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Issue 31, 2013
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Nature of the band gap and origin of the electro-/photo-activity of Co3O4

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Abstract

Co3O4 exhibits intriguing physical, chemical and catalytic properties and has demonstrated great potential for next-generation renewable energy applications. These interesting properties and promising applications are underpinned by its electronic structure and optical properties, which are unfortunately poorly understood and the subject of considerable debate over many years. Here, we unveil a consistent electronic structural description of Co3O4 by synergetic infrared optical and in situ photoemission spectroscopy as well as standard density functional theory calculations. In contrast to previous assumptions, we demonstrate a much smaller fundamental band gap, which is directly related to its efficient electro-/photo-activity. The present results may help to advance the fundamental understanding and provide guidance for the use of oxide materials in photocatalysis and solar applications.

Graphical abstract: Nature of the band gap and origin of the electro-/photo-activity of Co3O4

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Publication details

The article was received on 08 May 2013, accepted on 19 Jun 2013 and first published on 19 Jun 2013


Article type: Communication
DOI: 10.1039/C3TC30861H
J. Mater. Chem. C, 2013,1, 4628-4633

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    Nature of the band gap and origin of the electro-/photo-activity of Co3O4

    L. Qiao, H. Y. Xiao, H. M. Meyer, J. N. Sun, C. M. Rouleau, A. A. Puretzky, D. B. Geohegan, I. N. Ivanov, M. Yoon, W. J. Weber and M. D. Biegalski, J. Mater. Chem. C, 2013, 1, 4628
    DOI: 10.1039/C3TC30861H

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