V Petrykin et al 2009 J. Phys.: Conf. Ser. 190 012166 doi:10.1088/1742-6596/190/1/012166
V Petrykin1, K Macounova1, M Okube2, J Franc1 and P Krtil1
Show affiliationsNanocrystalline Ru1-xNixO2 materials were synthesized by a solution method. Local structure around doped Ni atoms was characterized by extended X-ray absorption fine structure (EXAFS) functions obtained from X-ray absorption spectra acquired at Ni-K edge (8333eV). It was found that Ni ions are confined to the Ru site in the RuO2 rutile-type crystal structure, and Ni atoms tend to group by entering neighbouring sites along the body diagonal of rutile lattice. Such a neighbourhood of two Ni atoms may act as an active site for oxygen evolution by promoting simultaneous two electron transfer from the absorbed molecule of water. The refined Ni-O bond distances suggest that oxidation state of Ni ions is between +2 and +3.
82.45.Yz Nanostructured materials in electrochemistry
78.70.Dm X-ray absorption spectra
81.16.-c Methods of nanofabrication and processing
82.30.-b Specific chemical reactions; reaction mechanisms
Condensed matter: electrical, magnetic and optical
Surfaces, interfaces and thin films
Issue 1 (2009)
V Petrykin et al 2009 J. Phys.: Conf. Ser. 190 012166
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