Kinetics of competing exchange of oxygen and water at the surface of functional oxides

文献信息

发布日期 2021-01-14
DOI 10.1039/D0CP04953K
影响因子 3.676
作者

Vincent Thoréton, Mathew Niania, John Kilner


查看原文

摘要

The presence of water vapour in the input gas stream influences the performance of air electrodes of solid oxide cells. In this work, the oxygen transport kinetics were determined by isotopic exchange depth profiling at 350 °C on polycrystalline La0.6Sr0.4Co0.2Fe0.8O3−δ samples in humidified oxygen, comparing the differences in tracer diffusion profile using either 18O2 or H218O as the labelling medium. The apparent surface exchange coefficients of oxygen were determined in each case and used together to estimate the oxygen surface exchange coefficients of molecular oxygen and water. It was found that, in humid conditions, the surface exchange coefficient of molecular oxygen is significantly decreased in comparison to a reference in dry conditions. In addition, the surface exchange coefficient of water is higher than that for molecular oxygen. This is in good agreement with the hypothesis that, water monopolises the active exchange sites at the material surface and thus oxygen from water exchanges faster than the one of molecular oxygen.

相关文献

Asymmetric total synthesis of martinelline and martinellic acid

Shuhei Ikeda, Masatoshi Shibuya, Yoshiharu Iwabuchi

2006-11-01 Communication

DOI: 10.1039/B611121A

Synthesis and characterization of elusive cyclo-di- and -tri-phosphino-1,3-diphosphonium salts: fundamental frameworks in catena-organophosphorus chemistry

Susanne D. Riegel, Neil Burford, Michael D. Lumsden, Andreas Decken

2007-09-17 Communication

DOI: 10.1039/B707741F

Fast, efficient Ru(iv)-catalysed regioselective allylation of indoles using allyl alcohol (without additives) under mild conditions

Alexey B. Zaitsev, Stefan Gruber, Paul S. Pregosin

2007-10-15 Communication

DOI: 10.1039/B710763C

Optically sensed, molecular shuttles driven by acid–base chemistry

Sarah J. Vella, Jorge Tiburcio, Stephen J. Loeb

2007-09-10 Communication

DOI: 10.1039/B710708K

Cα,Cortho-Dimetalated phosphazene complexes‡

Jesús García López, Ignacio Fernández, Manuel Serrano Ruiz, Fernando López Ortiz

2007-08-28 Communication

DOI: 10.1039/B707320H

Activity-based fluorescent reporters for monoamine oxidases in living cells

Aaron E. Albers, Katherine A. Rawls, Christopher J. Chang

2007-10-09 Communication

DOI: 10.1039/B713190A

Front cover

Cover

DOI: 10.1039/B715693F

Front cover

Cover

DOI: 10.1039/B617900M

Formation of cage-like hollow spherical silicavia a mesoporous structure by calcination of lysozyme–silica hybrid particles

Tatsuo Tsunoda, Akiko Kawai, Fujio Mizukami, Kengo Sakaguchi

2007-08-21 Communication

DOI: 10.1039/B709534A

Selective binding of cucurbit[7]uril and β-cyclodextrin with a redox-active molecular triad Ru(bpy)3–MV2+–naphthol

Dapeng Zou, Samir Andersson, Rong Zhang, Shiguo Sun, Björn Åkermark, Licheng Sun

2007-10-23 Communication

DOI: 10.1039/B712980G

您可能还喜欢

化合物问答

什么是2-Bromo-1-(pyrimidin-2-yl)ethanone hydrobromide(CAS号:1588441-02-4)?

2-Bromo-1-(pyrimidin-2-yl)ethanone hydrobromide是一种有机化合物,分子式为C6H5Br2N2O2。它是一种溴代化合...

1588441-02-42-Bromo-1-(2-pyrimid...
化合物问答

在合成中是否有1-正-丁基-3-甲基咪唑鎓三氟甲烷磺酸盐(CAS号:174899-66-2)的替代品?

