Energy‐Dispersive EXAFS: Principles and Application in Heterogeneous Catalysis

Newton, Mark A.; Dent, Andrew J.

doi:10.1002/9781118355923.ch3

Cited by 11 publications

(6 citation statements)

References 97 publications

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“…Other analysis techniques utilize photons to circumvent the challenges associated with electrons (e.g., X-ray absorption spectroscopy, de Groot, 2001;Newton and Dent, 2013;Nachtegaal et al, 2017). An established optical technique is diffusive reflectance infrared Fourier transform spectroscopy (DRIFTS Terreni et al, 2020;Negahdar et al, 2020).…”

Section: Analysis Of Short-lived Interfacesmentioning

confidence: 99%

Short-Lived Interfaces in Energy Materials

Borgschulte¹,

Terreni²,

Fumey³

et al. 2022

Front. Energy Res.

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The kinetics of most chemical energy storage/conversion systems depend on the mass transport through matter, which is rate-limited by various kinetic barriers. The distinction of the barriers by static and dynamic interfaces helps in reducing their impact and therefore enhancing the overall kinetics. The concept is introduced along examples of static and dynamic interfaces in hydrogen storage, thermal energy storage in absorptive media, and electrochemical water splitting and CO2 reduction. In addition to the description of analysis methods to probe static and dynamic interfaces, the general strategy as well as concrete examples to overcome them are discussed.

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Section: Analysis Of Short-lived Interfacesmentioning

confidence: 99%

Short-Lived Interfaces in Energy Materials

Borgschulte¹,

Terreni²,

Fumey³

et al. 2022

Front. Energy Res.

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“…The challenge of all experimental methods is the determination of the exact amount and dynamics of hydrogen in/on the material during reaction. 9 As hydrogen has only one electron, its detection by analytical tools based on the interaction with electrons is challenging: core-level spectroscopies such as Xray photoelectron spectroscopy 10 and X-ray absorption 11,12 cannot be used as a quantitative method for hydrogen, and hydrogen is nearly invisible for X-ray diffraction. 13,14 A reliable probe must thus make use of the interaction with the proton, which is possible by nuclear magnetic resonance 15,16 and neutron techniques.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen in methanol catalysts by neutron imaging

Terreni

Billeter

Sambalova

et al. 2020

Phys. Chem. Chem. Phys.

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“…Most XAS measurements of dilute systems are achieved by detecting fluorescence from the element of interest. The prevalence of using fluorescence is because of the high sensitivity which requires an energy scanning method so that the excitation energy and fluorescence can be correlated 4 .…”

Section: Introductionmentioning

confidence: 99%

“…In Energy Dispersive XAS (EDXAS), a bent crystal monochromator is typically used to provide a focused x-ray beam that contains all the energies required to make an XAS measurement 4 . Bent crystal monochromators in either the Bragg (reflection) or Laue (transmission) geometry have been developed for EDXAS with the former being the first type to be developed, and the more frequently used 5–7 .…”

Section: Introductionmentioning

confidence: 99%

Wide field imaging energy dispersive X-ray absorption spectroscopy

Samadi

Martinson

et al. 2019

Sci Rep

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A new energy dispersive X-ray absorption spectroscopy (EDXAS) method is presented for simultaneous wide-field imaging and transmission X-ray absorption spectroscopy (XAS) to enable rapid imaging and speciation of elements. Based on spectral K-Edge Subtraction imaging (sKES), a bent Laue imaging system diffracting in the vertical plane was developed on a bend magnet beamline for selenium speciation. The high flux and small vertical focus, forming a wide horizontal line beam for projection imaging and computed tomography applications, is achieved by precise matching of lattice plane orientation and crystal surface (asymmetry angle). The condition generating a small vertical focus for imaging also provides good energy dispersion. Details for achieving sufficient energy and spatial resolution are demonstrated for both full field imaging and computed tomography in quantifying selenium chemical species. While this system has lower sensitivity as it uses transmission and may lack the flux and spatial resolution of a dedicated focused beamline system, it has significant potential in rapid screening of heterogeneous biomedical or environmental systems to correlate metal speciation with function.

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Energy‐Dispersive EXAFS: Principles and Application in Heterogeneous Catalysis

Cited by 11 publications

References 97 publications

Short-Lived Interfaces in Energy Materials

Short-Lived Interfaces in Energy Materials

Hydrogen in methanol catalysts by neutron imaging

Wide field imaging energy dispersive X-ray absorption spectroscopy

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