(US5929286-A)      A two-part catalyst comprises a dehydrogenation portion and an oxide-ion conducting portion. A method of forming a hydrogen rich gas from a source of hydrocarbon fuel involves contacting the fuel with the above catalyst at 400 C min. for a time sufficient to generate the gas while maintaining the carbon monoxide content to less than 5 vol.%.    Preferably the dehydrogenation portion includes a Group VIII metal, especially palladium and/or platinum, or a group VIII metal other than nickel. The oxide-ion conducting portion is a ceramic oxide doped with a rare earth especially gandolinium and/or samarium and an alkali or alkaline earth metal, and can include a ceramic oxide of zirconium, cerium, bismuth, bismuth.vanadium and/or lanthanum/gallium and a dopant selected from rare earths, alkaline earth and alkali metals. The catalyst is effective at temperatures 500-900 C, and the fuel is gasoline, natural gas rich in alkanes, a gas containing branched alkanes, or alkanes.    USE -   For use in forming hydrogen rich gas from source of hydrocarbon fuel especially for use in fuel cells e.g. for vehicles.    ADVANTAGE -   Provides effective conversion to hydrogen rich gas while minimising formation of carbon dioxide.    (EP939672-A1)      A two-part catalyst comprises a dehydrogenation portion and an oxide-ion conducting portion. A method of forming a hydrogen rich gas from a source of hydrocarbon fuel involves contacting the fuel with the above catalyst at 400 C min. for a time sufficient to generate the gas while maintaining the carbon monoxide content to less than 5 vol.%.    Preferably the dehydrogenation portion includes a Group VIII metal, especially palladium and/or platinum, or a group VIII metal other than nickel. The oxide-ion conducting portion is a ceramic oxide doped with a rare earth especially gandolinium and/or samarium and an alkali or alkaline earth metal, and can include a ceramic oxide of zirconium, cerium, bismuth, bismuth.vanadium and/or lanthanum/gallium and a dopant selected from rare earths, alkaline earth and alkali metals. The catalyst is effective at temperatures 500-900 C, and the fuel is gasoline, natural gas rich in alkanes, a gas containing branched alkanes, or alkanes.    USE -   For use in forming hydrogen rich gas from source of hydrocarbon fuel especially for use in fuel cells e.g. for vehicles.    ADVANTAGE -   Provides effective conversion to hydrogen rich gas while minimising formation of carbon dioxide.    (JP2000505725-W)      A two-part catalyst comprises a dehydrogenation portion and an oxide-ion conducting portion. A method of forming a hydrogen rich gas from a source of hydrocarbon fuel involves contacting the fuel with the above catalyst at 400 C min. for a time sufficient to generate the gas while maintaining the carbon monoxide content to less than 5 vol.%.    Preferably the dehydrogenation portion includes a Group VIII metal, especially palladium and/or platinum, or a group VIII metal other than nickel. The oxide-ion conducting portion is a ceramic oxide doped with a rare earth especially gandolinium and/or samarium and an alkali or alkaline earth metal, and can include a ceramic oxide of zirconium, cerium, bismuth, bismuth.vanadium and/or lanthanum/gallium and a dopant selected from rare earths, alkaline earth and alkali metals. The catalyst is effective at temperatures 500-900 C, and the fuel is gasoline, natural gas rich in alkanes, a gas containing branched alkanes, or alkanes.    USE -   For use in forming hydrogen rich gas from source of hydrocarbon fuel especially for use in fuel cells e.g. for vehicles.    ADVANTAGE -   Provides effective conversion to hydrogen rich gas while minimising formation of carbon dioxide.    (US6110861-A)      A two-part catalyst comprises a dehydrogenation portion and an oxide-ion conducting portion. A method of forming a hydrogen rich gas from a source of hydrocarbon fuel involves contacting the fuel with the above catalyst at 400 C min. for a time sufficient to generate the gas while maintaining the carbon monoxide content to less than 5 vol.%.    Preferably the dehydrogenation portion includes a Group VIII metal, especially palladium and/or platinum, or a group VIII metal other than nickel. The oxide-ion conducting portion is a ceramic oxide doped with a rare earth especially gandolinium and/or samarium and an alkali or alkaline earth metal, and can include a ceramic oxide of zirconium, cerium, bismuth, bismuth.vanadium and/or lanthanum/gallium and a dopant selected from rare earths, alkaline earth and alkali metals. The catalyst is effective at temperatures 500-900 C, and the fuel is gasoline, natural gas rich in alkanes, a gas containing branched alkanes, or alkanes.    USE -   For use in forming hydrogen rich gas from source of hydrocarbon fuel especially for use in fuel cells e.g. for vehicles.    ADVANTAGE -   Provides effective conversion to hydrogen rich gas while minimising formation of carbon dioxide.