期刊文献+

Heterogeneously supported pseudo-single atom Pt as sustainable hydrosilylation catalyst 被引量:7

Heterogeneously supported pseudo-single atom Pt as sustainable hydrosilylation catalyst
原文传递
导出
摘要 The identification of highly active heterogeneous catalysts to replace their homogeneous counterparts remains a challenge in the case of organic catalysts, especially polymers, in highly viscous reaction systems. In this work, we designed and synthesized a novel, solid-supported, and heterogeneous pseudo-single atom Pt catalyst with high activity and recyclability. Superparamagnetic Fe3O4-SiO2 core--shell nanoparticles (NPs) were used as the substrate. The functionalization of the SiO2 shell with silane coupling agents containing vinyl groups allows stabilizing Pt on the SiO2 surface through complexation. The as-prepared pseudosingle atom Pt displays high activity in the hydrosilylation of allyl-terminated polyether with polymethylhydrosiloxane and could be easily collected by applying a magnetic field. The Pt/vinyl/SiO2/Fe3O4 catalyst can be reused for up to four reaction cycles without appreciable decrease in activity. This work demonstrates a novel strategy for the design of pseudo-single atom noble metal catalysts for processes in high-viscosity media. The identification of highly active heterogeneous catalysts to replace their homogeneous counterparts remains a challenge in the case of organic catalysts, especially polymers, in highly viscous reaction systems. In this work, we designed and synthesized a novel, solid-supported, and heterogeneous pseudo-single atom Pt catalyst with high activity and recyclability. Superparamagnetic Fe3O4-SiO2 core--shell nanoparticles (NPs) were used as the substrate. The functionalization of the SiO2 shell with silane coupling agents containing vinyl groups allows stabilizing Pt on the SiO2 surface through complexation. The as-prepared pseudosingle atom Pt displays high activity in the hydrosilylation of allyl-terminated polyether with polymethylhydrosiloxane and could be easily collected by applying a magnetic field. The Pt/vinyl/SiO2/Fe3O4 catalyst can be reused for up to four reaction cycles without appreciable decrease in activity. This work demonstrates a novel strategy for the design of pseudo-single atom noble metal catalysts for processes in high-viscosity media.
出处 《Nano Research》 SCIE EI CAS CSCD 2018年第5期2544-2552,共9页 纳米研究(英文版)
基金 This work is partially supported by the National Natural Science Foundation of China (No. 21303265) and Ph.D. Programs Foundation of Ministry of Education of China (No. 20130007120012).
关键词 HYDROSILYLATION SUPERPARAMAGNETIC core-shell catalyst single-atom catalyst recyclable catalyst hydrosilylation,superparamagnetic,core-shell catalyst,single-atom catalyst,recyclable catalyst
  • 相关文献

参考文献4

二级参考文献99

共引文献66

同被引文献37

引证文献7

二级引证文献82

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部