Thermally and Chemically Induced Structural Transformations of Keggin-Type Heteropoly Acid Catalysts

[1]  Robert J. Davis,et al.  Characterization of copper and vanadium containing heteropolyacid catalysts for oxidative dehydrogenation of propane , 1999 .

[2]  U. Ozkan,et al.  Study of cesium or cesium-transition metal-substituted Keggin-type phosphomolybdic acid as isobutane oxidation catalysts. I. Structural characterization , 1999 .

[3]  T. Srinivasan,et al.  Raman Spectroscopy of Monolayer-Type Catalysts: Supported Molybdenum Oxides , 1998 .

[4]  R. Neumann,et al.  Oxidative dehydrogenation of 4-vinylcyclohexene to styrene catalyzed by PV2Mo10O5−40 heteropolyacids , 1998 .

[5]  N. Mizuno,et al.  Selective Oxidation of Ethane, Propane, and Isobutane Catalyzed by Copper-Containing Cs2.5H1.5PVMo11O40under Oxygen-Poor Conditions☆ , 1998 .

[6]  E. Beckmann,et al.  A new unifying structural model of heteropolymolybdate salts: microstructure and thermal stability of a series of molecular oxides , 1998 .

[7]  F. Cavani,et al.  Effect of Antimony on the Chemical–Physical Features and Reactivity in Isobutyric Acid Oxidehydrogenation of Keggin-Type Heteropolycompounds☆ , 1998 .

[8]  Wen Li,et al.  Catalytic selective oxidation of C2–C4 alkanes over reduced heteropolymolybdates* , 1997 .

[9]  D. Suh,et al.  Catalytic performance of Cs2.5Fe0.08H1.26PVMo11O40 for direct oxidation of lower alkanes , 1996 .

[10]  F. Cavani,et al.  Reactivity of Keggin-type heteropolycompounds in the oxidation of isobutane to methacrolein and methacrylic acid : Reaction mechanism , 1996 .

[11]  F. Liu,et al.  Catalysis of the oxidation of isobutyric acid by vanadyl, copper and mixed vanadyl-copper salts of H3[PMo12O40] and H4[PMo11VO40] , 1996 .

[12]  R. Schlögl,et al.  The mechanism of the synthesis in connection with assignments for a solid reaction cycle of the HPA catalyst during catalytic reactions , 1996 .

[13]  D. Suh,et al.  Selective oxidative dehydrogenation of propane at 380°C by Cs2.5Cu0.08H3.34PV3Mo9O40 catalyst precursor , 1996 .

[14]  N. Mizuno,et al.  Oxidation of Isobutane Catalyzed by CsxH3−xPMo12O40-Based Heteropoly Compounds , 1996 .

[15]  F. Cavani,et al.  The role of promoters in the oxidehydrogenation of ethane over structurally stable Keggin-type heteropolyoxomolybdates , 1996 .

[16]  F. Liu,et al.  ESR characterization of V4+ as a counter-ion of the 12-molybdophosphate. Influence of thermal treatments , 1996 .

[17]  A. Primavera,et al.  Thermal stability and catalytic properties of the Wells-Dawson K6P2W18O62·10H2O heteropoly compound in the oxidative dehydrogenation of isobutane to isobutene , 1996 .

[18]  J. Moisan,et al.  Oxidative dehydrogenation of isobutyric acid: Characterization and modeling of vanadium containing polyoxometalate catalysts , 1996 .

[19]  F. Cavani,et al.  Oxidative dehydrogenation of isobutane to isobutene : Dawson-type heteropolyoxoanions as stable and selective heterogeneous catalysts , 1996 .

[20]  M. Misono,et al.  Catalytic Chemistry of Heteropoly Compounds , 1996 .

[21]  W. Ueda,et al.  Catalytic oxidation of propane to acrylic acid with molecular oxygen activated over reduced heteropolymolybdates , 1996 .

