| 摘要 |
This carbon nanofiber is produced by a vapor phase reaction of a carbon oxide-containing raw material gas using a metal oxide powder including a Co oxide as a catalyst, wherein at least one type selected from metal cobalt, carbon-containing cobalt metals, and cobalt-carbon compounds is contained (encapsulated) in the fiber in a wrapped state. This method for producing a carbon nanofiber includes: producing a carbon nanofiber by a vapor phase reaction of a carbon oxide-containing raw material gas using a mixed powder of a Co oxide and a Mg oxide as a catalyst, wherein a mixed powder of CoO and MgO, which is obtained by hydrogen-reducing a mixed powder of Co 3 O 4 and MgO using a reduction gas having a hydrogen concentration in which metal cobalt is not generated, is used as the catalyst. |
