Adsorption behavior of salicylic, benzoic, and 2-methyl-2-hexenoic acid on alumina: an in situ modulation excitation PM-IRRAS study

2009 ◽  
Vol 11 (43) ◽  
pp. 10132 ◽  
Author(s):  
Daniel M. Meier ◽  
Atsushi Urakawa ◽  
Alfons Baiker
Keyword(s):  
Adsorption Behavior ◽  
Modulation Excitation

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.

scholarly journals Characterizing Complex Gas–Solid Interfaces with in Situ Spectroscopy: Oxygen Adsorption Behavior on Fe–N–C Catalysts

2020 ◽  
Vol 124 (30) ◽  
pp. 16529-16543
Author(s):  
Michael J. Dzara ◽  
Kateryna Artyushkova ◽  
Moulay Tahar Sougrati ◽  
Chilan Ngo ◽  
Margaret A. Fitzgerald ◽  
...  
Keyword(s):  
Oxygen Adsorption ◽  
Adsorption Behavior ◽  
In Situ Spectroscopy

In situ DRIFTS study of NOx adsorption behavior on Ba/CeO2 catalysts

2013 ◽  
Vol 31 (11) ◽  
pp. 1074-1080 ◽  
Author(s):  
Lei WANG ◽  
Rui RAN ◽  
Xiaodong WU ◽  
Min LI ◽  
Duan WENG
Keyword(s):  
Adsorption Behavior ◽  
In Situ Drifts ◽  
Nox Adsorption

CO Adsorption Behavior of Cu/SiO2, Co/SiO2, and CuCo/SiO2 Catalysts Studied by in Situ DRIFTS

2012 ◽  
Vol 116 (14) ◽  
pp. 7931-7939 ◽  
Author(s):  
Miranda L. Smith ◽  
Nitin Kumar ◽  
James J. Spivey
Keyword(s):  
Co Adsorption ◽  
Adsorption Behavior ◽  
In Situ Drifts
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