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The Boerne Star (Boerne, Tex.), Vol. 89, No. 30, Ed. 1 Wednesday, July 7, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
July 7, 1993
Creator:
Aldridge, Leon & Priddy, Travis
Object Type:
Newspaper
System:
The Portal to Texas History
Oxygen electrode reaction in molten carbonate fuel cells
Molten carbonate fuel cell system is a leading candidate for the utility power generation because of its high efficiency for fuel to AC power conversion, capability for an internal reforming, and a very low environmental impact. However, the performance of the molten carbonate fuel cell is limited by the oxygen reduction reaction and the cell life time is limited by the stability of the cathode material. An elucidation of oxygen reduction reaction in molten alkali carbonate is essential because overpotential losses in the molten carbonate fuel cell are considerably greater at the oxygen cathode than at the fuel anode. Oxygen reduction on a fully-immersed gold electrode in a lithium carbonate melt was investigated by electrochemical impedance spectroscopy and cyclic voltammetry to determine electrode kinetic and mass transfer parameters. The dependences of electrode kinetic and mass transfer parameters on gas composition and temperature were examined to determine the reaction orders and the activation energies. The results showed that oxygen reduction in a pure lithium carbonate melt occurs via the peroxide mechanism. A mass transfer parameter, D{sub O}{sup 1/2}C{sub O}, estimated by the cyclic voltammetry concurred with that calculated by the EIS technique. The temperature dependence of the exchange current density and …
Date:
July 7, 1992
Creator:
Appleby, A. J. & White, R. E.
Object Type:
Report
System:
The UNT Digital Library
Oxygen electrode reaction in molten carbonate fuel cells. Final report, September 15, 1987--September 14, 1990
Molten carbonate fuel cell system is a leading candidate for the utility power generation because of its high efficiency for fuel to AC power conversion, capability for an internal reforming, and a very low environmental impact. However, the performance of the molten carbonate fuel cell is limited by the oxygen reduction reaction and the cell life time is limited by the stability of the cathode material. An elucidation of oxygen reduction reaction in molten alkali carbonate is essential because overpotential losses in the molten carbonate fuel cell are considerably greater at the oxygen cathode than at the fuel anode. Oxygen reduction on a fully-immersed gold electrode in a lithium carbonate melt was investigated by electrochemical impedance spectroscopy and cyclic voltammetry to determine electrode kinetic and mass transfer parameters. The dependences of electrode kinetic and mass transfer parameters on gas composition and temperature were examined to determine the reaction orders and the activation energies. The results showed that oxygen reduction in a pure lithium carbonate melt occurs via the peroxide mechanism. A mass transfer parameter, D{sub O}{sup 1/2}C{sub O}, estimated by the cyclic voltammetry concurred with that calculated by the EIS technique. The temperature dependence of the exchange current density and …
Date:
July 7, 1992
Creator:
Appleby, A. J. & White, R. E.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Blue Whale
Photograph of the restored Blue Whale, off Route 66.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue Whale
Photograph of the restored Blue Whale, off Route 66.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue Whale
Photograph of the restored Blue Whale, off Route 66.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue Whale
Photograph of the restored Blue Whale, off Route 66.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Cha Tullis Mural
Photograph of a Cha Tullis mural.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Chickasaw National Recreation Area
Photograph of a scene in the Chickasaw National Recreation Area.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Chickasaw National Recreation Area
Photograph of a scene in the Chickasaw National Recreation Area.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Chickasaw National Recreation Area
Photograph of a scene in the Chickasaw National Recreation Area.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Chickasaw National Recreation Area
Photograph of a scene in the Chickasaw National Recreation Area.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Chickasaw National Recreation Area
Photograph of a scene in the Chickasaw National Recreation Area.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Chickasaw National Recreation Area
Photograph of a scene in the Chickasaw National Recreation Area.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Chickasaw National Recreation Area
Photograph of a scene in the Chickasaw National Recreation Area.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Chickasaw National Recreation Area
Photograph of a scene in the Chickasaw National Recreation Area.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Dewey Hotel
Photograph of the exterior of the historic Dewey Hotel.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Dewey Hotel
Photograph of the exterior of the historic Dewey Hotel.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Dewey Hotel
Photograph of the exterior of the historic Dewey Hotel.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Dewey Hotel
Photograph of the exterior of the historic Dewey Hotel.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Dewey Hotel
Photograph of the exterior of the historic Dewey Hotel.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Dewey Hotel
Photograph of the exterior of the historic Dewey Hotel.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Dewey Hotel
Photograph of the exterior of the historic Dewey Hotel.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Dewey Hotel
Photograph of the exterior of the historic Dewey Hotel.
Date:
July 7, 1997
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History