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Issue 43, 2020
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A surface sensitive hard X-ray spectroscopic method applied to observe the surface layer reduction reaction of Co oxide to Co metal

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Abstract

A simple and easy surface sensitive spectroscopic method using hard X-rays has been developed and applied to observe the surface oxide reduction reaction. The method named TREXS, Total REflection X-ray Spectroscopy, records the total reflection of incident X-rays at sample surfaces. The surface reduction reaction of Co oxide (Co3O4) to Co metal was successfully observed by in situ TREXS measurements with a surface sensitivity of ∼2 nm. The in situ TREXS measurements were performed under H2 flow of N2 balanced atmospheric pressure with increasing temperature. This method, in situ TREXS, will be a suitable and powerful tool to observe a variety of surface chemical reactions and consequently to understand catalytic processes under realistic operating conditions.

Graphical abstract: A surface sensitive hard X-ray spectroscopic method applied to observe the surface layer reduction reaction of Co oxide to Co metal

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Article information


Submitted
22 Apr 2020
Accepted
14 Oct 2020
First published
03 Nov 2020

Phys. Chem. Chem. Phys., 2020,22, 24974-24977
Article type
Paper

A surface sensitive hard X-ray spectroscopic method applied to observe the surface layer reduction reaction of Co oxide to Co metal

H. Abe, Y. Niwa and M. Kimura, Phys. Chem. Chem. Phys., 2020, 22, 24974
DOI: 10.1039/D0CP02155E

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