Synthesis
of Novel Two-Phase Co@SiO<sub>2</sub> Nanorattles
with High Catalytic Activity
- Publication date
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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@SiO<sub>2</sub> 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 <i>p</i>-nitrophenol. The
reduction rate nearly follows pseudo-first-order kinetics, and the
reaction rate constant is as high as 0.815 min<sup>โ1</sup> and is maintained at 0.565 min<sup>โ1</sup> 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