Abstract
Nanocomposites based on PtPd nanoparticles with chemical ordering like disordered solid solution on surface of multilayer graphene have been prepared through thermal shock of mechanically obtained mixture of double complex salt [Pd(NH3)4][PtCl6] and different carbon materials–exfoliated graphite, graphite oxide and graphite fluoride. An effect of original carbon precursors on formation of PtPd bimetallic nanoparticles was studied using X-ray absorption spectroscopy (XAFS), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). It was shown that the distribution of bimetallic nanoparticles over the multilayer graphene surface as well as the particles size distribution is controlled by the graphene precursors. For all nanocomposites, the surface of the nanoparticles was found to be Pd-enriched. In case when the thermal exfoliated graphite and graphite oxide were used as the graphene precursors a thin graphitized layer covered the nanoparticles surface. Such a graphitized layer was not observed in the nanocomposite, which used the fluorinated graphite as the precursor.
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Translated from Zhurnal Strukturnoi Khimii, Vol. 57, No. 7, pp. 1475-1484, September-October, 2016.
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Asanova, T.I., Asanov, I.P., Tur, V.A. et al. PtPd-nanoparticles supported by new carbon materials. J Struct Chem 57, 1398–1406 (2016). https://doi.org/10.1134/S0022476616070143
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DOI: https://doi.org/10.1134/S0022476616070143