TY - JOUR
T1 - Transition metal-nitrogen-carbon catalysts for oxygen reduction reaction in neutral electrolyte
AU - Rojas-Carbonell, Santiago
AU - Santoro, Carlo
AU - Serov, Alexey
AU - Atanassov, Plamen
N1 - Publisher Copyright:
© 2016 The Authors
PY - 2017/2/1
Y1 - 2017/2/1
N2 - Platinum group metal-free (PGM-free) catalysts based on M-N-C types of materials with M as Mn, Fe, Co and Ni and aminoantipyrine (AAPyr) as N-C precursors were synthesized using sacrificial support method. Catalysts kinetics of oxygen reduction reaction (ORR) was studied using rotating ring disk electrode (RRDE) in neutral pH. Results showed that performances were distributed among the catalysts as: Fe-AAPyr > Co-AAPyr > Mn-AAPyr > Ni-AAPyr. Fe-AAPyr had the highest onset potential and half-wave potential. All the materials showed similar limiting current. Fe-AAPyr had an electron transfer involving 4e− with peroxide formed lower than 5%. Considering H2O2 produced, it seems that Co-AAPyr, Mn-AAPyr and Ni-AAPyr follow a 2 × 2e− mechanism with peroxide formed during the intermediate step. Durability test was done on Fe-AAPyr for 10,000 cycles. Decrease of activity was observed only after 10,000 cycles.
AB - Platinum group metal-free (PGM-free) catalysts based on M-N-C types of materials with M as Mn, Fe, Co and Ni and aminoantipyrine (AAPyr) as N-C precursors were synthesized using sacrificial support method. Catalysts kinetics of oxygen reduction reaction (ORR) was studied using rotating ring disk electrode (RRDE) in neutral pH. Results showed that performances were distributed among the catalysts as: Fe-AAPyr > Co-AAPyr > Mn-AAPyr > Ni-AAPyr. Fe-AAPyr had the highest onset potential and half-wave potential. All the materials showed similar limiting current. Fe-AAPyr had an electron transfer involving 4e− with peroxide formed lower than 5%. Considering H2O2 produced, it seems that Co-AAPyr, Mn-AAPyr and Ni-AAPyr follow a 2 × 2e− mechanism with peroxide formed during the intermediate step. Durability test was done on Fe-AAPyr for 10,000 cycles. Decrease of activity was observed only after 10,000 cycles.
KW - Current production
KW - Electron transfer
KW - Neutral pH
KW - ORR
KW - PGM-free
UR - http://www.scopus.com/inward/record.url?scp=85007115687&partnerID=8YFLogxK
U2 - 10.1016/j.elecom.2016.12.011
DO - 10.1016/j.elecom.2016.12.011
M3 - Article
AN - SCOPUS:85007115687
SN - 1388-2481
VL - 75
SP - 38
EP - 42
JO - Electrochemistry Communications
JF - Electrochemistry Communications
ER -