Speciation of raney copper oxide during high-temperature desulfurization

T. C. Wang, H. Paul Wang, C. Y. Chen, Hsin Liang Huang, Yu Ling Wei

研究成果: Conference contribution

摘要

Speciation of copper in the Raney copper oxides (R-CuO) during high-temperature desulfurization has been studied by X-ray absorption spectroscopy. The preedge XANES spectra (8975-8979 eV) of R-CuO exhibit a very weak 1s-to-3d transition forbidden by the selection rule in the case of the perfect octahedral symmetry. A shoulder at 8985-8988 eV and an intense band at 8994-9002 eV can be attributed to the 1s-to-4p transition that indicates the existence of the Cu(II) species. The preedge band at 8981-8984 eV can be attributed to the dipole-allowed 1s-to-4p transition of Cu(I), suggesting an existence of Cu2S during sulfurization. An enhanced absorbance at 9003 eV shows that Cu(0) species may be formed in the sulfurized R-CuO. The main copper species in regenerated R-CuO are CuO (96%) and Cu2S (4%).

原文English
主出版物標題X-RAY ABSORPTION FINE STRUCTURE - XAFS13
主出版物子標題13th International Conference
頁面705-707
頁數3
DOIs
出版狀態Published - 2007
事件X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference - Stanford, CA, United States
持續時間: 2006 7月 92006 7月 14

出版系列

名字AIP Conference Proceedings
882
ISSN(列印)0094-243X
ISSN(電子)1551-7616

Other

OtherX-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference
國家/地區United States
城市Stanford, CA
期間06-07-0906-07-14

All Science Journal Classification (ASJC) codes

  • 一般物理與天文學

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