Preparing MoVTeNbBiO Catalysts for the Selective Oxidative Conversion of Light Alkanes

Discerning the Metal Doping Effect on Surface Redox and Acidic Properties in a MoVTeNbOx for Propa(e)ne Oxidation

“…ratio (Cat-Te007Bi). The addition of Bi to the MoVTeNbO system was reported to produce a partial destruction of crystalline phase M1, 38 , 49 , 58 thus increasing the relative content of crystalline phase M2. For sample Cat-Te007Bi, the surface enrichment of Nb without an apparent destruction of crystalline phase M1 led to a notable formation of NbO x species.…”

“…This performance was the result of changes in catalyst’s surface acidic and redox properties by doping, while retaining the pristine crystalline structure; Bi addition did not lead to the destruction of phase M1 as found by others. 42 XPS showed the important role of doping in the amount of Mo, V, and Nb surface species and their oxidation states regarding the contribution of the pairs V 4+ /V 5+ and Mo 5+ /Mo 6+ and the concentration of NbO x species. The partial elimination of Brønsted acidity for K-doped catalyst appeared to have an important role in its enhanced acrylic acid selectivity.…”

“… 37 , 38 Lazareva et al. claimed that Bi addition increased MoVNbTeO x stability, maintaining its catalytic performance in ODHE 36 − 38 and propane oxidation to acrylic acid; 42 over a calcined MoVTeNbO x impregnated with a Bi-containing organic solution, an acrylic acid yield as high as 48% was achieved. Bi ion addition to MoVTeNbO x , nonetheless, led to a decrease in the amount of phase M1 from ca.…”

“…The addition of Bi ions in moderate amounts (Bi/Mo = 0.015–0.025), in contrast, increased both the catalyst’s activity and stability when operating at severe reducing conditions as this metal would incorporate into the six-membered channels of phase M1 hampering Te ion segregation and loss under severe reaction conditions. , Lazareva et al. claimed that Bi addition increased MoVNbTeO x stability, maintaining its catalytic performance in ODHE − and propane oxidation to acrylic acid; over a calcined MoVTeNbO x impregnated with a Bi-containing organic solution, an acrylic acid yield as high as 48% was achieved. Bi ion addition to MoVTeNbO x , nonetheless, led to a decrease in the amount of phase M1 from ca.…”

Kinetics of Oxidative Cracking of n‐Hexane to Light Olefins using Lattice Oxygen of a VOx/SrO‐γAl2O3 Catalyst

“…For alkane conversion to light olefins, vanadium‐based catalysts have been reported to achieve high alkane conversion and olefins selectivity in oxidative aided catalysis [8–11] . This is because vanadium possesses variable oxidation states ranging from V 4+ and V 5+ , which makes it an active component in several oxidative catalytic reactions.…”