Solid-State Si-29 NMR and Neutron-Diffraction Studies of Sr0.7K0.3SiO2.85 Oxide Ion Conductors
文献类型：期刊论文
| 作者 | Xu, Jungu1; Wang, Xiaoming2; Fu, Hui2; Brown, Craig M.3,4; Jing, Xiping2; Liao, Fuhui2; Lu, Fengqi5; Li, Xiaohui5; Kuang, Xiaojun1,5; Wu, Mingmei1 |
| 刊名 | INORGANIC CHEMISTRY
 |
| 出版日期 | 2014-07-07 |
| 卷号 | 53期号:13页码:6962-6968 |
| ISSN号 | 0020-1669 |
| DOI | 10.1021/ic500891j |
| 英文摘要 | K/Na-doped SrSiO3-based oxide ion conductors were recently reported as promising candidates for low-temperature solid-oxide fuel cells. Sr0.7K0.3SiO2.85, close to the solid-solution limit of Sr1-xKxSiO3-0.5x, was characterized by solid-state Si-29 NMR spectroscopy and neutron powder diffraction (NPD). Differing with the average structure containing the vacancies stabilized within the isolated Si3O9 tetrahedral rings derived from the NPD study, the (29Si) NMR data provides new insight into the local defect structure in Sr0.7K0.3SiO2.85. The Q(1)-linked tetrahedral Si signal in the Si-29 NME. data suggests that the Si3O9 tetrahedral rings in the K-doped SrSiO3 materials were broken, forming Si3O8 chains. The Si3O8 chains can be stabilized by either bonding with the oxygen atoms of the absorbed lattice water molecules, leading to the Q(1)-linked tetrahedral Si, or sharing oxygen atoms with neighboring Si3O9 units, which is consistent with the Q(3)-linked tetrahedral Si signal detected in the Si-29 NMR spectra. |
| 语种 | 英语 |
| WOS记录号 | WOS:000338748100064 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/52263]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Kuang, Xiaojun |
| 作者单位 | 1.Sun Yat Sen Univ, MOE Key Lab Bioinorgan & Synthet Chem, State Key Lab Optoelect Mat & Technol, Sch Chem & Chem Engn, Guangzhou 510275, Guangdong, Peoples R China 2.Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China 3.NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA 4.Univ Delaware, Dept Chem & Biomol Engn, Newark, DE 19716 USA 5.Guilin Univ Technol, Guangxi Minist Prov Jointly Constructed Cultivat, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Coll Mat Sci & Engn, Guilin 541004, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Jungu,Wang, Xiaoming,Fu, Hui,et al. Solid-State Si-29 NMR and Neutron-Diffraction Studies of Sr0.7K0.3SiO2.85 Oxide Ion Conductors[J]. INORGANIC CHEMISTRY,2014,53(13):6962-6968. |
| APA | Xu, Jungu.,Wang, Xiaoming.,Fu, Hui.,Brown, Craig M..,Jing, Xiping.,...&Wu, Mingmei.(2014).Solid-State Si-29 NMR and Neutron-Diffraction Studies of Sr0.7K0.3SiO2.85 Oxide Ion Conductors.INORGANIC CHEMISTRY,53(13),6962-6968. |
| MLA | Xu, Jungu,et al."Solid-State Si-29 NMR and Neutron-Diffraction Studies of Sr0.7K0.3SiO2.85 Oxide Ion Conductors".INORGANIC CHEMISTRY 53.13(2014):6962-6968. |
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来源：化学研究所
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