<i>The Defect Solid State</i>

Gray, Tom J.; Detwiler, D. P.; Rase, D. E.; Lawrence, W. G.; West, Richard; Jennings, Tina; Smoluchowski, R.

doi:10.1063/1.3062381

Cited by 14 publications

(6 citation statements)

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“…Tammann temperatures of some common transition-metal oxides. [5,34] [56] hexagonal (a = 39) Vanadium oxide [a] V 2 O 5 , DTABr, H 2 O lamellar (c = 21.6) [57] Vanadium oxide [a] oxovanadium triisopropoxide, dodecylamine, ethlamellar (c = 23-28) [58] anol/H 2 O hexagonal (a = 34.6) Vanadium oxide [a] VCl 4 , triblock copolymers, ethanol mesostructured (lack of long-range order) [59] (maximum d-spacing 111) Vanadium oxide [c] VOSO 4 , P123, ethanol/H 2 O wormhole like [60] ( [57] Molybdenum oxide [a] MoCl 5 , triblock copolymers, ethanol mesostructured (lack of long-range order) [59] (maximum d-spacing 100) Niobium oxide [b] niobium ethoxide, sodium dodecyl sulfate, solamellar (c = 25) hexagonal (a = 32-52), cu- [61,62] dium dodecyl phosphonate, primary alkylamines bic (d-spacing 48) Niobium oxide [b] NbCl 5 , tribolck copolymers, ethanol hexagonal [59,63] (a = 32-52) Titanium oxide [b] TiCl 4 , triblock copolymers, ethanol hexagonal (a = 117) [59,63] cubic (a = 107) Titanium oxide [c] peroxytitanates, CTACl, H 2 O lamellar (c = 31) [69] hexagonal (d-spacing 41) Titanium oxide [a] titanium isopropoxide, CTABr, ethylene glycol, mesostructured (lack of long-range order) [70] NaOH, (channel spacings 50) Zirconium oxide [b] zirconium n-propoxide, H 2 O, carboxylates, alkyl lamellar, [80] sulfonates, dodecyl sulfate, primary alkylamines hexagonal, mesostructured (lack of long-range order) (maximum d-spacings = 16-40) Zirconium oxide [b] ZrCl 4 , triblock copolymers, ethanol hexagonal [59,63] (a = 122) Zirconium oxide [a] Zr(OC 2 H 5 ) 4 , CTABr, ethylene glycol, NaOH mesostructured [70] (la...…”

Section: Thermal Stability Of Mesostructured Phasesmentioning

confidence: 98%

“…The mobility of metal ions or atoms in a crystalline metal oxide increases rapidly in the vicinity of its Tammann temperature, defined as 0.5-0.52T m , where T m is the melting point in Kelvin. [34] Therefore, it is not surprising that the low Tamman temperature of some transition-metal oxides [5,35] translates into a limited thermal stability of the corresponding mesostructures (Table 2). Finally, the structural collapse of mesophases may be caused by redox reac-tions occurring in the metal-oxide wall during surfactant removal or catalytic reaction.…”

Section: Thermal Stability Of Mesostructured Phasesmentioning

confidence: 99%

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Ordered Meso‐ and Macroporous Binary and Mixed Metal Oxides

2004

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A critical review is provided of the principles guiding the synthesis of meso-and macroporous metal oxides on multiple length scales in the presence of surfactant mesophases and colloidal arrays of monodisperse spheres, and correlations between the synthesis conditions and the properties of the resulting meso-and macroporous oxides, such as thermal stability, pore structure, elemental and nanophase compositions of the inorganic wall, etc. The thermal stability of mesostructured metal-oxide phases, in particular, is discussed in terms of charge-matching at the organic-inorganic interface, the strength of interactions between inorganic species and surfactant headgroups, the flexibility of the M-O-M bond angles in the constituent metal oxides, the Tammann temperature of the metal oxide, and the occurrence of redox reactions in the metal-oxide wall. The ordered meso-and

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Section: Thermal Stability Of Mesostructured Phasesmentioning

confidence: 98%

Section: Thermal Stability Of Mesostructured Phasesmentioning

confidence: 99%

Ordered Meso‐ and Macroporous Binary and Mixed Metal Oxides

2004

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“…3.6 CONDUCTIVITÉ ÉLECTRIQUE [12]. -Cette technique consiste à déterminer la conductivité électrique des catalyseurs solides et à étudier les variations de cette conductivité en fonction de l'insertion d'un élément étranger dans un solide (solution solide).…”

