Influence of Ni on carbon nanotube production with Fe-based catalysts

This study investigates the role of Ni in CNT production using Fe-based catalysts. Among the various catalysts used, such as 40Fe–0Ni, 40Fe–1Ni, 40Fe–3Ni, 40Fe–5Ni, 40Fe–7Ni, and 40Fe– 10Ni, the 40Fe–5Ni catalyst achieved a notable yield of 5.80 gC per g metal, which is higher than the 1.03 gC per g metal obtained with the pure Fe catalyst. DFT study reveals that Fe₃Ni exhibits stronger carbon binding, enabling more efficient CNT production and supporting our experimental results.