Abstract: A fuel cell electrode that contains a support layer and a catalyst layer, wherein the catalyst layer does not contain a noble metal catalyst and is formed of carbon nanotubes, wherein the carbon nanotubes have pores in sidewalls thereof, and have a pore size distribution of 0.1 nm to 30 nm and a BET specific surface area of 100 to 4,000 m2/g, wherein the pores penetrate or do not penetrate the sidewalls.

Abstract: A fuel cell electrode that contains a support layer and a catalyst layer, wherein the catalyst layer does not contain a noble metal catalyst and is formed of carbon nanotubes, wherein the carbon nanotubes have pores in sidewalls thereof, and have a pore size distribution of 0.1 nm to 30 nm and a BET specific surface area of 100 to 4,000 m2/g, wherein the pores penetrate or do not penetrate the sidewalls.

Abstract: A carbon nanotube (CNT) is provided having micropores with a diameter of 1 to 10 nm in the side wall and in turn, having a large specific surface area. A production method of a surface-modified CNT (DMWCNT), comprises heating CNT having supported on the surface thereof a metal oxide or metal nitrate fine particle at a temperature of 100 to 1000° C., such as, 200 to 500° C., in an atmosphere containing oxygen. A cyclical solid phase oxidation-reduction reaction between the metal oxide and CNT occurs on the surface of the metal oxide fine particle supported on CNT, and carbon of CNT is oxidized to open a micropore. The metal oxide is preferably cobalt oxide, and the metal nitrate is preferably cobalt nitrate.