NaWMn/SiO2 Mixed Oxide Catalyst: Thermochemistry of Lattice Oxygen | Sciact - CRIS-system of Boreskov Institute of Catalysis

NaWMn/SiO2 Mixed Oxide Catalyst: Thermochemistry of Lattice Oxygen Conference Abstracts

Conference

EuropaCat-XIII: 13th European Congress on Catalysis
27-31 Aug 2017 , Florence

Source

13th European Congress on Catalysis
Compilation, 2017.

Output data

Year: 2017, Article number : P1.259, Pages count : 2

Authors

Lomonosov V.I. ¹ , Gordienko Yu.A. ¹ , Fattakhova Z.T. ¹ , Sinev M.Yu. ¹ , Rogov V.A. ² , Sadykov V.A. ²

Affiliations

1	Semenov institute of chemical physics RAS, Moscow, 119991, Russia
2	Novosibirsk state university, Novosibirsk,630090, Russia

The in-situ differential scanning calorimetry (DSC) was employed to determine quantitative characteristics of active lattice oxygen in NaWMn/SiO2 mixed oxide catalyst. The amount of 'weakly-bonded' oxygen (~56 mmole/g) and its binding energy with oxide lattice (~340 kJ/mole) were determined by re-oxidation of the sample after preliminary oxygen desorption. The obtained values indicate that this type of oxygen adsorption/removal is associated with Mn(4+) <=> Mn(3+) transition. The amount of 'strongly-bonded' oxygen (~443 mmole/g) and its binding energy (~420 kJ/mole) were determined by re-oxidation of the sample pre-reduced in hydrogen. They suggest that this form of active oxygen can be associated with tungsten present in the sample.

Lomonosov V.I. , Gordienko Y.A. , Fattakhova Z.T. , Sinev M.Y. , Rogov V.A. , Sadykov V.A.
NaWMn/SiO2 Mixed Oxide Catalyst: Thermochemistry of Lattice Oxygen
In compilation 13th European Congress on Catalysis. 2017.

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