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Infrared reflective

IRRAS Infrared reflection- Grazing-incidence polarized Enhanced sensitivity... [Pg.317]

Vibrational Spectroscopy. Infrared absorption spectra may be obtained using convention IR or FTIR instrumentation the catalyst may be present as a compressed disk, allowing transmission spectroscopy. If the surface area is high, there can be enough chemisorbed species for their spectra to be recorded. This approach is widely used to follow actual catalyzed reactions see, for example. Refs. 26 (metal oxide catalysts) and 27 (zeolitic catalysts). Diffuse reflectance infrared reflection spectroscopy (DRIFT S) may be used on films [e.g.. Ref. 28—Si02 films on Mo(llO)]. Laser Raman spectroscopy (e.g.. Refs. 29, 30) and infrared emission spectroscopy may give greater detail [31]. [Pg.689]

Szanyi J, Kuhn W K and Goodman D W 1994 CO oxidation on palladium 2. A combined kinetic-infrared reflection absorption spectroscopic study of Pd(IOO) J. Phys. Chem. 98 2978... [Pg.955]

A number of new technology promotion options are being explored in the lighting area. Work is undeiway on market transformation programs based on bulk procurement for improved efficacy incandescent light bulbs and for compact fluorescent lamps and fixtures. For incandescent lamps, adaptations of the infrared reflective lamp coating that is already in use on reflector bulbs are encouraged by the EPAct requirement. [Pg.81]

Dale, J.M., Klatt, L.N., "Principal Component Analysis of diffuse Near-Infrared Reflectance Data From Paper Currency", / /)/. Spec. 1989 (43) 1399-1405. [Pg.193]

Mark, H., "Normalized distances for Qualitative Near-Infrared Reflectance Analysis", Anal. Chem. 1986 (58) 379-384. [Pg.195]

In situ Fourier transform infrared and in situ infrared reflection spectroscopies have been used to study the electrical double layer structure and adsorption of various species at low-index single-crystal faces of Au, Pt, and other electrodes.206"210 It has been shown that if the ions in the solution have vibrational bands, it is possible to relate their excess density to the experimentally observed surface. [Pg.41]

KJ. Uram, L. Ng, and J.R.Yates Jr., Electrostatic effects between adsorbed species-The K-CO interaction on Ni(lll) as studied by infrared reflection - absorption spectroscopy, Surf. Sci. 177, 253-277 (1986). [Pg.85]

Coatings for photothermal solar converters with high infrared reflectance, which use Reaction (3) and a 1000°C anneal,... [Pg.158]

Lucovsky G, White RM, Benda JA, ReveUi JE (1973) Infrared-reflectance spectra of layered Group-IV and Group-VI transition-metal dichalcogenides. Phys Rev B 7 3859-3870 Cordes H, Schmid-Fetzer R (1994) Phase equilibria in the U-Te system. J AUoy Compd 216 197-206... [Pg.55]

Tkachuk, R. et ah. Determination of chlorophyll in ground rapeseed using a modified near infrared reflectance spectrophotometer, J. Am. Oil Chm. Soc., 65, 381, 1988. [Pg.446]

Recent work in our laboratory has shown that Fourier Transform Infrared Reflection Absorption Spectroscopy (FT-IRRAS) can be used routinely to measure vibrational spectra of a monolayer on a low area metal surface. To achieve sensitivity and resolution, a pseudo-double beam, polarization modulation technique was integrated into the FT-IR experiment. We have shown applicability of FT-IRRAS to spectral measurements of surface adsorbates in the presence of a surrounding infrared absorbing gas or liquid as well as measurements in the UHV. We now show progress toward situ measurement of thermal and hydration induced conformational changes of adsorbate structure. The design of the cell and some preliminary measurements will be discussed. [Pg.435]

Reaction products can also be identified by in situ infrared reflectance spectroscopy (Fourier transform infrared reflectance spectroscopy, FTIRS) used as single potential alteration infrared reflectance spectroscopy (SPAIRS). This method is suitable not only for obtaining information on adsorbed products (see below), but also for observing infrared (IR) absorption bands due to the products immediately after their formation in the vicinity of the electrode surface. It is thus easy to follow the production of CO2 versus the oxidation potential and to compare the behavior of different electrocatalysts. [Pg.76]