Section: And # X 3 E ;unclassified

Méthodes expérimentales de caractérisation des catalyseurs industriels

Védrine

1981

Rev. Phys. Appl. (Paris)

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2014 Dans cette mise au point nous avons cherché à présenter de façon très simplifiée aux scientifiques non initiés la Catalyse et surtout les problèmes expérimentaux qui se posent pour l'étude des processus de catalyse hétérogène. Après un rappel sur le phénomène catalytique et les catalyseurs les plus importants, nous abordons brièvement les réacteurs et l'étude des mécanismes réactionnels et de la cinétique chimique. Nous décrivons ensuite les principales méthodes physiques de caractérisation des catalyseurs en apportant un intérêt particulier à l'étude des surfaces et des mesures dans les conditions proches de la réaction catalytique. Enfin quelques exemples permettent de comprendre la complexité des problèmes et la nécessité d'utiliser conjointement plusieurs techniques physiques pour une approche plus exhaustive des propriétés des catalyseurs.Abstract. 2014 In this review article we have tried to present in a very simple manner « Catalysis and its related phenomena and problems » to scientists who are not familiar in this field. Introduction to catalytic phenomenon, catalytic reactions and reaction mechanisms is presented first, followed by a brief summary of the main catalysts and catalytical reactions with special emphasis to industrial interests. Questions, which still remain in catalysis field to explain catalytic properties, are raised and presented in terms of the knowledge of the catalyst and of the influence of the reagents on it (environment, changes in symmetry and oxidation state, surface modifications etc...). The main physical methods, which are of interest for characterizing catalysts properties, are presented with the main data which may be gained for a better understanding. Some examples of the use of the physical methods are given and analyzed. A special emphasis is presented on the necessity of using several physical methods to assess our knowledge on the catalytic properties of different materials. At last a special interest is brought about the characterization of surface properties and about the use of physical methods in conditions as close as possible to those of the catalytic reactions.

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“…With the thick oxide layers obtained in process tubes, the rates observed at the.water temperature attained cannot be explained by lattice diffusion. (14) At these low temperatures, lattice diffusion rates are quite low. Hence, the process must be diffusion along very small cracks in the oxide.…”

Section: Effects On the Oxide Filmmentioning

confidence: 99%

Summary status report internal corrosion of ribbed aluminum process tubes

Carlson¹,

Curtiss²,

Miller³

et al. 1962

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This report was prepared for use within General Electric Company in the course of work under Atomic Energy CommissionContract AT(45-1)-13.50, and any viewsor opinionsexpressedin the report are thoseof the author only. Thisreport is subjectto revisionupon collectionof additional data.. ' LEGAL NOTICE Thisreport was prepared as an account of Governmentsponsoredwork. Neither the United States, nor the Commission, nor any person acting on behalf of the Commission: A. Makesany warranty or representation,expressedor implied, with respectto the accuracy,comb pleteness,or usefulnessof the informc_tioncontained in this report, or that the useof any information, apparatus, method,or processdisclosedin this report may not infringe privately owned rights; or ,-B. Assumesat/ liabilities with respect to the use of, or for damages resultingfrom the use of any information,apFJratus, method, or processdisclosedin this report. As used in the above, "person acting on behalf of the Commission"includes any employee or b contractor of the Commission, or employee of suchcontractor,to the extentthat suchemployee or contractor of the Commission, or employee of suchcontractor prepares,disseminates, or providesaccessto, any information pursuantto his employment or contract with the Commissi ' such contractor. s4-3ooo-3eecs-e,) .,{.o,.'_.... o .... l_811_IttUTION OF THIS DOOUMENT IB UNLIMITL=E)

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The Defect Solid State

Cited by 14 publications

References 0 publications

Ordered Meso‐ and Macroporous Binary and Mixed Metal Oxides

Ordered Meso‐ and Macroporous Binary and Mixed Metal Oxides

Méthodes expérimentales de caractérisation des catalyseurs industriels

Summary status report internal corrosion of ribbed aluminum process tubes

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