Platinum nanoparticles and nanowires have been synthesized inside zeolite mordenite using a solid-state
reduction method. Tetrammine platinum nitrate was introduced into the pores via incipient wetness
impregnation and it was reduced using powder sodium borohydride. With this method it was possible to
obtain single crystal nanowires along the edges of the zeolite particle. The molar ratio of the reducing agent
to platinum atoms was a critical parameter for the formation of either uniform nanoparticles or nanowires.
Using a regular aqueous sodium borohydride solution reduction it was not possible to obtain nanowires in
this zeolite. To the best of the author's knowledge this is the first time sodium borohydride in its solid form is
used as a reducing agent to form nanostructures and this is also the first time a solid-state method is used to
form nanostructures in a zeolite.