A facile approach was developed for synthesizing Au-SH@SO_(3)H-SBA-15 with ordered mesoporous channels by reducing Au^(3+)to Au nanoparticles with SH-group bonded to silica support,followed by in situ coordinating Au ...A facile approach was developed for synthesizing Au-SH@SO_(3)H-SBA-15 with ordered mesoporous channels by reducing Au^(3+)to Au nanoparticles with SH-group bonded to silica support,followed by in situ coordinating Au with the unreacted SH-groups.This catalyst exhibited high efficiency in alkyne hydration owing to the high activity of uniformly dispersed ultrasmall Au nanoparticles,the diminished diffusion limit due to the mesoporous structure,and the promoting effect of acidic SO_(3)H-groups resulting from oxidation of the SH-group by Au^(3+).Meanwhile,the catalyst could be easily recycled and displayed strong durability owing to the strong hydrothermal stability of mesoporous structure and the enhanced stability against Au leaching due to the Au-SH coordination bond.展开更多
基金the National Natural Science Foundation of China(21237003,21261140333)the Project from College Natural Science Research Plan of Jiangsu Province(13KJB150008)and Project of Huaian City(HAG2013077).
文摘A facile approach was developed for synthesizing Au-SH@SO_(3)H-SBA-15 with ordered mesoporous channels by reducing Au^(3+)to Au nanoparticles with SH-group bonded to silica support,followed by in situ coordinating Au with the unreacted SH-groups.This catalyst exhibited high efficiency in alkyne hydration owing to the high activity of uniformly dispersed ultrasmall Au nanoparticles,the diminished diffusion limit due to the mesoporous structure,and the promoting effect of acidic SO_(3)H-groups resulting from oxidation of the SH-group by Au^(3+).Meanwhile,the catalyst could be easily recycled and displayed strong durability owing to the strong hydrothermal stability of mesoporous structure and the enhanced stability against Au leaching due to the Au-SH coordination bond.
