Bimetallic materials are of great interest in scientific research and applications due to their unique chemical and physical properties. Here, we report a solid strategy to prepare AuNi bimetallic nanoparticles in large spherical cages of ordered mesoporous silica with uniform size distribution (Au_xNi/mSiO₂). The surface chemical composition and catalytic performance of BMNPs (Bimetallic Nanoparticles) are precisely varied via confined inter-particle hetero-atom migration. The Au_xNi/mSiO₂ catalyst displayed greatly improved catalytic performance and excellent stability in gas-phase oxidation of benzyl alcohol. Moreover, the strategy has been successfully extended to the synthesis of Pt_yNi/mSiO₂, which performed higher activity and selectivity compared to the monometallic Pt catalyst in CO oxidation.

双金属材料由于其独特的化学和物理特性而在科学研究和应用中引起了极大的兴趣。在这里，我们报告了一种固体策略，该方法是在有序介孔二氧化硅的大球形笼中制备尺寸均匀（Au _x Ni / mSiO ₂）的AuNi双金属纳米颗粒。BMNP（双金属纳米粒子）的表面化学组成和催化性能通过受限的粒子间杂原子迁移而精确地变化。Au _x Ni / mSiO ₂催化剂在苯甲醇的气相氧化中显示出大大改善的催化性能和优异的稳定性。此外，该策略已成功扩展到Pt _y Ni / mSiO ₂的合成与单金属Pt催化剂在CO氧化中相比，具有更高的活性和选择性。