It is only since 1980 that in situ spectroscopic techniques have been developed to obtain identification of the adsorbed intermediates and hence of reliable reaction mechanisms. These new infrared spectroscopic in situ techniques, such as electrochemically modulated infrared reflectance spectroscopy (EMIRS), which uses a dispersive spectrometer, Fourier transform infrared reflectance spectroscopy, or a subtractively normalized interfacial Fourier transform infrared reflectance spectroscopy (SNIFTIRS), have provided definitive proof for the presence of strongly adsorbed species (mainly adsorbed carbon monoxide) acting as catalytic poisons. " " Even though this chapter is not devoted to the description of in situ infrared techniques, it is useful to briefly note the advantages and limitations of such spectroscopic methods. [Pg.76]

The different species formed by steps (18) to (20) or (18 ) to (20 ) have been detected by in situ infrared reflectance spectroscopy, and such dissociative steps are now widely accepted even if the exact nature of the species formed during (20) or (20 ) is still a subject of discussion. Several groups proposed the species (COH)3js as the main, strongly adsorbed species on the platinum surface, even though no absorption infrared band can be definitely attributed to (COH),, . However, the formyl-like species ( CHO), , . has been formally identified, since it gives an IR absorption band ataroimd 1690cm . ... [Pg.79]

The different kinds of adsorbed CO were observed by in situ infrared reflectance spectroscopy. The results showed that using bulk Pt-Ru alloys, the adsorbed CO species formed by dissociation of methanol, or from dissolved CO on the surface of the electrode, are different on R and on Ru. The adsorption of CO occurs on pure Pt and Ru and on alloys of different compositions, but a shift detected in the wave number of the... [Pg.90]

These conclusions from the infrared reflectance spectra recorded with Pt and Pt-Ru bulk alloys were confirmed in electrocatalysis studies on small bimetallic particles dispersed on high surface area carbon powders.Concerning the structure of bimetallic Pt-Ru particles, in situ Extended X-Ray Absorption Fine Structure (EXAFS>XANES experiments showed that the particle is a true alloy. For practical application, it is very important to determine the optimum composition of the R-Ru alloys. Even if there are still some discrepancies, several recent studies have concluded that an optimum composition about 15 to 20 at.% in ruthenium gives the best results for the oxidation of methanol. This composition is different from that for the oxidation of dissolved CO (about 50 at.% Ru), confirming a different spatial distribution of the adsorbed species. [Pg.91]

Westermark, G. and Persson, 1. (1998) Chemisorption of tertiary phosphines on coinage and platinum group metal powders. An infrared reflectance absorption spectroscopic, enhanced Raman spectroscopic and surface coverage study. Colloids and Surfaces A -Physicochemical and Engineering Aspects, 144, 149-166. [Pg.356]

EMIRS electrochemically modulated infrared reflectance spectroscopy... [Pg.467]

In the early work of Bewick and Robinson (1975), a simple monochromator system was used. This is called a dispersive spectrometer. In the experiment the electrode potential was modulated between two potentials, one where the adsorbed species was present and the other where it was absent. Because of the thin electrolyte layer, the modulation frequency is limited to a few hertz. This technique is referred to as electrochemically modulated infrared reflectance spectroscopy (EMIRS). The main problem with this technique is that data acquisition time is long. So it is possible for changes to occur on the electrode surface. [Pg.504]


See other pages where Infrared reflective is mentioned: [Pg.938]    [Pg.513]    [Pg.663]    [Pg.268]    [Pg.269]    [Pg.288]    [Pg.68]    [Pg.394]    [Pg.145]    [Pg.456]    [Pg.767]    [Pg.5]    [Pg.251]    [Pg.481]    [Pg.602]    [Pg.472]    [Pg.282]    [Pg.392]    [Pg.436]    [Pg.89]    [Pg.44]    [Pg.467]    [Pg.505]   
See also in sourсe #XX -- [ Pg.50 ]




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Amine desorption, variable-temperature diffuse reflectance Fourier transform infrared

Applications of Near-Infrared Diffuse Reflection Spectrometry

Aqueous layer infrared reflection-absorption

Attenuated Total Infrared Internal Reflectance (ATR) Spectroscopy (Spectra-Tech)

