Charge transfer effects in electrocatalytic Ni-C revealed by x-ray photoelectron spectroscopy

G. E. Haslam, K. Sato, Takashi Mizokawa, X. Y. Chin, G. T. Burstein

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Binary Ni-C thin-film alloys, which have been shown to be passive against corrosion in hot sulphuric acid solution whilst also being electrocatalytically active, were investigated by XPS to determine the oxidation state of the metal and carbon components. The Ni component produces a Ni 2p spectrum similar to that of metallic nickel (i.e., no oxidation occurs) but with a 0.3 eV shift to higher binding energy (BE) due to electron donation to the carbon matrix. The C 1s peak shows a shift to lower BE by accepting electrons from the Ni nanocrystals. A cluster-model analysis of the observed Ni 2p spectrum is consistent with the electron transfer from the nickel to the carbon.

Original languageEnglish
Article number231601
JournalApplied Physics Letters
Volume100
Issue number23
DOIs
Publication statusPublished - 2012 Jun 4
Externally publishedYes

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x ray spectroscopy
charge transfer
photoelectron spectroscopy
carbon
binding energy
nickel
oxidation
shift
corrosion
nanocrystals
electron transfer
electrons
acids
matrices
thin films
metals

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Charge transfer effects in electrocatalytic Ni-C revealed by x-ray photoelectron spectroscopy. / Haslam, G. E.; Sato, K.; Mizokawa, Takashi; Chin, X. Y.; Burstein, G. T.

In: Applied Physics Letters, Vol. 100, No. 23, 231601, 04.06.2012.

Research output: Contribution to journalArticle

Haslam, G. E. ; Sato, K. ; Mizokawa, Takashi ; Chin, X. Y. ; Burstein, G. T. / Charge transfer effects in electrocatalytic Ni-C revealed by x-ray photoelectron spectroscopy. In: Applied Physics Letters. 2012 ; Vol. 100, No. 23.
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