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Exsolution trends and co-segregation aspects of self-grown catalyst nanoparticles in perovskites
Open accessAbstract
In perovskites, exsolution of transition metals has been proposed as a smart catalyst design for energy applications. Although there exist transition metals with superior catalytic activity, they are limited by their ability to exsolve under a reducing environment. When a doping element is present in the perovskite, it is often observed that the surface segregation of the doping element is changed by oxygen vacancies. However, the mechanism of co-segregation of doping element with oxygen vacancies is still an open question. Here we report trends in the exsolution of transition metal (Mn, Co, Ni and Fe) on the PrBaMn 2 O 5+δ layered perovskite oxide related to the co-segregation energy. Transmission electron microscopic observations show that easily reducible cations (Mn, Co and Ni) are exsolved from the perovskite depending on the transition metal-perovskite reducibility. In addition, using density functional calculations we reveal that co-segregation of B-site dopant and oxygen vacancies plays a central role in the exsolution.
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Cites
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set
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Special points for Brillouin-zone integrations
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Solvent engineering for high-performance inorganic–organic hybrid perovskite solar cells
Jeon, N. J., Noh, J. H., Kim, Y. C., Yang, W. S., Ryu, S., & Seok, S. I. (2014) · Nature Materials · doi:10.1038/nmat4014 · Cited by 6,723
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Chemical looping beyond combustion – a perspective
Zhu, X., Imtiaz, Q., Donat, F., Müller, C. R., & Li, F. (2020) · Energy & Environmental Science · doi:10.1039/c9ee03793d · Cited by 538
Heterointerface engineering for enhancing the electrochemical performance of solid oxide cells
Zhao, C., Li, Y., Zhang, W., Zheng, Y., Lou, X., Yu, B., Chen, J., Chen, Y., Liu, M., & Wang, J. (2020) · Energy & Environmental Science · doi:10.1039/c9ee02230a · Cited by 319
Metadata
- Authors
- Kwon, O., Sengodan, S., Kim, K., Kim, G., Jeong, H. Y., Shin, J., Ju, Y.-W., Han, J. W., & Kim, G.
- Venue
- Nature Communications
- Published
- 2017-06-28
- Volume
- 8
- Issue
- 1
- Pages
- 15967-15967
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2731464364
- Cited by
- 500
- References
- 3
- FWCI
- 15.13
- Type
- journal article
- Language
- en
- Open access
- gold
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- Kwon, O., Sengodan, S., Kim, K., Kim, G., Jeong, H. Y., Shin, J., Ju, Y.-W., Han, J. W., & Kim, G. (2017). Exsolution trends and co-segregation aspects of self-grown catalyst nanoparticles in perovskites. Nature Communications. https://doi.org/10.1038/ncomms15967
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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