Metal-Doped Carbon Nanotubes incorporate metal atoms or nanoparticles—such as Fe, Ni, Co, Pt, or Au—within or onto the CNT structure to enhance functional performance. This controlled doping significantly improves electrochemical activity, catalytic efficiency, and magnetic properties, making these materials highly suitable for fuel cells, hydrogen storage systems, and advanced catalytic applications. Nanographenex metal-doped CNT solutions support reliable performance for both research-driven innovation and scalable industrial deployment.