scholarly journals Unraveling the Direct Decomposition of NOx over Keggin Heteropolyacids and Their Deactivation Using a Combination of Gas-IR/MS and In Situ DRIFT Spectroscopy

2020 ◽  
Vol 124 (41) ◽  
pp. 22459-22470
Author(s):  
Josefine Schnee ◽  
Laurent Delannoy ◽  
Guylène Costentin ◽  
Cyril Thomas
Keyword(s):  
Direct Decomposition ◽  
Drift Spectroscopy ◽  
Keggin Heteropolyacids ◽  
In Situ Drift

Steam reforming of ethanol over mesoporous Rh/CeZrO2: Mechanistic evaluation using in situ DRIFT spectroscopy

2016 ◽  
Vol 94 (4) ◽  
pp. 752-760 ◽  
Author(s):  
Pankaj Kumar Sharma ◽  
Navin Saxena ◽  
Vimlesh Kumar Bind ◽  
Prasun Kumar Roy ◽  
Arti Bhatt
Keyword(s):  
Steam Reforming ◽  
Drift Spectroscopy ◽  
Steam Reforming Of Ethanol ◽  
In Situ Drift

?In-situ? drift spectroscopy of intracavity chemistry of carbonyl complexes in zeolites

1988 ◽  
Vol 95 (1-6) ◽  
pp. 113-117 ◽  
Author(s):  
Eric Denneulin ◽  
Claude Br�mard ◽  
Christophe Depecker ◽  
Pierre Legrand
Keyword(s):  
Carbonyl Complexes ◽  
Drift Spectroscopy ◽  
In Situ Drift

scholarly journals Low Temperature HCHO Detection by SnO2/TiO2@Au and SnO2/TiO2@Pt: Understanding by in-situ DRIFT Spectroscopy

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2049
Author(s):  
Abulkosim Nasriddinov ◽  
Vadim Platonov ◽  
Alexey Garshev ◽  
Marina Rumyantseva
Keyword(s):  
Low Temperature ◽  
Chemical Precipitation ◽  
Surface Reactivity ◽  
Precipitation Method ◽  
Impregnation Method ◽  
Drift Spectroscopy ◽  
Au Nps ◽  
Sensor Properties ◽  
In Situ Drift

In this work we analyze the effectiveness of decoration of nanocrystalline SnO2/TiO2 composites with gold nanoparticles (Au NPs) and platinum nanoparticles (Pt NPs) in enhancing gas sensor properties in low-temperature HCHO detection. Nanocrystalline SnO2/TiO2 composites were synthesized by a chemical precipitation method with following modification with Pt and Au NPs by the impregnation method. The nanocomposites were characterized by TEM, XRD, Raman and FTIR spectroscopy, DRIFTS, XPS, TPR-H2 methods. In HCHO detection, the modification of SnO2 with TiO2 leads to a shift in the optimal temperature from 150 to 100 °C. Further modification of SnO2/TiO2 nanocomposites with Au NPs increases the sensor signal at T = 100 °C, while modification with Pt NPs gives rise to the appearance of sensor responses at T = 25 °C and 50 °C. At 200 °C nanocomposites exhibited high selectivity toward formaldehyde within the sub-ppm concentration range among different VOCs. The influence of Pt and Au NPs on surface reactivity of SnO2/TiO2 composite and enhancement of the sensor response toward HCHO was studied by DRIFT spectroscopy and explained by the chemical and electronic sensitization mechanisms.

In situ DRIFT spectroscopy insights into the reaction mechanism of CO and toluene co-oxidation over Pt-based catalysts

2019 ◽  
Vol 9 (17) ◽  
pp. 4538-4551 ◽  
Author(s):  
Qi Zhang ◽  
Shengpeng Mo ◽  
Jiaqi Li ◽  
Yuhai Sun ◽  
Mingyuan Zhang ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Co Oxidation ◽  
Drift Spectroscopy ◽  
Adsorption Sites ◽  
In Situ Drift

The Pt–CeO2 catalyst with adsorption sites and oxygen-rich vacancies exhibited outstanding activity towards CO and toluene co-oxidation.

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