DC pole | Wartość | Język |
dc.contributor.author | Szot, Krzysztof | - |
dc.contributor.author | Rodenbücher, Christian | - |
dc.contributor.author | Korte, Carsten | - |
dc.contributor.author | Schmitz-Kempen, Thorsten | - |
dc.contributor.author | Bette, Sebastian | - |
dc.date.accessioned | 2021-02-02T11:29:28Z | - |
dc.date.available | 2021-02-02T11:29:28Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | "APL Materials" (2021), Vol. 9, iss. 1, art. no. 011106, s. 1-9 | pl_PL |
dc.identifier.issn | 2166-532X | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/18754 | - |
dc.description.abstract | The investigation of the defect chemistry of solid oxides is of central importance for the understanding of redox processes. This can be
performed by measuring conductivity as a function of the oxygen partial pressure, which is conventionally established by using buffer gas
mixtures or oxygen pumps based on zirconia. However, this approach has some limitations, such as difficulty in regulating oxygen partial
pressure in some intermediate-pressure regions or the possibility of influencing the redox process by gases that can also be incorporated
into the oxide or react with the surface via heterogeneous catalysis. Herein, we present an alternative physical method in which the oxygen
partial pressure is controlled by dosing pure oxygen inside an ultra-high vacuum chamber. To monitor the conductivity of the oxide under
investigation, we employ a dedicated four-probe measurement system that relies on the application of a very small AC voltage, in combination
with lock-in data acquisition using highly sensitive electrometers, minimizing the electrochemical polarization or electro-reduction and
degradation effects. By analyzing the model material SrTiO3, we demonstrate that its characteristic redox behavior can be reproduced in good
agreement with the theory when performing simultaneous electrical conductivity relaxation and high-temperature equilibrium conductivity
measurements. We show that the use of pure oxygen allows for a direct analysis of the characteristic oxygen dose, which opens up various
perspectives for a detailed analysis of the surface chemistry of redox processes. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | chemistry | pl_PL |
dc.subject | solid metals | pl_PL |
dc.subject | physical invastigation | pl_PL |
dc.title | A physical method for investigating defect chemistry in solid metal oxides | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.1063/5.0033891 | - |
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