Topic
XANES
About: XANES is a research topic. Over the lifetime, 7737 publications have been published within this topic receiving 188032 citations.
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TL;DR: In this paper, an in situ IR, EPR, and high resolution XANES study on the Cu+−ZSM-5.2 complexes formed at 80 K was performed.
96 citations
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TL;DR: In this paper, X-ray photoelectron spectroscopy (XPS), Raman spectro-computed tomography (RSA), and Xray absorption near edge structure (XANES) was used to characterize the surface TaO5/TaO6 molecular structures of supported tantalum oxide catalysts.
Abstract: Supported tantalum oxide catalysts on Al2O3, TiO2, ZrO2, and SiO2 supports were prepared by the incipient wetness impregnation method. The catalysts were characterized by X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and X-ray absorption near edge structure (XANES) under hydrated and dehydrated conditions. The Al2O3-, TiO2-, and ZrO2-supported tantalum oxide catalysts possess similar surface TaOx molecular structures, consisting primarily of polymerized surface TaO5/TaO6 species at high surface coverage. The surface Ta atom density at monolayer coverage are also similar and were found to be 4.5, 6.6, and 6.3 Ta atoms/nm2 on the Al2O3, TiO2, and ZrO2 supports, respectively. The SiO2-supported tantalum oxide catalyst is very different and consists of isolated TaO4 species with a much lower maximum surface Ta density, 0.7 Ta atoms/nm2, due to the lower concentration and reactivity of the silica hydroxyls. The catalytic properties of the surface TaOx species were chemically probed with the metha...
95 citations
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TL;DR: In this paper, two different NPMCs, CNx and FeNC, were compared for activity toward oxygen reduction in acidic media and characterized using various techniques, including X-ray photoelectron spectroscopy (XPS), X-rays near-edge spectrograph (XANES), extended X-Ray absorption fine structure (EXAFS), superconducting quantum interference device (SQUID) magnetometry, inductive-couple plasma optical emission spectrometry (ICP-OES), and temperature-programmed oxidation (TPO).
95 citations
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TL;DR: In this paper, low and atmospheric-pressure plasma co-polymerisations of binary gas mixtures of C 2 H 4 and NH 3 or N 2, respectively, were investigated for depositing N-rich plasma polymer coatings for biomedical applications.
95 citations
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TL;DR: In this article, confocal Raman micro-spectrometers were used to investigate the reduction of aqueous Cr(VI) by pyrite and the solid phase formed during the reaction process.
95 citations