Micro-beam XAFS reveals in-situ 3D exsolution of transition metal nanoparticles in accelerating hydrogen separation

Jianqiu Zhu; Yuxuan Zhang; Ze Liu; Jingzeng Cui; Ziting Xia; Jingyuan Ma; Jing Zhou; Zhiwei Hu; Jian-Qiang Wang; Xiangyong Zhao; Linjuan Zhang

doi:10.59717/j.xinn-mater.2024.100054

The Innovation Materials > 2024 Vol. 2 > No. 1 > 100054

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Micro-beam XAFS reveals in-situ 3D exsolution of transition metal nanoparticles in accelerating hydrogen separation

1.
Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, Shanghai 200234, China
2.
Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China
4.
Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
5.
Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, Dresden 01187, Germany

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Corresponding authors: zhanglinjuan@sinap.ac.cn (L. Z.); xyzhao@shnu.edu.cn (X. Z.); wangjianqiang@sinap.ac.cn (J. W.);
Received Date: 08 October 2023

Accepted Date: 22 February 2024

Published Online: 04 March 2024

The Innovation Materials 2(1), https://doi.org/10.59717/j.xinn-mater.2024.100054 | Cite this article

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GRAPHICAL ABSTRACT

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1. A perovskite-type hydrogen permeation membrane was synthesized.
  
  The valence evolution behavior of transition metals was investigated using X-ray absorption fine structure (XAFS).
  
  Revealing 3D exsolution of transition metal nanoparticles via micro-beam XAFS.

ABSTRACT

ABSTRACT

Perovskite-based membranes for hydrogen separation have garnered significant attention due to their exceptional capability in efficiently segregating and refining hydrogen. A successful strategy for enhancing the electronic conductivity and catalytic properties of perovskite-based membranes involves anchoring transition metal particles onto carriers composed of perovskite oxides at elevated temperatures. This study involved doping Fe, Co, and Ni elements into the B-site of the BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3-δ perovskite structure. We effectively demonstrated the exsolution of transition metal elements by combining X-ray absorption fine structure (XAFS) spectroscopy and electron microscopy. Furthermore, micro-beam XAFS analysis reveals that the exsolution of transition metals occurs not only at the surface but also within the bulk phase. This highlights the capability of micro-beam XAFS technique in elucidating changes in valence states of elements within bulk regions. Consequently, we have extended the concept of "nanoparticles for electronic conduction and catalysis" from two-dimensional surfaces to three-dimensional bulk phase structures for the first time.
- Hydrogen separation /
- Mixed proton-electron conductor /
- X-ray absorption spectra /
- Perovskite; Exsolution

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Zhu J., Zhang Y., Liu Z., et al., (2024). Micro-beam XAFS reveals in-situ 3D exsolution of transition metal nanoparticles in accelerating hydrogen separation. The Innovation Materials 2(1): 100054. https://doi.org/10.59717/j.xinn-mater.2024.100054

Zhu J., Zhang Y., Liu Z., et al., (2024). Micro-beam XAFS reveals in-situ 3D exsolution of transition metal nanoparticles in accelerating hydrogen separation. The Innovation Materials 2(1): 100054. https://doi.org/10.59717/j.xinn-mater.2024.100054

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Micro-beam XAFS reveals in-situ 3D exsolution of transition metal nanoparticles in accelerating hydrogen separation

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