作者:Ken-ichi Shimizu、Katsuya Shimura、Naomichi Imaiida、Atsushi Satsuma
DOI:10.1016/j.molcata.2012.08.007
日期:2012.12
Selective catalytic hydration of silanes to silanols is studied by Ni metal nanoparticles (NPs) on activated carbon (Ni/C) prepared by in situ H-2-reduction of NiO-loaded activated carbon (NiO/C). The catalytic activity of Ni/C increases with decrease in the average Ni particle size. Ni/C with the smallest size (7.6 nm) exhibits a high selectivity for silanols, high turnover number (TON) of 9300, and excellent reusability. Studies on the structure-activity relationship show that metallic Ni species on the surface of small Ni metal particles are catalytically active species. Based on mechanistic studies, a catalytic cycle involving the activation of Et3SiH as the rate limiting step is proposed. (C) 2012 Elsevier B.V. All rights reserved.