چکیده
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Enclosing functional nanoparticles in stable inorganic supports is
important for generating ultra-stable catalytic active sites with
good performance and material utilization efficiency. Here we
describe a simple method to synthesize ultra-thin Ag nanocrystals
with dimensions that are defined by the B1.4 nm 2D interlayer
separating a layered silicate nanostructure. We call the particles
‘‘nanoplates’’ because they are o1.4 nm thick in one direction and
their in-plane dimensions are defined by reaction time. The layered
silicate is pillared with dialkylurea, which serves both as a reducing
agent for the Ag precursor and immobilizes the Ag nanoplates in
the interstitial nanospace. The supported Ag nanoplates showed
catalytic activity for hydrolysis of NH3BH3 and generation of H2 at
room temperature. These supported Ag nanocatalysts had performance
much higher than spherical Ag nanoparticles. They, moreover, had
performance and stability comparable to costly supported Pt
nanoparticles
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