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

doi:10.1063/1.4722785

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 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 language	English
Article number	231601
Journal	Applied Physics Letters
Volume	100
Issue number	23
DOIs	https://doi.org/10.1063/1.4722785
Publication status	Published - 2012 Jun 4
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Charge transfer effects in electrocatalytic Ni-C revealed by x-ray photoelectron spectroscopy",

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.",

author = "Haslam, {G. E.} and K. Sato and T. Mizokawa and Chin, {X. Y.} and Burstein, {G. T.}",

note = "Funding Information: Financial support for this research was gratefully received from the EPSRC, the Yousef Jameel Scholarship Fund, the New Zealand Foundation for Research, Science and Technology under Contract No. C08X0409, and the Japan Society for the Promotion of Science. Access to the XPS instrument was provided under EPSRC grant (No. EP/F019823/1). We thank Dr. David Morgan for assisting with the XPS.",

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doi = "10.1063/1.4722785",

language = "English",

volume = "100",

journal = "Applied Physics Letters",

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AU - Haslam, G. E.

AU - Sato, K.

AU - Mizokawa, T.

AU - Chin, X. Y.

AU - Burstein, G. T.

N1 - Funding Information: Financial support for this research was gratefully received from the EPSRC, the Yousef Jameel Scholarship Fund, the New Zealand Foundation for Research, Science and Technology under Contract No. C08X0409, and the Japan Society for the Promotion of Science. Access to the XPS instrument was provided under EPSRC grant (No. EP/F019823/1). We thank Dr. David Morgan for assisting with the XPS.

PY - 2012/6/4

Y1 - 2012/6/4

N2 - 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.

AB - 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.

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

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