Analysis of local structure of Ru1-xNixO2 electrocatalytic materials

V. Petrykin, K. MacOunova, M. Okube, J. Franc, P. Krtil

Research output: Contribution to journalArticlepeer-review

Abstract

Nanocrystalline 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.

Original languageEnglish
Article number012166
JournalJournal of Physics: Conference Series
Volume190
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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