging. In this study, we used a reduced γ-Al₂O₃ support with unsaturated penta-coordinated Al³⁺ (Al³⁺_penta) sites, which can anchor catalytic materials (Pt, Cu, BaO, and CeO₂). The physical mixture of Pt-BaO-CeO₂ and Cu-CeO₂ deposited on the reduced Al₂O₃ (PBCrA + CCrA) was prepared and tested for the NO_x removal. The PBCrA + CCrA catalyst showed little degradation after hydrothermal aging at 750 °C. XRD, HR-TEM, CO chemisorption, N₂O chemisorption, and N₂ physisorption results showed that catalytically active phases were barely changed even after the hydrothermal aging, particularly preventing ceria sintering. CO-TPR and XPS results demonstrated that the PBCrA + CCrA catalyst has a superior reducibility of lattice oxygen on CeO₂, leading to excellent low-temperature activity.

对Pt的BaO /铈的组合₂和Cu /的CeO ₂（PBC + CC）催化剂提供高的NO _X储存还原在低温（NSR）性能; 然而，PBC + CC催化剂在水热老化后容易失活。在这项研究中，我们使用具有降低的γ-Al ₂ ö ₃与不饱和五配位的Al支持³⁺（铝³⁺_五）位点，其可以锚定催化材料（铂，铜，BaO和的CeO ₂）。制备沉积在还原Al ₂ O ₃（PBCrA + CCrA）上的Pt-BaO-CeO ₂和Cu-CeO ₂的物理混合物，并测试其NO_x移除。在750°C水热老化后，PBCrA + CCrA催化剂几乎没有降解。XRD，HR-TEM，CO化学吸附，N ₂ O化学吸附和N ₂物理吸附结果表明，即使在水热老化后，催化活性相也几乎没有变化，特别是防止二氧化铈烧结。CO-TPR和XPS结果表明，PBCrA + CCrA催化剂在CeO ₂上具有优异的晶格氧还原性，从而具有出色的低温活性。