AI Article Synopsis
- A composite material consisting of CeO as an oxygen gateway and LaOSO as an oxygen reservoir was developed, enhancing both oxygen release and storage performance.
- The presence of Pt catalysts improved the anaerobic CO oxidation process, and experimental techniques showed that CeO accelerated redox reactions while keeping its structure intact.
- The interaction between CeO and LaOSO allows for a more efficient oxygen transfer, as CO primarily reacts with the lattice oxygen in CeO, creating vacancies that are then filled by oxygen from LaOSO, showcasing the benefits of having these materials closely combined.
Article Abstract
A synergistic enhancement in oxygen release/storage performance was achieved with composites formed between CeO as an oxygen gateway and LaOSO as an oxygen reservoir. CeO smoothly transfers oxygen atoms between LaOSO and the gas phase, whereas LaOSO stores a large amount of oxygen. The composite materials exhibited enhanced anaerobic CO oxidation and reversible oxygen storage in the presence of impregnated Pt catalysts as compared to their individual constituents (Pt/CeO and Pt/LaOSO). In situ X-ray diffraction and Raman experiments demonstrated that CeO significantly accelerated the redox reaction between LaOSO (S) and LaOS (S), while preserving its structure. The reaction between CO and CeO/O-labeled LaOSO composites suggested that CO mainly reacted with the lattice oxygen atoms of CeO, and the resulting oxygen vacancies were subsequently filled with oxygen atoms supplied by LaOSO. This oxygen gateway effect of CeO greatly enhanced the oxygen release/storage rates of LaOSO, while maintaining the high oxygen storage capacity, which is an advanced feature of oxysulfate materials. The synergistic effect is mostly pronounced when the two different oxygen storage materials are in intimate contact to form a three-phase boundary.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6640794 | PMC |
| http://dx.doi.org/10.1021/acsomega.6b00262 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!