Abstract
Soft X-ray emission spectra in the O K region of oxygen incorporated in microporous carbon were measured using synchrotron radiation, in order to observe directly the oxygen on the graphitic surface in micropores and obtain information about its chemical bonding states. The O K X-ray emission spectra of the microporous carbon exhibited a main peak at 526 eV with a low-energy tail, and the reference compounds also exhibited similar spectral features. A spectral feature analysis of the reference compounds using discrete variational Xα molecular orbital calculations showed that the measured 526-eV peaks of the microporous carbon may be due to O2p orbitals and the low-energy tails be to the hybridized O2p/O2s orbitals.
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