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

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

*この研究の対応する著者

研究成果: Article査読

10 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号231601
ジャーナルApplied Physics Letters
100
23
DOI
出版ステータスPublished - 2012 6 4
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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