Well-defined surface tungstenocarbyne complex through the reaction of [W(CtBu)(CH2tBu)3] with CeO2: a highly stable precatalyst for NOx reduction with NH3

Larabi, Cherif; Chen, Cuirong; Merle, Nicolas; Charlin, Marc O.; Szeto, Kaï C.; Mallmann, Aimery De; Benayad, Anass; Meziane, Karima B.; Kaddouri, A.; Nguyen, Hai P.; Taoufik, Mostafa

doi:10.1039/d0nj02146f

Cited by 5 publications

(3 citation statements)

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“…In the O 1s spectra, the estimated relative amounts of Oα were 34, 30 and 20% for CeO2, HPW/CeO2 and CoPW/CeO2, respectively. The decrease in lattice oxygen on the surface of the catalysts may be attributed to its interaction with the supported tungsten, confirming the existence of oxygen vacancies suggested previously [43].…”

Section: Characterization Of the Catalystssupporting

confidence: 89%

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Catalytic Reduction of NOx With NH3 Over CeO2 and SiO2 Supported Tungstophosphoric Acid: Promoting Effects of Ceria Support and Cobalt Proton Substitute

et al. 2021

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Grafted tungstophosphoric acid (H3PW12O40/ HPW) is applied as a catalyst in the selective catalytic reduction of NOx with NH3 (NH3-SCR). The HPW/CeO2 catalyst has been found to be effective in the SCR reaction compared to HPW/SiO2. The cobalt-exchanged HPW/CeO2 improved NOx conversion, which reached 98% over a wide operating temperature window (280-500 °C). The better NOx performance of the CoPW/CeO2 catalyst is mainly due to the higher dispersion of tungsten on the CeO2 support, the formation of oxygen vacancies and the production of nitrogenous species. Incorporation of vanadium decreased the acidity of HPW, which reduced SCR activity on the HPVW/CeO2 catalyst.

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Section: Characterization Of the Catalystssupporting

confidence: 89%

“…s −1 . The catalysts turn out to be more active than other deNOx converters recently reported: commercial catalyst 5% V2O5-WO3/TiO2 [22], HPW/CeO2-500 (W = 50%) catalyst [22], and W(≡CtBu)(CH2tBu)3/CeO2 (W = 9%) precatalyst [43].…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Catalytic Reduction of NOx With NH3 Over CeO2 and SiO2 Supported Tungstophosphoric Acid: Promoting Effects of Ceria Support and Cobalt Proton Substitute

et al. 2021

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“…As one of the air pollutants, nitrogen oxides (NO x , including NO and NO 2 ) mainly come from fixed sources (such as thermal power plants) and mobile sources (such as automobiles), and show detrimental impacts on biological health and the ecological environment, such as respiratory disease and acid rain. 1–3 For this reason, researchers have been looking for effective methods to control NO x emissions. Some researchers have proposed the use of selective catalytic oxidation (SCO) technology to control NO x emissions.…”

Section: Introductionmentioning

confidence: 99%