The interfacial interaction of gold nanoparticles deposited on either model SiO2/Si(100) or high surface area amorphous or mesoporous silica with minute amounts of promoter oxide like “active” FeOx, TiO2 and CeO2 has been discussed. The role of the active oxide, its contribution to the perimeter along the gold nanoparticles has been interpreted. The oxide may invoke electronic interaction and simultaneously the defect structure of oxides likely has a key issue in the formation and stabilization of very small Au particles. The activity of the Au/oxide perimeter depends not only on the size of the Au particles, but also on the size and morphology of the oxide component (likely amorphous structure) regardless of whether it is supporting Au nanoparticles or decorating them. The activity in CO oxidation over Au catalysts is strongly affected by the length of the Au/“active” oxide perimeter which is regarded as the “active interface”. The longer length of the perimeter is evidenced by the enhanced CO oxidation activity.

中文翻译：

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促进氧化物形态的作用决定了 Au/SiO2 催化剂在 CO 氧化中的活性

已经讨论了沉积在模型 SiO2/Si(100) 或高表面积无定形或介孔二氧化硅上的金纳米颗粒与微量助催化剂氧化物（如“活性”FeOx、TiO2 和 CeO2）的界面相互作用。活性氧化物的作用，它对沿金纳米粒子的周长的贡献已经得到解释。氧化物可能会引起电子相互作用，同时氧化物的缺陷结构可能在非常小的 Au 颗粒的形成和稳定方面具有关键问题。Au/氧化物周长的活性不仅取决于 Au 颗粒的大小，还取决于氧化物组分（可能是无定形结构）的大小和形态，无论它是支撑 Au 纳米颗粒还是装饰它们。Au催化剂上的CO氧化活性受Au/“活性”氧化物周界长度的强烈影响，该长度被视为“活性界面”。增强的 CO 氧化活性证明了周长的长度更长。