[22]  T. Srinivasan,et al.  Mechanically Activated MoO3. 3. Characterization by Vibrational Spectroscopy , 1995 .

[23]  C. Hill,et al.  Homogeneous catalysis by transition metal oxygen anion clusters , 1995 .

[24]  M. Bañares,et al.  Genesis and Stability of Silicomolybdic Acid on Silica-Supported Molybdenum Oxide Catalysts: In-Situ Structural-Selectivity Study on Selective Oxidation Reactions , 1995 .

[25]  N. Mizuno,et al.  Pronounced catalytic activity of Fe0.08Cs2.5H1.26PVMo11O40 for direct oxidation of propane into acrylic acid , 1995 .

[26]  W. Ueda,et al.  Partial Oxidation of Propane to Acrylic Acid over Reduced Heteropolymolybdate Catalysts. , 1995 .

[27]  I. Kozhevnikov.  Heteropoly Acids and Related Compounds as Catalysts for Fine Chemical Synthesis , 1995 .

[28]  D. Spielbauer.  Implementation of the Scanning Multichannel Technique in Raman Spectroscopy and the Application for the Characterization of Oxides , 1995 .

[29]  C. O'connor,et al.  Infrared and thermal analysis studies of heteropoly acids , 1995 .

[30]  R. Schlögl,et al.  The Nature of the Active Phase in the Heteropolyacid Catalyst H4PvMo11O40·32H2O Used for the Selective Oxidation of Isobutyric Acid , 1995 .

[31]  N. Essayem,et al.  Acidic and catalytic properties of CsxH3−xPW12O40 heteropolyacid compounds , 1995 .

[32]  F. Cavani,et al.  Enhancement of catalytic activity of the ammonium/potassium salt of 12-molybdophosphoric acid by iron ion addition for the oxidation of isobutane to methacrylic acid , 1995 .

[33]  B. Delmon,et al.  Oxygen-Exchange Properties of MoO3: An in situ Raman Spectroscopy Study , 1994 .

[34]  J. Spivey,et al.  Selective oxidations of C4 paraffins , 1994 .

[35]  B. Lengeler,et al.  Structure of K-Doped Molybdena-on-Alumina Catalysts As Studied by X-ray Absorption and Raman Spectroscopy , 1994 .

[36]  A. Aboukaïs,et al.  Oxidative dehydrogenation of isobutyric acid on H4PVMo11O40, NaxH4-xPVMo11O40 and CUyH4-2yPVMo11O40 heteropolyacid catalysts supported on silica , 1994 .

[37]  M. Gazzano,et al.  Mechanism of thermal decomposition of potassium/ammonium salts of the 12-molybdophosphoric acid and effect on the catalytic performance in the isobutyric acid oxidehydrogenation , 1994 .

[38]  M. Misono,et al.  Heteropolyanions in catalysis , 1994 .

[39]  F. Cavani,et al.  On the antimony-stabilized cubic structure of potassium/ammonium salts of 12-molybdophosphoric acid and its catalytic performance in the oxidehydrogenation of ethane , 1994 .

[40]  N. Mizuno,et al.  Direct oxidation of isobutane into methacrylic acid and methacrolein over Cs2.5Ni0.08-substituted H3PMo12O40 , 1994 .

[41]  G. Centi,et al.  Reactivity of molybdovanadophosphoric acids: Influence of the presence of vanadium in the primary and secondary structure , 1993 .

[42]  R. Schlögl,et al.  Single crystal and powder diffraction studies of the structure of heteropolymolybdophosphoric acid catalysts , 1993 .

[43]  M. Che,et al.  Catalytic Behavior of Unsupported and Heteropolysalt-Supported H3+nPVnMo12−nO40 Heteropolyacids in the Test Reaction of CH3OH Oxidation , 1993 .

[44]  Volker Deckert,et al.  Scanning Multichannel Technique for Improved Spectrochemical Measurements with a CCD Camera and its Application to Raman Spectroscopy , 1992 .

