By J. W. Niemantsverdriet
'Spectroscopy in Catalysis' describes an important glossy analytical concepts used to enquire catalytic surfaces. those comprise electron spectroscopy (XPS, UPS, AES, EELS), ion spectroscopy (SIMS, SNMS, RBS, LEIS), vibrational spectroscopy (infrared, Raman, EELS), temperature-programmed suggestions (TPR, TPO, TDS), diffraction (XRD, LEED, EXAFS), and microscopy (TEM, SEM, STEM, STM, AFM, FEM, and FIM). each one bankruptcy makes use of present functions to demonstrate the kind of info that the approach offers and evaluates its chances and barriers. This moment version comprises major new advancements, for instance scanning probe microscopies, the imaging and vibrational innovations were revised, the case experiences improved with an instance on polymerization catalysts, and the entire different chapters up-to-date with contemporary examples and correct new literature. From stories of the 1st version: 'This is a really beneficial publication ... very precious for business practitioners who must be conscious of the kind of info that may be bought from glossy floor spectroscopies .... The ebook has an exceptional pedagogic value...' magazine of Catalysis '... this is often a superb textual content on spectroscopies in catalysis and that i hugely suggest it for ... introductory classes on heterogeneous catalysis or as a common introductory monograph.' magazine of the yank Chemical Society
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Additional resources for Spectroscopy in Catalysis: An Introduction, 2nd Edition
1 and 25 K per second. The concentration of desorbing species is usually measured with a quadrupole mass spectrometer, but can also be determined with an ionization manometer or by monitoring the work function of the sample. Optimized geometries for TDS measurements have been described by Feulner and Menzel 115 ) . Pumping capacity is an important consideration in thermal desorption. The pumping speed should be sufficiently high to prevent readsorption of the desorbed species back onto the surface.
P. E. van Gennip Ultra High Vacuum Controller 1 / ~ wires Heat'ng L- Quadrupole Mass Analyzer 8- ~ Thermocouple 0. 10: Experimental set-up for thermal desorption studies in ultrahigh vacuum. The heat dissipated in the tantalum wires resistively heats the crystal; the temperature is measured by a thermocouple spot-welded to the back of the crystal. Desorption of gases is followed with a mass spectrometer desorption temperatures and should not be underestimated. For example, studies of H2 desorption in UHV systems pumped by turbo molecular pumps with their unfavorable compression factors for light gases will certainly suffer from readsorption features (actually, turbo - molecular drag combination pumps are better suitable for studies involving hydrogen).
59. H. Kung, Transition Metal Oxides: Surface Chemistry and Catalysis, Elsevier, Amsterdam, 1989. J. Wimniers, P. A. Moulijn, J. Phys. Chem. 90 (1986) 1331. E. Kissinger, Anal. Chem. 29 (1957) 1702. J. W. Niemantsverdriet, Appl. Catal. I0 (1984) 155. C. R. A. Schuit, Chemistry of Catalytic Processes, McGraw-Hill, New York, 1979. [ 121 P. M. D. A. Moulijn, J. Catal. 92 ( 1 985) 35. 1131 T. J. A. van Santen, J. Catal. 134 (1992) I . P. E. W. Niemantsverdriet, unpublished results. [ 151 P. Feulner and D.