Metals doped carbon nanotubes and carbon nanocages (Co 2 -CNT(8, 0) and Sc 2 -C 78 ) as catalysts of ORR in fuel cells

The nano structures (CNT(8, 0) and C ) are doped with two Co and Sc metals in order to obtain the suitable catalysts to process the ORR. The effects of different solvents on ORR on Co-C-C-Co-CNT(8, 0) and Sc-C are examined in benzene, methanol and water by polarizable continuum model. The ORR on Co-C-C-Co-CNT(8, 0) and Sc-C-C-Sc-C are processed by two paths as follow: *OOH-Co-C-C-Co-CNT(8, 0) → *OH-Co-C-C-Co-CNT(8, 0)-*OH → *OH-Co-C-C-Co-CNT(8, 0)→ *Co-C-C-Co-CNT(8, 0) reactions and *OOH-Co-C-C-Co-CNT(8, 0) → *OH-Co-C-C-Co-CNT(8, 0)-*OH → *OH-Co-C-C-Co-CNT(8, 0)→ *Co-C-C-Co-CNT(8, 0) reactions. Results shown that the Co-C-C-Co-CNT(8, 0) has higher potential than Sc-C-C-Sc-C for ORR in benzene, methanol and water. Over potential on Co-C-C-Co-CNT(8, 0) and Sc-C-C-Sc-C are lower than various metals based nano catalysts.