Enhancement effects of dopants and SiO2 support on mixed metal ferrites based two-step thermochemical water splitting
文献类型：期刊论文
| 作者 | Jiang, Zongxuan1; Chen, Zhenpan1,2; Jiang, Qingqing1; Tong, Jinhui1; Yang, Min1; Li, Can1 |
| 刊名 | SOLAR ENERGY
 |
| 出版日期 | 2017-03-01 |
| 卷号 | 144页码:643-659 |
| 关键词 | Solar Thermochemical Cycle H2o Splitting Ferrites Dopants Sio2 Support Kinetics |
| ISSN号 | 0038-092X |
| DOI | 10.1016/j.solener.2017.01.049 |
| 文献子类 | Article |
| 英文摘要 | Ferrites have emerged as potential materials in thermochemical fuel production due to its appreciated thermodynamic driving force of H2O/CO2 splitting and inexpensive. Herein, to enhance the utility of iron element and fuel release rate/production, dopants (such as Co, Mn, Sr, and Ce) and SiO2 support are used to improve the reactivity of LaFeO3/SiO2 derived two-step thermochemical water splitting (TCWS). It was found that the pure LaFeO3 perovskite shown negligible TCWS reactivity; cobalt doped into the structure of LaFeO3 could result in enhanced but limited utility of oxygen vacancy. Compared with unsupported LaFeO3, the actual redox phases of SiO2 supported samples are doped iron silicon oxides, (M,Fe)(3-x)SixO4 (M = dopants); the normalized molar iron based O-2 production (mL per mmol of Fe) is increased by 5-fold for LaFeO3 (25 wt%)/SiO2 and is further increased by 10 times for LaFe0.8Co0.2O3(25 wt%)/SiO2. It suggests that SiO2 support is helpful to disperse iron silicon oxides and alleviate sintering at high temperatures. XPS results reveal that the LaFeO3/SiO2 derived TCWS is driven by a repeated Fe2+/Fe3+ redox cycle and the utility of iron element is enhanced via the addition of cobalt dopant and SiO2 support. The cycle performance of LaFe0.8Co0.2O3 (25 wt%)/SiO2 demonstrated that similar to 2.8 mL O-2 g(material)(-1) and similar to 4.2 mL H-2 g(material)(-1) were stably released when the TCWS was operated between 1350 degrees C and 1100 degrees C. The total mass based O-2 and H-2 productions of LaFe0.8Co0.2O3 (50 wt%)/SiO2 can be further increased to similar to 4.5 and similar to 7.8 mL g(material)(-1), respectively. (C) 2017 Published by Elsevier Ltd. |
| WOS关键词 | SOLAR HYDROGEN-PRODUCTION ; KINETIC-ANALYSIS ; COBALT FERRITE ; NONISOTHERMAL EXPERIMENTS ; NONSTOICHIOMETRIC CERIA ; PEROVSKITE OXIDES ; HIGH-TEMPERATURES ; SOLID-SOLUTIONS ; CARBON-DIOXIDE ; REDOX SYSTEM |
| WOS研究方向 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000397550500064 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/169400]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Li, Can |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, 457 Zhongshan Rd, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Zongxuan,Chen, Zhenpan,Jiang, Qingqing,et al. Enhancement effects of dopants and SiO2 support on mixed metal ferrites based two-step thermochemical water splitting[J]. SOLAR ENERGY,2017,144:643-659. |
| APA | Jiang, Zongxuan,Chen, Zhenpan,Jiang, Qingqing,Tong, Jinhui,Yang, Min,&Li, Can.(2017).Enhancement effects of dopants and SiO2 support on mixed metal ferrites based two-step thermochemical water splitting.SOLAR ENERGY,144,643-659. |
| MLA | Jiang, Zongxuan,et al."Enhancement effects of dopants and SiO2 support on mixed metal ferrites based two-step thermochemical water splitting".SOLAR ENERGY 144(2017):643-659. |
入库方式： OAI收割
来源：大连化学物理研究所
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