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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국진공학회(ASCT) Applied Science and Convergence Technology Applied Science and Convergence Technology Vol.25 No.1
- 발행연도
- 2016.1
- 수록면
- 19 - 24 (6page)
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In this study, we evaluated the change of electronic structure during redox process in cerium-doped ZrO₂ grown by sol gel method. By sol-gel method, we could obtain cerium-doped ZrO₂ in high oxygen partial pressure and low temperature. After post annealing process in nitrogen ambient, the film is deoxidized. We used spectroscopic and theoretical methods to analysis change of electronic structure. X-ray absorption spectroscopy (XAS) for O K1-edge and Density Functional Theory (DFT) calculation using VASP code were performed to verify the electronic structure of the film. Also, high resolution x-ray photoelectron spectroscopy (HRXPS) for Ce 3d was carried out to confirm chemical bond of cerium doped ZrO₂. Through the investigation of the electronic structure, we verified as followings. (1) During reduction process, binding energy of oxygen is increase. Simultaneously, oxidation state of cerium was change to 4+ to 3+. (2) Cerium 4+ and cerium 3+ states were generated at different energy level. (3) Absorption states in O K edge were mainly originated by Ce 4+ f<SUB>0</SUB> and Ce 3+, while occupied states in valance band were mainly originated from Ce 4+ f₂.
목차
Abstract
I. Introduction
II. Experiment
III. Result and Discussion
IV. Conclusions
References
참고문헌 (16)
참고문헌 신청
Kašpar J, Fornasiero P, and Graziani M. Use of CeO2-based oxides in the three-way catalysis. Catal Today. 50(2) 285-98 (1999).
Hasegawa Y, Imanaka N, and Adachi G-y. Cerium ion conducting solid electrolyte. J Solid State Chem. 171(1-2) 387-90.
Skorodumova NV, Simak SI, and Lundqvist BI, Abrikosov IA, Johansson B. Quantum Origin of the Oxygen Storage Capability of Ceria. Phys Rev Lett. 89(16) 166601 (2002).
Suda A, Sobukawa H, Suzuki T, Kandori T, Ukyo Y, and Sugiura M. Store and Release of Oxygen of Ceria-Zirconia Solid Solution Synthesized by Solid Phase Reaction at Near Room Temperature. J Ceram Soc Jpn. 109(1267) 177-80 (2001).
Sugiura M. Oxygen Storage Materials for Automotive Catalysts: Ceria-Zirconia Solid Solutions. Catal Surv Asia. 7(1) 77-87 (2003).
Hasegawa Y, Imanaka N, and Adachi G-y. Cerium ion conducting solid electrolyte. J Solid State Chem. 171(1-2) 387-90.
Skorodumova NV, Simak SI, and Lundqvist BI, Abrikosov IA, Johansson B. Quantum Origin of the Oxygen Storage Capability of Ceria. Phys Rev Lett. 89(16) 166601 (2002).
Suda A, Sobukawa H, Suzuki T, Kandori T, Ukyo Y, and Sugiura M. Store and Release of Oxygen of Ceria-Zirconia Solid Solution Synthesized by Solid Phase Reaction at Near Room Temperature. J Ceram Soc Jpn. 109(1267) 177-80 (2001).
Sugiura M. Oxygen Storage Materials for Automotive Catalysts: Ceria-Zirconia Solid Solutions. Catal Surv Asia. 7(1) 77-87 (2003).
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UCI(KEPA) : I410-ECN-0101-2019-420-001275966