Attenuated Total Reflection Infrared Spectrometry (ATR)

Attenuated total internal reflection infrared

Attenuated total internal reflection infrared spectroscopy

Attenuated total reflectance Fourier transform infrared

Attenuated total reflectance Fourier transform-infrared spectroscopy

Attenuated total reflectance Fourier transformation infrared spectroscopy

Attenuated total reflectance Fourier transformed infrared spectroscopy

Attenuated total reflectance Fourier-transformation infrared

Attenuated total reflectance fourier transform infrared spectrometry

Attenuated total reflectance infrared

Attenuated total reflectance infrared absorption

Attenuated total reflectance infrared spectra

Attenuated total reflectance infrared spectrometry

Attenuated total reflectance infrared spectroscopy

Attenuated total reflectance infrared surface species, study

Attenuated total reflectance mid-infrared

Attenuated total reflectance surface-enhanced infrared absorption spectroscopy

Attenuated total reflection Fourier transform infrared

Attenuated total reflection Fourier transform infrared spectroscopy , polymer

Attenuated total reflection infrared

Attenuated total reflection infrared spectroscopy

Attenuated total reflection-Fourier transform infrared spectrometer

Attenuated total reflection-Fourier transform infrared spectroscopy

Attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR

Cylindrical internal reflectance Fourier transform infrared spectroscopy

DRIFT (diffuse reflectance infrared

DRIFTS (diffuse reflectance infrared Fourier

DRIFTS (diffuse reflectance infrared Fourier transform

DRIFTS reflection infrared

Diffuse Reflection Infrared Fourier Transform spectra

Diffuse reflectance Fourier transform DRIFT) infrared spectrometry

Diffuse reflectance Fourier transform infrared substrate studies

Diffuse reflectance Fourier-transform infrared spectrometry

Diffuse reflectance infrared Fourier

Diffuse reflectance infrared Fourier sorption

Diffuse reflectance infrared Fourier transform DRIFT) studies

Diffuse reflectance infrared Fourier transform difference

Diffuse reflectance infrared Fourier transform reaction

Diffuse reflectance infrared Fourier transform spectra

Diffuse reflectance infrared Fourier transform spectroscopic

Diffuse reflectance infrared Fourier transform spectroscopy

Diffuse reflectance infrared Fourier-transform

Diffuse reflectance infrared Fourier-transform program

Diffuse reflectance infrared Fourier-transform spectroscopy, DRIFTS

Diffuse reflectance infrared fourier analyses

Diffuse reflectance infrared spectra

Diffuse reflectance infrared spectra vibrations

Diffuse reflectance infrared spectroscop

Diffuse reflectance infrared spectroscopy DRIFT)

Diffuse reflectance near-infrared spectra

Diffuse reflectance, infrared

Diffuse reflection infrared

Diffuse reflection infrared Fourier

Diffuse reflection infrared spectroscop

Diffuse reflection infrared spectroscopy

Diffuse-reflection Fourier-transform infrared

Diffuse-reflection Fourier-transform infrared spectroscopy

Diffusion reflectance infrared Fourier

Electrochemically modulated infrared reflectance spectroscopy

External reflection infrared spectroscopy

Far infrared reflectivity

Fourier transform infrared reflection

Fourier transform infrared reflection absorption spectroscopy

Fourier transform infrared reflection coating

Fourier transform infrared spectroscopy total reflection

Fourier transform infrared-reflectance transmission

Fourier transform infrared-reflectance transmission measurement

Fourier transform infrared-reflectance transmission microscopy

High-pressure diffuse reflectance infrared

IRAS = infrared reflection-absorption spectroscopy

IRRAS (infrared reflection-absorption

IRRAS, IRAS (infrared reflection-absorption

In situ attenuated total reflectance infrared

In situ attenuated total reflectance infrared spectroscopy

In situ diffuse reflectance infrared Fourier

In situ diffuse reflectance infrared Fourier transform spectroscopy

Infrared (continued reflection

Infrared Reflecting Complex Inorganic Colored Pigments

Infrared Reflection Absorption Spectroscopy of Monolayers at the Air-Water Interface

