X-Ray Techniques in Catalysis

Gallezot, P.

doi:10.1007/978-3-642-93247-2_4

Cited by 21 publications

(15 citation statements)

References 125 publications

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“…(197,201) Monochromatic x-rays are reflected from the sample with diffraction lines produced from the repetitive dimension of crystal planes, Each crystal type gives a characteristic pattern, so that the position of lines is a clue to the presence of a particular compound. Figure 7.2 shows typical results for alumina catalysts.…”

Section: Diffraction Methodsmentioning

confidence: 99%

Principles of Catalyst Development

Richardson¹

1989

Fundamental and Applied Catalysis

217

139

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Section: Diffraction Methodsmentioning

confidence: 99%

Principles of Catalyst Development

Richardson¹

1989

Fundamental and Applied Catalysis

217

139

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“…This method complements XAFS and other scattering methods in its sensitivity to particle size distributions and morphological change (see for instance [159]) and these days it may be operated in operando and on sub-second timescales. That this method could indeed be used to considerable effect has also been demonstrated in a 2012 GISAXS study of the behavior of Pt nanoparticles supported upon Mg(001) in the presence of CO at pressures in the range 10 −6 -10 3 Pa [176].…”

Section: Saxs and Gisaxsmentioning

confidence: 99%

“…Indeed, from a time predating the advent of dedicated synchrotrons, certain insightful, not to say brave, souls were already trying to apply this method to the study of supported metal catalysts. (See, for instance, [159] and reference therein).…”

Section: Inmentioning

confidence: 99%

Time Resolved Operando X-ray Techniques in Catalysis, a Case Study: CO Oxidation by O2 over Pt Surfaces and Alumina Supported Pt Catalysts

Newton

2017

Catalysts

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Abstract:The catalytic oxidation of CO by O 2 to form CO 2 over Pt surfaces and supported catalysts is one of the most studied catalytic reactions from both fundamental and applied points of view. This review aims to show how the application of a range of time resolved, X-ray based techniques, such as X-ray diffraction (XRD), Surface X-ray diffraction (SXRD), total X-ray scattering/pair distribution function (PDF), X-ray absorption (XAFS), X-ray emission (XES), and X-ray photoelectron spectroscopies (XPS), applied under operando conditions and often coupled to adjunct techniques (for instance mass spectrometry (MS) and infrared spectroscopy (IR)) have shed new light on the structures and mechanisms at work in this most studied of systems. The aim of this review is therefore to demonstrate how a fusion of the operando philosophy with the ever augmenting capacities of modern synchrotron sources can lead to new insight and catalytic possibilities, even in the case of a process that has been intensely studied for almost 100 years.

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“…One area where further advances could therefore be made is in designing a low-volume DRIFTS cell that permits a much larger solid angle for X-ray detection to be attained. This would allow a wider range (to lower energies) of X-ray energies to be used for the diffraction component of the combined experiment but also bring with it the possibility of combining total X-ray scattering methods [with the associated pair-distribution-function (PDF) measurements of analysis (Gallezot et al, 1984;Ferri et al, 2010;Egami & Billinge, 2003;Petkov, 2008)] with DRIFTS.…”

Section: Drifts/transmission X-ray Experiments For Catalysismentioning

confidence: 99%

IR and X-ray time-resolved simultaneous experiments: an opportunity to investigate the dynamics of complex systems and non-equilibrium phenomena using third-generation synchrotron radiation sources

Marcelli

Innocenzi

Malfatti

et al. 2012

J Synchrotron Radiat

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Third-generation storage rings are modern facilities working with high currents and designed to host powerful radiation sources, like undulators and wigglers, and to deliver high-brilliance beams to users. Many experiments at high spatial resolution, such as spectromicroscopy at the nanometre scale and with high temporal resolution to investigate kinetics down to the picosecond regime, are now possible. The next frontier is certainly the combination of different methods in a unique set-up with the ultimate available spatial and temporal resolutions. In the last decade much synchrotron-based research has exploited the advantage of complementary information provided by time-resolved X-ray techniques and optical methods in the UV/Vis and IR domains. New time-resolved and concurrent approaches are necessary to characterize complex systems where physical-chemical phenomena occur under the same experimental conditions, for example to detect kinetic intermediates via complementary but independent observations. In this contribution we present scientific cases from original works and literature reviews to support the proposed IR/X-ray simultaneous approach, with both probes exploiting synchrotron radiation sources. In addition, simple experimental layouts that may take advantage of the high brilliance and the wide spectral distribution of the synchrotron radiation emission will be given for specific researches or applications to investigate dynamic processes and non-equilibrium phenomena occurring in many condensed matter and biological systems, of great interest for both fundamental research and technological applications.

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X-Ray Techniques in Catalysis

Cited by 21 publications

References 125 publications

Principles of Catalyst Development

Principles of Catalyst Development

Time Resolved Operando X-ray Techniques in Catalysis, a Case Study: CO Oxidation by O2 over Pt Surfaces and Alumina Supported Pt Catalysts

IR and X-ray time-resolved simultaneous experiments: an opportunity to investigate the dynamics of complex systems and non-equilibrium phenomena using third-generation synchrotron radiation sources

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