在合成中,可以考虑使用1-正-丁基-3-甲基咪唑鎓溴酸盐或1-正-丁基-3-甲基咪唑鎓氯酸盐作为替代品。这些化合物在性能上与1-正-丁基-3-甲基咪唑鎓三氟甲烷...

174899-66-21-Butyl-3-methyl-1H-...
化合物问答

2-methyl-5-thiophen-2-ylfuran-3-carboxylic acid(CAS号:651005-90-2)的市场或研究趋势如何?

目前,2-methyl-5-thiophen-2-ylfuran-3-carboxylic acid的研究主要集中在药物化学和新型材料领域。随着生物医药和有机合...

651005-90-22-Methyl-5-(thien-2-...
化合物问答

格列吡嗪杂质H(CAS号:13554-93-3)的主要用途是什么?

格列吡嗪杂质H主要作为药物中间体或副产物存在,并无特定的工业应用。在药物生产中,它可能需要被处理掉以保证最终药物的质量。

13554-93-3Ethyl (2-(4-((cycloh...
化合物问答

如何储存(9ci)-4-甲氧基-1H-苯并咪唑-2-乙腈(CAS号:317817-41-7)?

(9ci)-4-甲氧基-1H-苯并咪唑-2-乙腈应储存在阴凉、干燥、通风良好的地方,避免阳光直射。使用密封的玻璃或塑料容器储存,并确保容器的密封性良好,以防止挥...

317817-41-7(4-Methoxy-1H-benzim...
化合物问答

4,5,9,10-四氢苯芘(CAS号:781-17-9)应用于哪些行业?

4,5,9,10-四氢苯芘在医药行业用于作为某些药物的中间体,在聚合物行业用作添加剂提升材料的热稳定性,在传感器领域作为传感器的敏感材料,在半导体行业中用作掺杂...

781-17-94,5,9,10-Tetrahydrop...
化合物问答

处理叶酸-D4(CAS号:171777-72-3)时应注意哪些实验室安全事项?

处理叶酸-D4时应佩戴个人防护装备(PPE),如手套和实验服。操作应在通风橱内进行,以避免吸入蒸汽或粉尘。如果不慎泄露,应立即用大量清水冲洗,并通知安全人员。参...

171777-72-3Folic Acid-d4
化合物问答

如何处理含有6-溴-2-(三氟乙酰基)-1,2,3,4-四氢异喹啉(CAS号:252331-63-8)的废料?

含有该化合物的废料应收集到专用的容器中,并进行密封以防止挥发和泄漏。在处理前,需进行危险性评估,以确定是否需要进行化学处理。最终处置需遵循当地的危险废物管理规定...

252331-63-81-(6-bromo-3,4-dihyd...
化合物问答

4,5-二氟-2-甲氧基苯甲醛(CAS号:145742-34-3)的主要用途是什么?

4,5-二氟-2-甲氧基苯甲醛主要用作有机合成中的中间体,特别是在制药和农药领域。它可以作为合成其他有机化合物的原料。

145742-34-34,5-difluoro-2-metho...
化合物问答

5-溴-6-三氟甲基吲哚(CAS号:1198475-24-9)安全吗?

5-溴-6-三氟甲基吲哚作为一种化学试剂,具有一定的毒性,需要在通风橱中操作,并采取适当的安全措施以避免吸入、皮肤接触和眼睛刺激。应避免与皮肤和眼睛直接接触,并...

1198475-24-95-bromo-6-(trifluoro...

来源期刊

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
自引率: 10.3%
年发文量: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

推荐供应商

免责声明
本页面提供的学术期刊信息仅供参考和研究使用。我们与任何期刊出版商均无关联,也不处理投稿事宜。如有投稿相关咨询,请直接联系相关期刊出版商。
如发现页面信息有误,请发送邮件至 support@chemtradehub.com 联系我们。我们将及时核实并处理您的问题。