A surface sensitive hard X-ray spectroscopic method applied to observe the surface layer reduction reaction of Co oxide to Co metal. Issue 43 (3rd November 2020)

• Record Type: Journal Article
• Authors: Abe, Hitoshi; Niwa, Yasuhiro; Kimura, Masao
• Is Part Of: Physical chemistry chemical physics. Volume 22:Issue 43(2020)
• Page Start: 24974
• Page End: 24977
• Publication Date: 2020-11-03
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d0cp02155e
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : In situ TREXS captures surface reactions. 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 (Co3 O4 ) 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.