Combined energy dispersive EXAFS and x-ray diffraction

Abstract

An in situ experiment to measure both x-ray absorption spectroscopy and x-ray diffraction of aurichalcite is described. The experiment uses position sensitive detectors to enable both data sets to be collected while the sample is slowly decomposed in air and then reduced in hydrogen.

Operando spatially and time-resolved X-ray absorption spectroscopy and infrared thermography during oscillatory CO oxidation

“…Already at an early stage, the great potential of the quartz capillary microreactor for combining complementary characterization techniques became obvious: first by combining XAS and XRD [6,12,17], extended with the combination with SAXS [18] and later complemented with Raman spectroscopy [19]. Moreover, the reactor allows to monitor structural gradients in a fixed-bed reactor [20], similar to the gradients in reactant concentration, temperature, as well as adsorbate and surface speciation observed, for example using spaci-MS [21][22][23], diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) [24], and Raman spectroscopy [25].…”

Determination of the electronic and structural configuration of coordination compounds by synchrotron-radiation techniques

“…For all classes of samples measurable by laboratory instruments, the much higher photon flux available at synchrotron radiation sources and the availability of new position-sensitive area detectors (with small pixel size, high area and fast read-out/erasing dead-times) permit a considerable expansion of the related research areas, making time-resolved diffraction studies possible, with a potential time resolution on the ms timescale in conventional (not pump-and-probe) schemes. This allows moderately slowly-evolving chemical reactions [64,[273][274][275][276][277][278][279][280][281][282][283][284][285][286], solid state phase transitions [247,287], in situ crystallization, re-crystallization processes [288][289][290][291], dynamics in biological systems [292] etc..., to be investigated with high accuracy XRPD. Some of the experimental setups employed for these studies were conceived for the simultaneous XRPD/XAS (Sections 2.5) data collection [274, 275, 277-279, 281-283, 293].…”

Multichannel detector–collimator for powder diffraction measurements at energy scanning x-ray absorption spectroscopy synchrotron radiation beamlines for high-pressure and high-temperature applications

“…These include the adoption of a standard angular scanning setup or the usage of various forms of position sensitive detectors. [3][4][5][6][7] These latter techniques are usually suitable for fast data acquisition with low resolution. In order to improve resolution and to eliminate the scattering from the sample container some form of collimator has to be included.…”