PtPd-NANOPARTICLES SUPPORTED BY NEW CARBON MATERIALS
T. I. Asanova1, I. P. Asanov1,2, V. A. Tur1, E. Yu. Gerasimov3, M. Brzhezinskaya4
1Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia
2Novosibirsk National Research University, Novosibirsk, Russia
3Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia
4Helmholtz Zentrum Berlin, Institute for Nanometre Optics and Technology, Berlin, Germany
Keywords: XAFS, РФЭС, биметаллические наночастицы PtPd, графен, терморасширенный графит, оксид графита, фторид графита, XPS, bimetallic nanoparticles, PtPd, graphene, thermal exfoliated graphite, oxide graphite, fluorinated graphite
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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