Abstract
The development of highly efficient and reusable supported metal catalysts is important for academic and industrial synthetic organic chemistry; however, their widespread application remains a challenge because supported Pd, Rh, and Pt catalysts are expensive. To overcome these problems, we have developed novel, highly stable, reusable, and selective heterogeneous catalysts consisting of silicon nanowire arrays (SiNAs) and metal nanoparticle composites. Metal nanoparticles on SiNA have been applied as heterogeneous catalysts in the Mizoroki–Heck reaction, C–H arylation, hydrosilylation, hydrogenation, reductive alkylation of amines, and hydrogenative decarboxylation of fatty acids. The catalysts used in this study showed high catalytic activity in batch and microflow conditions. Their structural investigation using X-ray Photoelectron Spectroscopy (XPS) suggests that strong metallic bonding (alloy/agglomeration) between the metal and silicon (metal silicide bond formation) is key to the high catalyst stability.
1 Introduction
2 Development of Silicon Nanowire Array (SiNA) Hybrid Catalysts and Silicon Nanostructure (SiNS) Hybrid Catalysts
3 Application of SiNA-Pd to Organic Synthesis
4 SINA-Supported Mono- and Bimetallic Nanoparticles for Hydrogenation Reactions
5 Application of SiNA-Pd to Microflow Reductive Alkylation Reactions
6 Application of SiNA-Rh to Hydrogenative Decarboxylation Reactions using Microwave Irradiation
7 Conclusions
Key words
heterogeneous catalyst - silicon nanowire array - hydrogenation - bio hydro-fined diesel - microflow reaction - metal nanoparticle