[45]  M. Bartoli,et al.  Stabilization Of Heteropolyacids By Various Supports , 1992 .

[46]  F. Hardcastle,et al.  Molecular structure of molybdenum oxide in bismuth molybdates by Raman spectroscopy , 1991 .

[47]  F. Hardcastle,et al.  Determination of vanadium-oxygen bond distances and bond orders by Raman spectroscopy , 1991 .

[48]  M. Fournier,et al.  Catalysis by polyoxometalates. Part 3.—Influence of vanadium(V) on the thermal stability of 12-metallophosphoric acids from in situ infrared studies , 1991 .

[49]  J. Moffat,et al.  Observation of nitriles formed in the oxidative dehydrogenation of carboxylic acids over metal-oxygen cluster catalysts , 1991 .

[50]  R. Thouvenot,et al.  Catalysis by polyoxometalates. Part 1.—Supported polyoxoanions of the Keggin structure: spectroscopic study (IR, Raman, UV) of solutions used for impregnation , 1991 .

[51]  M. Che,et al.  Structure and catalytic properties of silica-supported polyoxomolybdates: II. Thermal Behavior of Unsupported and Silica-Supported 12-Molybdosilicic Acid catalysts from IR and Catalytic Reactivity Studies , 1990 .

[52]  F. Hardcastle,et al.  Determination of molybdenum–oxygen bond distances and bond orders by Raman spectroscopy , 1990 .

[53]  D. T. Lynch,et al.  Oxydehydrogenation of isobutyric acid with heteropolyacid catalysts: Experimental observations of deactivation , 1990 .

[54]  W. Kiefer,et al.  Improving Spectroscopic Techniques by a Scanning Multichannel Method , 1990 .

[55]  P. Colomban,et al.  Infrared and Raman study of some heteropolyacid hydrates , 1990 .

[56]  G. Centi,et al.  Active form of 12-vanadomolybdophosphoric acids in n-butane selective oxidation , 1990 .

[57]  H. Eckert,et al.  Solid-state vanadium-51 NMR structural studies on supported vanadium(V) oxide catalysts: vanadium oxide surface layers on alumina and titania supports , 1989 .

[58]  M. Misono,et al.  Catalysis by Heteropoly Compounds. XIII. An Infrared Study of Ethanol and Diethyl Ether in the Pseudoliquid Phase of 12-Tungstophosphoric Acid , 1989 .

[59]  M. Ai.  Oxidation of methacrolein to methacrylic acid on V2O5P2O5-based catalysts , 1989 .

[60]  A. Bielański,et al.  Infrared study of the thermal decomposition of heteropolyacids of the series H3+xPMo12–xVxO40 , 1989 .

[61]  G. Centi,et al.  Selective oxidation of n-pentane on 12-molybdovanadophosphoric acids , 1989 .

[62]  B. Ali,et al.  The oxidation of ketones with a heteropolyacid, H5[PMo10V2O40] and dioxygen , 1989 .

[63]  C. Hill.  Activation and functionalization of alkanes , 1989 .

[64]  G. Emig,et al.  Kinetic investigation of methacrylic acid synthesis on hetropoly-compounds† , 1988 .

[65]  K. Brückman,et al.  Heteropolysalt-supported heteropolyacids as a new class of acid-base and redox catalysts , 1988 .

[66]  I. Kozhevnikov.  Advances in Catalysis by Heteropolyacids , 1987 .

[67]  J. Goodenough,et al.  Acrolein oxidation over 12-molybdophosphates: III. Reaction mechanism , 1987 .

[68]  J. Goodenough,et al.  Acrolein oxidation over 12-molybdophosphates I. Characterization of the catalyst , 1987 .

[69]  J. Goodenough,et al.  Acrolein oxidation over 12-molybdophosphates. II. Catalytic testing , 1987 .

[70]  M. Misono.  Heterogeneous Catalysis by Heteropoly Compounds of Molybdenum and Tungsten , 1987 .

