- Title
- Thermodynamic guiding principles for designing nonstoichiometric redox materials for solar thermochemical fuel production : ceria, perovskites, and beyond
- Creator
- Li, Sha; Wheeler, Vincent; Kumar, Apurv; Venkataraman, Mahesh; Muhich, Chrisopher
- Date
- 2022
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/180347
- Identifier
- vital:15737
- Identifier
-
https://doi.org/10.1002/ente.202000925
- Identifier
- ISBN:2194-4288 (ISSN)
- Abstract
- Two-step solar thermochemical water splitting is a promising pathway for renewable fuel production due to its potential for high thermal efficiency via full-spectrum sunlight utilization. Such a promise critically relies on simultaneous innovation in the redox materials and the reactor systems. Most prior efforts on material design are focused on improving the fuel yield at lower reduction temperatures. However, developing materials with both high fuel output and efficiency remains a key challenge, requiring a rigorous understanding of the effects of material thermodynamic properties. Herein, a generic thermodynamic framework is described to decipher the material effects by studying both the state-of-the-art and hypothetical materials within a counterflow reactor system. A global efficiency map is presented for redox materials, revealing inevitable tradeoffs among competing factors such as thermal losses, sweep gas and oxidizer demand, solid preheating, and reduction enthalpy. The choice of the most efficient material is closely linked to the system conditions. Ceria-based materials outperform perovskites under most scenarios, and the optimal hypothetical materials tend to favor higher reduction enthalpies and entropies than existing materials. This work offers a valuable material design roadmap to identify solutions toward efficient solar fuel production. © 2021 Wiley-VCH GmbH. **Please note that there are multiple authors for this article therefore only the name of the first 5 including Federation University Australia affiliate “Apurv Kumar” is provided in this record**
- Publisher
- John Wiley and Sons Inc
- Relation
- Energy Technology Vol. 10, no. 1 (2022), p.
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- Copyright © 2021 Wiley-VCH GmbH
- Subject
- 0904 Chemical Engineering; 0906 Electrical and Electronic Engineering; 0912 Materials Engineering
- Reviewed
- Funder
- The authors gratefully acknowledge the financial support of the China Scholarship Council (S.L.; grant no. [2015]3022 and 201506020092) and the Australian Research Council (W.L.; Future Fellowship, award no. FT140101213).
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