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.

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

In-Situ DRIFT Study of Au–Ir/Ceria Catalysts: Activity and Stability for CO Oxidation

2015 ◽  
Vol 59 (2-4) ◽  
pp. 347-356 ◽  
Author(s):  
Alejo Aguirre ◽  
Celina E. Barrios ◽  
Antonio Aguilar-Tapia ◽  
Rodolfo Zanella ◽  
Miguel A. Baltanás ◽  
...  
Keyword(s):  
Co Oxidation ◽  
In Situ Drift ◽  
Ceria Catalysts

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.

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