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确定镧掺杂二氧化铈纳米立方体萤石结构中镧的最大掺入量以增强氧化还原能力。

Determining the maximum lanthanum incorporation in the fluorite structure of La-doped ceria nanocubes for enhanced redox ability.

作者信息

Loche Danilo, Morgan Lucy M, Casu Alberto, Mountjoy Gavin, O'Regan Colm, Corrias Anna, Falqui Andrea

机构信息

School of Physical Sciences, University of Kent Ingram Building Canterbury CT2 7NH UK

Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology 23955-6900 Thuwal Kingdom of Saudi Arabia

出版信息

RSC Adv. 2019 Feb 26;9(12):6745-6751. doi: 10.1039/c8ra09766f. eCollection 2019 Feb 22.

DOI:10.1039/c8ra09766f
PMID:35518478
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9061073/
Abstract

Ceria nanocubes have been doped with increasing amounts of lanthanum to enhance their redox ability. X-ray diffraction and transmission electron microscopy techniques provide a consistent picture indicating that there is an upper limit to the lanthanum that can be incorporated in the fluorite structure of ceria nanocubes, which is close to 7.5 mol% La. This limited loading is nevertheless able to produce a significant enhancement of the ceria redox ability as evidenced by use of X-ray absorption spectroscopy to determine the Ce/Ce ratio in samples submitted to a degassing treatment at room temperature.

摘要

已向二氧化铈纳米立方体中掺杂了越来越多的镧，以增强其氧化还原能力。X射线衍射和透射电子显微镜技术提供了一致的图像，表明可以掺入二氧化铈纳米立方体萤石结构中的镧存在上限，接近7.5 mol%的镧。然而，通过使用X射线吸收光谱法测定在室温下进行脱气处理的样品中的Ce/Ce比可以证明，这种有限的负载量仍能够显著提高二氧化铈的氧化还原能力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c88d/9061073/91e70c60afa4/c8ra09766f-f7.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c88d/9061073/0b7fae82c20b/c8ra09766f-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c88d/9061073/9826cd8cfa1e/c8ra09766f-f6.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c88d/9061073/5f91881e2670/c8ra09766f-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c88d/9061073/22a42f3d6fd9/c8ra09766f-f2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c88d/9061073/9826cd8cfa1e/c8ra09766f-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c88d/9061073/91e70c60afa4/c8ra09766f-f7.jpg

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Incorporation of Sb into CeO: local structural distortion of the fluorite structure from a pentavalent substituent.Sb 掺入 CeO：五价取代剂对萤石结构的局域结构扭曲。
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