Infrared Reflectivity of Mouse Atheromas A Case Study

Infrared Spectroscopy internal reflectance

Infrared absorbance reflection

Infrared external reflection

Infrared external reflection-absorption

Infrared internal reflectance

Infrared internal reflection

Infrared radiation reflection spectrometry

Infrared reflectance

Infrared reflectance absorbance

Infrared reflectance sensors

Infrared reflectance spectra

Infrared reflectance spectroscopy

Infrared reflectance spectrum, reduced

Infrared reflectance-absorption

Infrared reflectance-absorption experimental methods

Infrared reflectance-absorption spectroscopy

Infrared reflection

Infrared reflection absorption spectroscop

Infrared reflection absorption spectroscopic studies

Infrared reflection absorption spectroscopy PM-IRRAS)

Infrared reflection adsorption spectroscopy

Infrared reflection adsorption spectroscopy IRRAS)

Infrared reflection mode

Infrared reflection nebulae

Infrared reflection techniques

Infrared reflection-absorption measurement

Infrared reflection-absorption spectrometry

Infrared reflection-absorption spectroscopy

Infrared reflection-absorption spectroscopy IRRAS

Infrared spectrophotometry attenuated total reflectance

Infrared spectroscopy attenuated total reflectance Fourier

Infrared spectroscopy attenuated total reflection technique

Infrared spectroscopy diffuse reflectance

Infrared spectroscopy multiple internal reflection technique

Infrared spectroscopy reflectance measurements

Infrared spectroscopy reflection techniques

Infrared spectroscopy specular reflectance

Infrared spectroscopy specular reflection

Infrared spectroscopy total internal reflection cell

Internal Reflection Infrared Spectroscopy

Internal reflection infrared spectroscop

Multilayer enhanced infrared reflection

Near infrared reflectance spectroscop

Near infrared reflectance spectroscopy

Near infrared reflection spectrum

Near-infrared diffuse reflectance spectroscopy

Near-infrared diffuse reflectance spectroscopy NIRS)

Near-infrared diffuse reflection

Near-infrared diffuse reflection spectroscopy

Near-infrared reflectance

Near-infrared reflectance analysis

Near-infrared reflectance analysis NIRA)

Near-infrared reflectance spectroscopy NIRS)

Near-infrared spectroscopy diffuse reflectance mode

Optical Components Used in Infrared Spectrometers Specially Designed for External Reflectance Spectroscopy

Photon reflection-absorption infrared

Polarization modulated Fourier transform infrared reflection absorption

Polarization modulated infrared reflection absorption spectroscopy

Polarization modulation infrared reflection absorption spectroscopy

Polarization-Modulation Infrared Reflection-Absorption Spectroscopy (PM-IRRAS)

Polarization-modulation infrared reflection

Polarization-modulation infrared reflection-absorption

Polarized attenuated total reflection infrared spectroscopy

Polarized infrared reflectance spectra

RAIR (reflection-absorption infrared

RAIRS (reflection-absorption infrared

RAIRS, reflection adsorption infrared spectroscopy

Real time infrared reflectance-absorbance

Reflectance-absorbance infrared spectroscopy

Reflection absorption infrared spectroscopy RAIRS)

Reflection angle infrared spectroscopy

Reflection infrared drying

Reflection infrared spectra

Reflection infrared spectra analysis

Reflection infrared spectra measurements

Reflection infrared spectroscopy

Reflection-absorption infrared

Reflection-absorption infrared spectra

Reflection-absorption infrared spectra RAIR)

Reflection-absorption infrared spectrometry RAIRS)

Reflection-absorption infrared spectroscopy RAIR)

Reflectivity, infrared drying

Siliceous, variable-temperature diffuse reflectance Fourier transform infrared

Single Potential Infrared Reflectance Spectroscopy

Soils diffuse reflectance infrared Fourier

Subtractively normalized interfacial Fourier-transform infrared reflection

Surface Reflectance Infrared Spectroscopy (SRIRS)

Surface enhanced infrared reflection spectrometry

Surface reflectance infrared spectroscopy

Surface vibrational spectroscopy reflection-absorption infrared spectra

Variable-temperature diffuse reflectance Fourier transform infrared

Vibrational spectroscopy diffuse-reflection Fourier-transform infrared

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