Carbonaceous material for electric double layer capacitor, electric double layer capacitor and process for producing carbonaceous material

A process for producing a carbonaceous material as a polarizable active material for an electric double layer capacitor, the process comprising the steps of:

• providing a carbonaceous raw material;
• performing an activating treatment on the carbonaceous raw material to result in a heat-treated carbonaceous raw material;
• and
• conducting a treatment for removing residual functional groups remaining on the heat-treated carbonaceous raw material after the activating treatment, the treatment for removing residual functional groups comprising:
• applying a heat resistant support to a surface of the heat-treated carbonaceous raw material, the heat resistant support having a particulate shape;
• loading a noble-metal catalyst on a surface of the heat-resistant support;
• and
• providing a reducing atmosphere being a hydrogen atmosphere;
• and
• heat treating the noble-metal catalyst loaded on the surface of the heat resistant support in the reducing atmosphere under a mixed condition of the noble-metal catalyst and the heat-treated carbonaceous raw material having the heat resistant support, the noble-metal catalyst generating atomic active hydrogen.