We demonstrate that supermolecular templating allows tuning the pore size of ordered mesoporous materials in the once elusive range from 30 nm to more than 60 nm through simple control of synthetic variables (salt/supermolecule concentration and hydrothermal temperature). Gold nanoparticles (AuNPs) within the extra-large pores exhibit dramatically increased lifetime compared to those located within relatively small mesopores due to the enhanced mass diffusion that suppresses coke deposition on AuNPs.

中文翻译：

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具有周期性 30-60 nm 孔的有序纳米多孔二氧化硅可作为金纳米颗粒催化剂的有效支撑，具有更长的使用寿命

我们证明超分子模板允许通过简单控制合成变量（盐/超分子浓度和热液温度）在一度难以捉摸的范围内调整有序介孔材料的孔径，范围从 30 nm 到超过 60 nm。由于增强的质量扩散抑制了 AuNP 上的焦炭沉积，因此与位于相对较小的介孔内的金纳米颗粒相比，超大孔内的金纳米颗粒 (AuNP) 的寿命显着增加。