First-Principles Insights into the Oxidation States and Electronic Structures of Ceria-Based Binary, Ternary, and Quaternary Oxides
First-Principles Insights into the Oxidation States and Electronic Structures of Ceria-Based Binary, Ternary, and Quaternary Oxides
复制标题
对二元、三元和四元氧化物的氧化态和电子结构的第一性原理见解
DOI:
10.1021/acs.jpcc.8b09852
复制
发表时间:
2018-12
影响因子:
3.7
通讯作者:
Hu Shu Xian
中科院分区:
文献类型:
--
作者:
Ao Bingyun;Qiu Ruizhi;Hu Shu Xian
Ceria and ceria-based materials have versatile technological and industrial applications physically ascribed to the flexible fluctuation of the Ce oxidation state between Ce4+ and Ce3+. Considerable multidisciplinary research has been carried out to obtain the Ce oxidation state, which is crucial for their application; however, a rigorous and physically correct determination of the oxidation state is still lacking. Here, we conduct first-principles DFT + U calculations to unambiguously determine the physical oxidation state of Ce in ceria-based materials, such as homogenous CenO2n–2 (n = 7, 9, 10, 11, and 12), ceria doped by multivalent Ti and V, Ce–Ti(V)–O ternary compounds, and Ce–Ti–V–O quaternary compounds. The results show that the Ce oxidation state depends on the local structure and chemical surrounding: oxygen vacancy facilitates the transition from Ce4+ to Ce3+, which is consistent with the localization of Ce 4f electrons; Ti and V with the 3d energy levels higher than 4f energy levels of Ce gene...
登录
查看更多内容
影响因子:
4.6
作者:
Qiu R;Zhang Y;Ao B
通讯作者:
Ao B
影响因子:
3.7
作者:
E. Shoko;M. Smith;R. McKenzie
通讯作者:
E. Shoko;M. Smith;R. McKenzie
影响因子:
5.7
作者:
Ahmadi, M.;Mistry, H.;Roldan Cuenya, B.
通讯作者:
Roldan Cuenya, B.
影响因子:
6.2
作者:
Z. Kang;L. Eyring
通讯作者:
Z. Kang;L. Eyring
影响因子:
3.2
作者:
N. Knoblauch;H. Simon;M. Schmücker
通讯作者:
N. Knoblauch;H. Simon;M. Schmücker