Plasma Driven Exsolution for Nanoscale Functionalization of Perovskite Oxides
| Autor: | Rakesh Sharma, Mauritius C. M. van de Sanden, V. Kyriakou, Oreste De Luca, Petra Rudolf, S Stefan Welzel, Mihalis N. Tsampas, Wonjong Yu, Dragos Neagu, F. J. J. Peeters, Suk Won Cha, Arunkumar Pandiyan |
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| Přispěvatelé: | Product Technology, Surfaces and Thin Films |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
exsolution Nucleation Oxide perovskites Nanoparticle General Chemistry Electrochemistry Electrochemical cell Catalysis nanostructuring chemistry.chemical_compound Chemical engineering chemistry Surface modification General Materials Science metal nanoparticles TP155 plasma Perovskite (structure) |
| Zdroj: | Small methods, 5(12):2100868. WILEY-V C H VERLAG GMBH Small Methods, 5, 2100868 |
| ISSN: | 2366-9608 |
| Popis: | Perovskite oxides with dispersed nanoparticles on their surface are considered instrumental in energy conversion and catalytic processes. Redox exsolution is an alternative method to the conventional deposition techniques for directly growing well-dispersed and anchored nanoarchitectures from the oxide support through thermochemical or electrochemical reduction. Herein, we show a new method for such nanoparticle nucleation through the exposure of the host perovskite to plasma. The applicability of this new method was demonstrated by performing catalytic tests for CO2 hydrogenation over Ni exsolved nanoparticles prepared by either plasma or conventional H2 reduction. Compared to the conventional thermochemical H2 reduction, there were plasma conditions that led to the exsolution of more than ten times higher Ni amount from a lanthanum titanate perovskite, which is similar to the reported values of the electrochemical method. Unlike the electrochemical method, however, plasma does not require the integration of the material in an electrochemical cell, and is thus applicable to a wide range of microstructures and physical forms. Additionally, when N2 plasma was employed, the nitrogen species stripped out oxygen from the perovskite lattice, generating a key chemical intermediate, such as NO, rendering this technology even more appealing. Funding: SynCat@DIFFER NWO-731.016.301, Electricity to Chemistry |
| Databáze: | OpenAIRE |
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