Xie, K.; Yang, F.; Ebbinghaus, P.; Erbe, A.; Muhler, M.; Xia, W.: A reevaluation of the correlation between the synthesis parameters and structure and properties of nitrogen-doped carbon nanotubes. Journal of Energy Chemistry 24 (4), pp. 407 - 415 (2015)
If manganese nodules can be mined in an environmentally friendly way, the critical metals needed for the energy transition could be produced with low CO2 emissions