A Palladium-Nanoparticle and Silicon-Nanowire-Array Hybrid: A Platform for Catalytic Heterogeneous Reactions


  • We are grateful to Prof. Yousoo Kim (RIKEN) for useful discussion on silicon surface chemistry. We thank Dr. Tetsuo Honma, Dr. Masafumi Takagaki (JASRI, SPring-8), and Prof. Hikaru Takaya (Kyoto University) for measurement of XAFS (SPring-8, BL14B2, 2012B1868). We also thank RIKEN for elemental (Dr. Yoshio Sakaguchi), XPS (Dr. Aiko Nakao), TEM (Tomoka Kikitsu), ICP-AES (Chieko Kariya) and SEM/EDX (Aya Ohno) analyses, and preparation of SiNA (Yasuhiro Suzuki). We gratefully acknowledge financial support from JST ACT-C, JST CREST, JSPS (no 24550126, no 20655035 and no 2105), Takeda Science Foundation, the Naito Foundation, and RIKEN.


We report the development of a silicon nanowire array-stabilized palladium nanoparticle catalyst, SiNA-Pd. Its use in the palladium-catalyzed Mizoroki-Heck reaction, the hydrogenation of an alkene, the hydrogenolysis of nitrobenzene, the hydrosilylation of an α,β-unsaturated ketone, and the C-H bond functionalization reactions of thiophenes and indoles achieved a quantitative production with high reusability. The catalytic activity reached several hundred-mol ppb of palladium, reaching a TON of 2 000 000.