Effects of CeO2 support facets on VOx/CeO2 catalysts in oxidative dehydrogenation of methanol

Effect of Oxygen Defects on the Catalytic Performance of VOx/CeO2 Catalysts for Oxidative Dehydrogenation of Methanol

“…12 Similarly, a recent research conducted by Wu et al on VO x /CeO 2 rod and octahedra shows that the VO x /CeO 2 nanorods with both (110) and (100) facets possess more oxygen vacancies and exhibit lower apparent activation energies for selective oxidation of iso-butane. 13 However, variations in the size of well-defined ceria nanoparticles and their correlation with oxygen vacancies, and subsequently their effects on the catalytic properties of supported VO x catalysts have not been systematically studied, mainly obscured by some unknown intrinsic differences in the nature of various supports, and surface structure differences for different facets of the same support material (i.e.…”

“…The prepared CeO 2 nanocubes were denoted as CeO 2 -C-68, CeO 2 -C-34 and CeO 2 -C-25 respectively, where numbers represent the average size of corresponding CeO 2 nanocube supports based on TEM observation. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 12,16 The vanadia catalysts supported on different CeO 2 nanocube supports are denoted as 5V-C-68, 5V-C-34 and 5V-C-25, respectively. Detailed vanadia loading and V density for the three catalysts are shown in Table 2.…”

Nanoshaped CuO/CeO2 Materials: Effect of the Exposed Ceria Surfaces on Catalytic Activity in N2O Decomposition Reaction

“…[4][5][6][7] Tailored CeO 2 nanomorphology such as cubes or rods can result in drastic improvement of CeO 2 -mediated catalytic performance in reactions where redox property of a catalyst is crucial, compared to randomly shaped CeO 2 crystallites. [8][9][10][11] This manifests itself through different selectivity or improved activity, which enables the catalyst to be operated at lower temperatures. Numerous theoretical [12][13][14] and experimental [8][9][10][11][15][16][17][18][19][20][21] investigations have revealed that nanoshaped CeO 2 (nanocubes and nanorods) with well-defined {100} and {110} reactive planes show higher catalytic activity than conventional and thermodynamically more stable polyhedral CeO 2 nanoparticles.…”

A self-redox pure-phase M1 MoVNbTeO /CeO2 nanocomposite as a highly active catalyst for oxidative dehydrogenation of ethane

“…CeO 2 itself is an excellent oxygen storage material due to its unique redox properties [47]. Moreover, CeO 2 is a catalyst with low activity and selectivity in the ODHE reaction at a temperature lower than 500°C [48,49]. We utilized CeO 2 as an oxidant in the pure-phase M1 catalyst on the nanoscale to increase the oxidative state of active sites (i.e., V 5+ abundance) on the catalyst surface with the aim of catalytic performance improvement.…”