[71]  P. Courtine,et al.  Phosphomolybdic acid (H3PMo12O40) as a catalyst for the vapour-phase oxidative dehydrogenation of isobutyric acid : kinetic parameters of supported and unsupported catalysts. Role of water. , 1987 .

[72]  L. Pettersson,et al.  Multicomponent polyanions. 39. Speciation in the aqueous hydrogen ion-molybdate(MoO42-)-hydrogenphosphate(HPO42-) system as deduced from a combined Emf-phosphorus-31 NMR study , 1986 .

[73]  H.‐G. Jerschkewitz,et al.  Über die thermischen Eigenschaften von Heteropolysäuren des Typs H3+n[PVnMo12−nO40] · x H2O (n = 0, 1, 2, 3) II. Raman- und IR-spektroskopische Untersuchungen , 1985 .

[74]  H. Fichtner,et al.  Über die thermischen Eigenschaften von Heteropolysäuren des Typs H3+n[PVnMo12−nO40] · x H2O (n = 0, 1, 2, 3) I. Thermogravimetrische, UV‐VIS‐ und röntgenographische Untersuchungen , 1985 .

[75]  E. Echigoya,et al.  12-Heteropolymolybdates as catalysts for vapor-phase oxidative dehydrogenation of isobutyric acid: 2. Group Ib, IIb, IIIb, and VIII metal salts , 1984 .

[76]  M. Ai.  Catalytic activity of cesium salt of 12-molybdophosphoric acid containing a vanadium promoter in selective oxidation , 1984 .

[77]  S. Ikeda,et al.  Studies on yellow and colourless molybdophosphate complexes in the aqueous solution by laser raman spectroscopy , 1983 .

[78]  H.‐G. Jerschkewitz,et al.  Raman‐ und IR‐spektroskopische Untersuchungen an Heteropolysäuren H3+n(PMo12‐nVnO40) , 1982 .

[79]  Kazuya Sato,et al.  12-heteropolymolybdates as catalysts for vapor-phase oxidative dehydrogenation of isobutyric acid: I. Alkali and alkaline-earth metal salts , 1981 .

[80]  M. Ai.  Characteristics of heteropoly compounds as catalysts for selective oxidation , 1981 .

[81]  M. Py,et al.  Intra- and interlayer contributions to the lattice vibrations in MoO3 , 1981 .

[82]  É. N. Yurchenko.  Ramam amd ir spectra of hetero- and isopolycompoumds containing P, Mo, W, V atoms , 1980 .

[83]  M. A. Porai-Koshits,et al.  Crystal structure and role of the water molecules in mixed vanadomolybdophosphate heteropolycompounds of the 12 series. I. A new “pseudo-Keggin” type of structure in heteropolyacids H3+n[PMo12−nVnO40]·mH2O (n=2, 3; m=30–36) , 1980 .

[84]  M. Isobe,et al.  Substituent effects on the ratio of [2,3]-sigmatropic rearrangement vs syn-elimination of allylic aryl sulfoxides. , 1978 .

[85]  R. Massart,et al.  Phosphorus-31 NMR studies on molybdic and tungstic heteropolyanions. Correlation between structure and chemical shift , 1977 .

[86]  H. A. Levy,et al.  Dodecatungstophosphoric acid hexahydrate, (H5O2+)3(PW12O403−). The true structure of Keggin's `pentahydrate' from single-crystal X-ray and neutron diffraction data , 1977 .

[87]  P. Schmid,et al.  Raman scattering and structural properties of MoO3 , 1977 .

[88]  C. J. Clark,et al.  Dodecamolybdophosphoric acid circa 30-hydrate , 1976 .

[89]  A. Müller,et al.  Vibrational spectra of transition metal chalcogen compounds , 1974 .

[90]  W. Griffith,et al.  Vibrational spectra of nitrido and oxo complexes , 1973 .

[91]  K. Nakamoto.  Infrared spectra of inorganic and coordination compounds , 1970 .