Call, Friedemann and Roeb, Martin and Schmücker, Martin and Bru, Hélène and Curulla-Ferre, Daniel and Sattler, Christian and Pitz-Paal, Robert (2013) Thermogravimetric Analysis of Zirconia-Doped Ceria for Thermochemical Production of Solar Fuel. American Journal of Analytical Chemistry (AJAC), 4 (10A), pp. 37-45. Scientific Research Publishing. doi: 10.4236/ajac.2013.410A1005. ISSN 2156-8251.
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Official URL: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=37313
Abstract
Developing an efficient redox material is crucial for thermochemical cycles that produce solar fuels (e.g. H2 and CO), enabling a sustainable energy supply. In this study, zirconia-doped cerium oxide (Ce1−xZrxO2) was tested in CO2-split- ting cycles for the production of CO. The impact of the Zr-content on the splitting performance was investigated within the range 0 ≤ x < 0.4. The materials were synthesized via a citrate nitrate auto combustion route and subjected to ther- mogravimetric experiments. The results indicate that there is an optimal zirconium content, x = 0.15, improving the specific CO2-splitting performance by 50% compared to pure ceria. Significantly enhanced performance is observed for 0.15 ≤ x ≤ 0.225. Outside this range, the performance decreases to values of pure ceria. These results agree with theo- retical studies attributing the improvements to lattice modification. Introducing Zr4+ into the fluorite structure of ceria compensates for the expansion of the crystal lattice caused by the reduction of Ce4+ to Ce3+. Regarding the reaction conditions, the most efficient composition Ce0.85Zr0.15O2 enhances the required conditions by a temperature of 60 K or one order of magnitude of the partial pressure of oxygen p(O2) compared to pure ceria. The optimal composition was tested in long-term experiments of one hundred cycles, which revealed declining splitting kinetics.
Item URL in elib: | https://elib.dlr.de/84536/ | ||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||
Title: | Thermogravimetric Analysis of Zirconia-Doped Ceria for Thermochemical Production of Solar Fuel | ||||||||||||||||||||||||
Authors: |
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Date: | October 2013 | ||||||||||||||||||||||||
Journal or Publication Title: | American Journal of Analytical Chemistry (AJAC) | ||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||
Gold Open Access: | Yes | ||||||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||||||
Volume: | 4 | ||||||||||||||||||||||||
DOI : | 10.4236/ajac.2013.410A1005 | ||||||||||||||||||||||||
Page Range: | pp. 37-45 | ||||||||||||||||||||||||
Publisher: | Scientific Research Publishing | ||||||||||||||||||||||||
ISSN: | 2156-8251 | ||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||
Keywords: | Water Splitting; CO2 Splitting; Thermochemical Cycle; Ceria; CO; Solar Fuels; Hydrogen; H2; Zirconia; Synthesis Gas | ||||||||||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||||||||||
HGF - Program: | Renewable Energies | ||||||||||||||||||||||||
HGF - Program Themes: | Concentrating Solar Systems (old) | ||||||||||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||||||||||
DLR - Program: | E SF - Solar research | ||||||||||||||||||||||||
DLR - Research theme (Project): | E - Solare Verfahrenstechnik (old) | ||||||||||||||||||||||||
Location: | Köln-Porz | ||||||||||||||||||||||||
Institutes and Institutions: | Institute of Solar Research > Solare Verfahrenstechnik Institute of Materials Research > Keramische Strukturwerkstoffe | ||||||||||||||||||||||||
Deposited By: | Sattler, Prof. Dr. Christian | ||||||||||||||||||||||||
Deposited On: | 17 Oct 2013 14:10 | ||||||||||||||||||||||||
Last Modified: | 17 Oct 2013 14:10 |
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