Rutile vanadium antimonates: A new class of catalysts for selective reduction of NO with ammonia

Brazdil, James F.; Ebner, Ann M.; Cavalcanti, F.A.P.

doi:10.1016/s0926-860x(97)00191-9

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…Antimony is widely used as a key element in mixed oxide catalysts for selective oxidation of hydrocarbons, such as Fe−Sb−O, − Sn−Sb−O, − V−Sb−O, ,− Mo−Sb−O, − and Re−Sb−O. − Many studies on the mixed oxides except for Re−Sb−O have demonstrated that excess antimony at surfaces is a clue to high selectivity to partially oxidized products. Allen and Bowker investigated propene oxidation on FeSbO 4 catalysts and reported that the catalyst surfaces were covered by antimony rich thin layers under the selective oxidation conditions .…”

Section: Introductionmentioning

confidence: 99%

“…Antimony is widely used as a key element in mixed oxide catalysts for selective oxidation of hydrocarbons, such as Fe-Sb-O, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Sn-Sb-O, [17][18][19][20][21][22][23][24] V-Sb-O, 11,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] Mo-Sb-O, [40][41][42][43] and Re-Sb-O. [44][45][46][47][48] Many studies on the mixed oxides except for Re-Sb-O have demonstrated that excess antimony at surfaces is a clue to high selectivity to partially oxidized products.…”

Section: Introductionmentioning

confidence: 99%

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Reversible Structure Transformation of Antimony Oxides on SiO₂Relevant to Selective Catalytic Oxidation of Ethanol

2003

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Sb/SiO2 catalysts were prepared by chemical vapor deposition of Sb(OEt)3 on a SiO2 surface followed by water vapor admission and calcination. The catalysts were characterized by X-ray diffraction, X-ray photoelectron spectra, and X-ray absorption fine structure and by catalytic performance for selective oxidation of ethanol. At low loadings (2−4 wt %) Sb(OEt)3 reacted with surface OH groups on the SiO2 surface to form surface-attached Sb(III) species. At high Sb loadings (>5 wt %), in addition to the attached Sb(III) species, crystalline Sb2O3 species were formed after exposure to water vapor. The amount of crystalline Sb2O3 species increased with Sb loading, and 30−50% of Sb species existed as crystalline Sb2O3 at 7−12 wt %. Most of the Sb(III) species remained trivalent after calcination. On the other hand, the crystalline Sb2O3 was oxidized to Sb(V) and spread on the SiO2 surface. The spread antimony oxide species were active for selective catalytic oxidation of ethanol through a redox mechanism. When the spread antimony oxide species were reduced with ethanol, they were reversibly transformed to crystalline Sb2O3 species. This paper shows a dynamic structure change that occurs under the ethanol selective oxidation reaction conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reversible Structure Transformation of Antimony Oxides on SiO₂Relevant to Selective Catalytic Oxidation of Ethanol

2003

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“…26 It was mentioned in 27 that V 1 Sb 10 O x mixed oxide is active in the ODH of isobutane to isobutene.…”

Section: 22-24mentioning

confidence: 99%

Effect of Various Supports on the Catalytic Performance of V-Sb Oxides in the Oxidative Dehydrogenation of sobutane

Shamilov¹,

Vislovskiy²

2011

Journal of the Korean Chemical Society

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ABSTRACT. V0.9Sb0.1Ox systems, bulk and deposited on different supports (five types of γ-aluminas, α-alumina, silica-alumina, silica gel, magnesium oxide), have been tested in the oxidative dehydrogenation (ODH) of iso-butane. Catalytic performance of VSb oxides has shown to be highly dependent on the support and the nature of the support decreasing in a series: γ-Al2O3 > α-Al2O3 > Si-Al-O > SiO2 ≈ MgO >> unsupported. Variation of the V-Sb-O-loading in the studied range of coverage (0.5-2 theoretical monolayer) only slightly influences the catalysts' activity and selectivity. The best catalytic performance of γ-alumina-supported V0.9Sb0.1Ox systems can be explained by the optimal surface interaction between support and supported components resulting in the formation of well-spread amorphous active VOx-component with vanadium in a high oxidation state.

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The electrical n-p phase transition in the Sb0.92V0.92O4 and Sb2V2O9 compounds

et al. 2005

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Rutile vanadium antimonates: A new class of catalysts for selective reduction of NO with ammonia

Cited by 9 publications

References 7 publications

Reversible Structure Transformation of Antimony Oxides on SiO₂Relevant to Selective Catalytic Oxidation of Ethanol

Reversible Structure Transformation of Antimony Oxides on SiO₂Relevant to Selective Catalytic Oxidation of Ethanol

Effect of Various Supports on the Catalytic Performance of V-Sb Oxides in the Oxidative Dehydrogenation of sobutane

The electrical n-p phase transition in the Sb0.92V0.92O4 and Sb2V2O9 compounds

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Rutile vanadium antimonates: A new class of catalysts for selective reduction of NO with ammonia

Cited by 9 publications

References 7 publications

Reversible Structure Transformation of Antimony Oxides on SiO2Relevant to Selective Catalytic Oxidation of Ethanol

Reversible Structure Transformation of Antimony Oxides on SiO2Relevant to Selective Catalytic Oxidation of Ethanol

Effect of Various Supports on the Catalytic Performance of V-Sb Oxides in the Oxidative Dehydrogenation of sobutane

The electrical n-p phase transition in the Sb0.92V0.92O4 and Sb2V2O9 compounds

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Reversible Structure Transformation of Antimony Oxides on SiO₂Relevant to Selective Catalytic Oxidation of Ethanol

Reversible Structure Transformation of Antimony Oxides on SiO₂Relevant to Selective Catalytic Oxidation of Ethanol