Developing catalysts with high cost-efficiency, good oxidation activities and strong thermal resistance is an ongoing task. Herein, we present the design and synthesis of confined catalysts with Ag protected by alumina. Thermal treatment at 800 °C for 10 h caused neither silver loss nor deactivation of this catalyst. Instead, nano-particles of Ag formed because of the heat/O₂-derived ripening. These highly dispersed silver species and the catalyst’s mesoporous structure worked in tandem to achieve good catalytic performance for oxidation reactions, which made the aged sample a good candidate as CO elimination and gasoline particulate filter catalysts.

开发具有高成本效率，良好的氧化活性和强耐热性的催化剂是一项持续的任务。本文中，我们介绍了设计和合成带有氧化铝保护的银的密闭催化剂。在800°C下热处理10 h既不会损失银，也不会使该催化剂失活。相反，由于热/ O ₂衍生的成熟而形成了Ag的纳米颗粒。这些高度分散的银物质和催化剂的介孔结构协同工作，以实现对氧化反应的良好催化性能，这使老化的样品成为消除CO和汽油颗粒过滤器催化剂的良好选择。