Methods for producing metal carbide and hydrocarbon, and carboncontaining member

A method for producing a hydrocarbon, comprising:

• electrode preparation comprising:
• preparing a first molten salt containing at least one first metal ion selected from the group consisting of alkali metal ions and alkali earth metal ions, and a carbonate ion derived from carbon dioxide, and
• applying a voltage to the first molten salt to precipitate a precipitate containing carbon on a first electrode, thereby obtaining a second electrode;
• electrolysis comprising applying a voltage to a second molten salt containing at least one second metal ion selected from the group consisting of alkali metal ions and alkali earth metal ions using the second electrode to obtain a carbide composition containing a carbide of the second metal;
• and
• gas generation comprising hydrolyzing the carbide of the second metal to obtain gas containing a hydrocarbon.

A carbon-containing member comprising:

• a base;
• a metal carbide layer covering at least a part of the base and containing a carbide of at least one second metal selected from the group consisting of alkali metals and alkali earth metals;
• and
• a carbon layer covering at least a part of the metal carbide layer, containing carbon, and being substantially free from the second metal carbide.