title: Synthesis of novel two-phase Co@SiO₂ nanorattles with high catalytic activity.
abstract: Noble metal nanocatalysts with remarkable catalytic properties have attracted much attention; however, the high cost of these materials limits their industrial applications. Here, we design and prepare Co@SiO2 nanorattles as a mixture of hcp-Co and fcc-Co phases as a substitute. The nanorattles exhibit both superior catalytic activity and high stability for the reduction of p-nitrophenol. The reduction rate nearly follows pseudo-first-order kinetics, and the reaction rate constant is as high as 0.815 min(-1) and is maintained at 0.565 min(-1) even after storing for one month, which is higher than that reported for noble metal nanocatalysts. Such an excellent property can be attributed to the novel two-phase composition and rattle-type structure.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230026, People's Republic of China.
authors.forename: Nan
authors.initials: N
authors.lastname: Yan
authors.forename: Ziang
authors.initials: Z
authors.lastname: Zhao
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Fang
authors.initials: F
authors.lastname: Wang
authors.forename: Hao
authors.initials: H
authors.lastname: Zhong
authors.forename: Qianwang
authors.initials: Q
authors.lastname: Chen