Phase-sensitive detection for polarization-selective femtosecond Raman spectroscopy

2000 ◽  
Author(s):  
M. Khalil ◽  
O. Golonzka ◽  
N. Demirdöven ◽  
A. Tokmakoff
Keyword(s):  
Raman Spectroscopy ◽  
Sensitive Detection ◽  
Phase Sensitive ◽  
Phase Sensitive Detection

A Phase-Sensitive Detection Method Using Diffractive Optics for Polarization-Selective Femtosecond Raman Spectroscopy

2000 ◽  
Vol 104 (24) ◽  
pp. 5711-5715 ◽  
Author(s):  
M. Khalil ◽  
N. Demirdöven ◽  
Oleg Golonzka ◽  
C. J. Fecko ◽  
A. Tokmakoff
Keyword(s):  
Raman Spectroscopy ◽  
Detection Method ◽  
Diffractive Optics ◽  
Sensitive Detection ◽  
Phase Sensitive ◽  
Phase Sensitive Detection

Studies of Gaseous Flame Combustion Products by Raman Spectroscopy

1974 ◽  
Vol 28 (6) ◽  
pp. 554-557 ◽  
Author(s):  
William M. Arden ◽  
Tomas B. Hirschfeld ◽  
Stanley M. Klainer ◽  
William A. Mueller
Keyword(s):  
Raman Spectroscopy ◽  
Combustion Products ◽  
Sensitive Detection ◽  
Laser Raman Spectroscopy ◽  
Flame Combustion ◽  
Laser Raman ◽  
Phase Sensitive ◽  
Phase Sensitive Detection

Combustion products from various hydrocarbon-oxygen flames have been examined in the laboratory using the techniques of laser Raman spectroscopy and phase-sensitive detection. Instrumentation, techniques, and spectral results are described.

Four-element fiber grating sensor array with phase-sensitive detection

1994 ◽  
Author(s):  
R. Stephen Weis ◽  
Alan D. Kersey ◽  
Timothy A. Berkoff
Keyword(s):  
Sensor Array ◽  
Sensitive Detection ◽  
Fiber Grating ◽  
Fiber Grating Sensor ◽  
Phase Sensitive ◽  
Phase Sensitive Detection

scholarly journals CO2 Methanation over Rh/CeO2 Studied with Infrared Modulation Excitation Spectroscopy and Phase Sensitive Detection

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 601
Author(s):  
Felix Hemmingsson ◽  
Andreas Schaefer ◽  
Magnus Skoglundh ◽  
Per-Anders Carlsson
Keyword(s):  
Reaction Pathway ◽  
Sensitive Detection ◽  
Side Reactions ◽  
Co2 Methanation ◽  
Individual Contributions ◽  
Phase Sensitive ◽  
Phase Sensitive Detection ◽  
Modulation Excitation Spectroscopy ◽  
Modulation Excitation

Methane is a well-established fuel molecule whose production from CO 2 through methanation garners increasing interest as an energy storage solution. While often produced with Ni based catalysts, other metals are of interest thanks to higher robustness and activity-selectivity numbers. The Rh/CeO 2 catalyst has shown appreciable properties for CO 2 methanation and its structural dynamics has been studied in situ. However, the reaction pathway is unknown. Here, we present infrared modulation excitation spectroscopy measurements with phase sensitive detection of a Rh/CeO 2 catalyst adsorbate composition during H 2 pulsing (0–2 vol.%) to a constant CO 2 (0.5 vol.%) feed. Various carbonyl (CO) and carbonate (b-CO 3 /p-CO 3 ) ad-species clearly respond to the hydrogen stimulus, making them potential reaction intermediates. The different CO ad-species are likely intermediates for product CO and CH 4 but their individual contributions to the respective formations are not unambiguously ascertained. As for the carbonate dynamics, it might be linked to the reduction/oxidation of the CeO 2 surface upon H 2 pulsing. Formate (HCOO) ad-species are clearly visible but appear to be, if not spectators, linked to slow side reactions possibly also affected by CeO 2 redox processes.

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