Topic
Extended X-ray absorption fine structure
About: Extended X-ray absorption fine structure is a research topic. Over the lifetime, 10452 publications have been published within this topic receiving 276744 citations.
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TL;DR: In this article, the size dependence of activity in gold catalysts was examined, and it was concluded that the observed decrease in activity with increasing particle size beyond 2 nm is controlled by the population of low-coordinate sites, rather than by size-dependent changes in overall electronic structure of the nanoparticle.
236 citations
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TL;DR: In this paper, an analytical expression for the optical absorption coefficient of silicon solar cells over a wide range of temperature, particularly when evaluating the concentration type systems, has been developed for this purpose.
Abstract: The optical absorption coefficient is an important parameter in calculating the performance characteristics of solar cells. For silicon solar cells it is desirable to know the absorption coefficient over the range of 1.1–4.0 eV and over a wide range of temperature, particularly when evaluating the concentration type systems. An analytical (empirical) expression has been developed for this purpose. We have interpreted the available experimental data in terms of three bands of silicon. With our fit, the experimental data can be explained to within an accuracy of 20% and its validity extends from 1.1 to 4.0 eV and over the temperature range of 20–500°K.
236 citations
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TL;DR: In this article, a graphene oxide-chitosan aerogel (GO-CS) was fabricated and utilized for uranium(VI) elimination, and the adsorption capacity for the uranium was evaluated as a function of contact time, solution pH, ionic strength, initial uranium concentration, and competing metal ions.
234 citations
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TL;DR: The X-ray absorption spectrum of the Rh K edge of a highly dispersed reduced 0.57 wt % Rh/ y-A1203 catalyst shows EXAFS oscillations due to rhodium-rhodium nearest neighbors, which proves the existence of rhodIUMmetal crystallites.
Abstract: The X-ray absorption spectrum of the Rh K edge of a highly dispersed reduced 0.57 wt % Rh/ y-A1203 catalyst
shows EXAFS oscillations due to rhodium-rhodium nearest neighbors, which proves the existence of rhodium
metal crystallites. Adsorption of CO at room temperature on the reduced catalyst significantly decreases the
amplitude of these EXAFS oscillations. This implies that CO adsorption on very small rhodium crystallites
leads to a disruption of a significant number of the metal-metal bonds.
233 citations
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TL;DR: In this article, X-ray diffraction measurements show that all the zinc oxide thin films are crystallized in the wurtzite form and present a preferred orientation along the [002] direction.
231 citations