Study of oxygen self-diffusion in oxides by ion beam techniques: comparison between nuclear reaction analysis and SIMS

“…Additionally, different surface techniques that measure oxygen exchange as well as surface exchange and diffusion, would be of high interest because they would provide an insight into improving the design of these systems. Such techniques could include but are not limited to the use of secondary ion mass spectrometry or nuclear reaction analysis to determine isotopic exchange [211,212], conductivity relaxation experiments to determine ionic conductivity or in situ optical transmission relaxation coupled with impedance spectroscopy for oxygen surface exchange kinetics determination [213]. New methods might also need to be developed for measuring kinetic rates since in such materials these could potentially be dominated by interfaces [214].…”

Section: Advances In Science and Technology To Meet Challengesmentioning

confidence: 99%

Roadmap on exsolution for energy applications

et al. 2023

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Over the last decade, exsolution has emerged as a powerful new method for decorating oxide supports with uniformly dispersed nanoparticles for energy and catalytic applications. Due to their exceptional anchorage, resilience to various degradation mechanisms, as well as numerous ways in which they can be produced, transformed and applied, exsolved nanoparticles have set new standards for nanoparticles in terms of activity, durability and functionality. In conjunction with multifunctional supports such as perovskite oxides, exsolution becomes a powerful platform for the design of advanced energy materials. In the following sections, we review the current status of the exsolution approach, seeking to facilitate transfer of ideas between different fields of application. We also explore future directions of research, particularly noting the multi-scale development required to take the concept forward, from fundamentals through operando studies to pilot scale demonstrations.

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“…Then, in a second stage, the oxidation atmosphere is assured by an 18 O 2 atmosphere, and the oxidation has continuity in 18 O 2 for a shorter time than in 16 O 2 . This type of experiments provides through the oxide film a 18 O diffusion profile in the pre-grown oxide film that can be established by means of isotopic analysis techniques such as secondary ion mass spectrometry (SIMS) or by nuclear reaction analysis (NRA) using the reaction 18 O(p,α) 15 N [5]. From these diffusion profiles, may be deduced the effective, bulk and grain boundary diffusion coefficients for oxygen ion diffusion, which can be related to the growth rate of the oxide film by using Wagner´s theory [6].…”

Section: Introductionmentioning

confidence: 99%

Oxygen Diffusion Study in Oxidation Films of the AISI 304 Austenitic Stainless Steel

Sabioni

Ramos²,

et al. 2012

DDF

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Oxygen ion diffusion coefficient was measured, for the first time, in oxide films grown by the high temperature oxidation of the AISI 304 austenitic stainless steel. The steel samples were polished and then oxidized in synthetic air in order to grow the chromia oxide (Cr2O3) film. The oxygen diffusion experiments in the oxide films were performed by using the18O isotope as oxygen tracer. The isotope diffusion studies were performed from 750 to 900o C, in Ar +21%18O2 atmosphere and the oxygen ion diffusion profiles were established by secondary ion mass spectrometry (SIMS) analysis. From the18O diffusion profiles, the bulk, effective and grain boundary diffusivities were determined. Using Wagner´s theory, it is shown that, under the used experimental conditions, the oxygen ion diffusion is large enough to assure the growth rate of the chrome oxide films formed by the oxidation of the AISI 304 stainless steel.

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Study of oxygen self-diffusion in oxides by ion beam techniques: comparison between nuclear reaction analysis and SIMS

Cited by 10 publications

References 7 publications

Oxygen and Hydrogen Diffusion in Minerals

Oxygen and Hydrogen Diffusion in Minerals

Roadmap on exsolution for energy applications

Oxygen Diffusion Study in Oxidation Films of the AISI 304 Austenitic Stainless Steel

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