Combined in situ X-ray absorption and diffuse reflectance infrared spectroscopy: An attractive tool for catalytic investigations

Marinković, Nebojša; Wang, Q.; Barrio, Laura; Khalid, Syed; Cooper, C.; Frenkel, Anatoly I.

doi:10.1016/j.nima.2010.11.079

Cited by 14 publications

(12 citation statements)

References 9 publications

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“…Operando Pd K-edge XAFS/DRIFTS/MS. Operando XAFS and DRIFTS measurements were conducted at SuperXAS X10DA, Swiss Light Source, Paul Scherrer Institute, using a previously reported Harrick DRIFTS cell [47][48][49] integrated with an Agilent Carey 680 FTIR spectrometer. A DaVinci arm accessory fitted with praying mantis optics was used to refocus the IR beam outside the FTIR spectrometer for positioning of the Harrick DRIFTS cell in the X-ray path.…”

Section: Methodsmentioning

confidence: 99%

Structural selectivity of supported Pd nanoparticles for catalytic NH3 oxidation resolved using combined operando spectroscopy

et al. 2019

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Section: Methodsmentioning

confidence: 99%

Structural selectivity of supported Pd nanoparticles for catalytic NH3 oxidation resolved using combined operando spectroscopy

et al. 2019

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“…They have been developed in the past two decades. 50,51 A review of applications of this technique to the studies of bimetallic nanoparticles will be given elsewhere in this themed issue. Thus, the principle of this application will not be repeated here.…”

Section: Ambient Pressure Techniques Studying Surface Chemistry Of Camentioning

confidence: 99%

Synthesis, catalysis, surface chemistry and structure of bimetallic nanocatalysts

2012

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Bimetallic catalysts are one of the main categories of metal catalysts due to the tunability of electronic and geometric structures through alloying a second metal. The integration of a second metal creates a vast number of possibilities for varying the surface structure and composition of metal catalysts toward designing new catalysts. It is well acknowledged that the surface composition, atomic arrangement, and electronic state of bimetallic catalysts could be different from those before a chemical reaction or catalysis based on ex situ studies. Thanks to advances in electron-based surface analytical techniques, the surface chemistry and structure of bimetallic nanoparticles can be characterized under reaction conditions and during catalysis using ambient pressure analytical techniques including ambient pressure XPS, ambient pressure STM, X-ray absorption spectroscopy and others. These ambient pressure studies revealed various restructurings in the composition and arrangement of atoms in the surface region of catalysts under reaction conditions or during catalysis compared to that before reaction. These restructurings are driven by thermodynamic and kinetic factors. The surface energy of the constituent metals and adsorption energy of reactant molecules or dissociated species on a metal component are two main factors from the point of view of thermodynamics. Correlations between the authentic surface structure and chemistry of catalysts during catalysis and simultaneous catalytic performance were built for understanding catalytic mechanisms of bimetallic catalysts toward designing new catalysts with high activity, selectivity, and durability.

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“…Time‐resolved multitechnique investigations of Mo38 and Fe39 based materials active in Fischer–Tropsch synthesis, zeotypes (SAPO‐34) in the methanol to olefin (MTO) process,40 ceria supported gold in nitrobenzene hydrogenation,41 VO x molecular entities in the oxidative dehydrogenation of propane,10 Ni 2 P supported phases under hydrodesulfurization conditions,7f as well as three‐way conversion (TWC) materials in HC (hydrocarbon), CO, and NO elimination reactions or relevant redox conditions have recently appeared in the literature 6b. e, 7b, 42…”

Section: Resultsmentioning

confidence: 99%

Surface and Bulk Approach to Time‐resolved Characterization of Heterogeneous Catalysts

et al. 2012

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The evolution of time‐resolved experiments, covering a multipurpose surface and bulk characterization of catalytic solids, during their preparation process and under reaction conditions, is presented. Particular emphasis is given to recent studies that attempt to unveil contemporary unresolved questions concerning the control of physicochemical properties of nanosolids, as well as the evolution of such solid materials under reactive atmospheres. To reach this goal, representative in situ and in operando works, using either modern (mostly synchrotron radiation based) approaches or multi‐technique methods (mainly, although not exclusively, X‐ray–vibrational coupling), and considering experiments in liquid and gas phase, as well as with amorphous, nanocrystalline and surface‐deposited materials, are reviewed.

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Combined in situ X-ray absorption and diffuse reflectance infrared spectroscopy: An attractive tool for catalytic investigations

Cited by 14 publications

References 9 publications

Structural selectivity of supported Pd nanoparticles for catalytic NH3 oxidation resolved using combined operando spectroscopy

Structural selectivity of supported Pd nanoparticles for catalytic NH3 oxidation resolved using combined operando spectroscopy

Synthesis, catalysis, surface chemistry and structure of bimetallic nanocatalysts

Surface and Bulk Approach to Time‐resolved Characterization of Heterogeneous Catalysts

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