Catalysts and electrocatalysts for the selective oxidation of propylene. Annual report

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This paper presents a summary of the status of the work on three topics: synthesis and characterization of the Mn doped bismuth vanadates; electrode studies; and oxygen permeation. The authors have made a detailed study of manganese doped bismuth vanadates with the general composition Bi{sub 2}V{sub 1{minus}x}Mn{sub x}O{sub 5.5{minus}{delta}}. The phase diagram of Bi{sub 2}V{sub 1{minus}x}Mn{sub x}O{sub 5.5{minus}{delta}} has been investigated by diffraction and thermal analysis and they have found that the tetragonal phase can be stabilized in the composition range 0.1 {le} x {le} 0.25. The have used ac impedance techniques to study the properties of some electrocatalysts. The ... continued below

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6 p.

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Creator: Unknown. February 14, 1995.

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Description

This paper presents a summary of the status of the work on three topics: synthesis and characterization of the Mn doped bismuth vanadates; electrode studies; and oxygen permeation. The authors have made a detailed study of manganese doped bismuth vanadates with the general composition Bi{sub 2}V{sub 1{minus}x}Mn{sub x}O{sub 5.5{minus}{delta}}. The phase diagram of Bi{sub 2}V{sub 1{minus}x}Mn{sub x}O{sub 5.5{minus}{delta}} has been investigated by diffraction and thermal analysis and they have found that the tetragonal phase can be stabilized in the composition range 0.1 {le} x {le} 0.25. The have used ac impedance techniques to study the properties of some electrocatalysts. The objective was to investigate the utility of the technique for obtaining mechanistic information relevant to an electrocatalytic reactor. Initial studies were of oxygen activation on silver electrodes. Finally, they have constructed an apparatus for high temperature permeation measurements and studied one system, the defect perovskite oxide SrCo{sub 0.8}Fe{sub 0.2}O{sub 3{minus}{delta}} (SCFO), in detail. Important conclusions of the work are to confirm the high permeation rates at high temperature (a flux of 10{sup {minus}6} mol/sec cm{sup 2} is equivalent to 1 cm{sup 3}/min cm{sup 2}) and to demonstrate that the surface exchange kinetics were rate limiting for this material.

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6 p.

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OSTI as DE96015153

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  • Other Information: PBD: 14 Feb 1995

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  • Other: DE96015153
  • Report No.: LA-SUB--96-107
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/378800 | External Link
  • Office of Scientific & Technical Information Report Number: 378800
  • Archival Resource Key: ark:/67531/metadc679082

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  • February 14, 1995

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  • July 25, 2015, 2:20 a.m.

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  • July 28, 2016, 7:07 p.m.

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Catalysts and electrocatalysts for the selective oxidation of propylene. Annual report, report, February 14, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc679082/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.