Ceria-Zirconia Solid Solutions (Ce1-xZrxO2-delta, x <= 0.2) for Solar Thermochemical Water Splitting: A Thermodynamic Study

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	Ceria-Zirconia Solid Solutions (Ce1-xZrxO2-delta, x <= 0.2) for Solar Thermochemical Water Splitting: A Thermodynamic Study
	Hao, Yong 1,2; Yang, Chih-Kai 1; Haile, Sossina M.1
刊名	CHEMISTRY OF MATERIALS
	2014-10-28
卷号	26 期号:20 页码:6073-6082
英文摘要	The redox behavior of ceriazirconia solid solutions (or Zr-substituted ceria, ZSC) with a Zr content of up to 20 mol % is studied by thermogravimetry (TG) between 600 degrees C and 1490 degrees C under controlled atmospheres. Thermodynamic properties, specifically standard oxidation enthalpy, triangle H-oxd(Theta), and entropy, triangle S-oxd(Theta), are derived from TG data. The raw TG results show that the extent of reduction is significantly increased (compared with undoped ceria), even at a low Zr substitution level of 5 mol %. Concomitantly, the magnitude of the thermodynamic functions dramatically decreases as a function of Zr content, particularly at low values of oxygen non-stoichiometry, delta (<3 mol %). Thermochemical fuel production from Zr-substituted ceria generally increases with increasing Zr content under both two-temperature and isothermal cycling conditions. In the case of two-temperature cycling, the benefit is accompanied by a penalty in the (computed) steam-to-hydrogen conversion ratio, whereas it is accompanied by a gain in this ratio for isothermal cycling. Overall, introduction of Zr has the potential to enhance solar-driven thermochemical fuel production, depending on the details of cycling conditions and reactor design.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Materials Science, Multidisciplinary
研究领域[WOS]	Chemistry ; Materials Science
关键词[WOS]	CEO2-ZRO2 MIXED OXIDES ; PHASE-TRANSITION ; REDUCTION ; CATALYSTS ; CO2 ; NONSTOICHIOMETRY
收录类别	SCI
语种	英语
WOS记录号	WOS:000343950300032
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/106016]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.CALTECH, Pasadena, CA 91125 USA 2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Hao, Yong,Yang, Chih-Kai,Haile, Sossina M.. Ceria-Zirconia Solid Solutions (Ce1-xZrxO2-delta, x <= 0.2) for Solar Thermochemical Water Splitting: A Thermodynamic Study[J]. CHEMISTRY OF MATERIALS,2014,26(20):6073-6082.
APA	Hao, Yong,Yang, Chih-Kai,&Haile, Sossina M..(2014).Ceria-Zirconia Solid Solutions (Ce1-xZrxO2-delta, x <= 0.2) for Solar Thermochemical Water Splitting: A Thermodynamic Study.CHEMISTRY OF MATERIALS,26(20),6073-6082.
MLA	Hao, Yong,et al."Ceria-Zirconia Solid Solutions (Ce1-xZrxO2-delta, x <= 0.2) for Solar Thermochemical Water Splitting: A Thermodynamic Study".CHEMISTRY OF MATERIALS 26.20(2014):6073-6082.