期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 1, 期 31, 页码 4628-4633出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc30861h
关键词
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资金
- Scientific User Facilities Division, Office of Basic Energy Sciences, U. S. Department of Energy
- U. S. Department of Energy, Office of Science, Basic Energy Science, Materials Sciences and Engineering Division
- National Natural Science Foundation of China [11004023]
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.
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