H2-induced structural evolution in non-crystalline rhodium nanoparticles

Abstract
A THF solution of [Rh(μ-Cl)(C2H4)2]2 reacts in the presence of poly(vinylpyrrolidone) (PVP) with the 15-electron complex vanadocene, [V(C5H5)2], to give PVP-protected native rhodium particles. High resolution electron microscopy (HREM) and wide angle X-ray scattering (WAXS) experiments confirm the presence of a non-periodic structure (polytetrahedral atomic organization); when exposed to hydrogen, the rhodium particles exhibit a pattern consistent with the signature of a fcc lattice.

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