TY - JOUR
T1 - Non-platinum oxygen reduction electrocatalysts based on carbon-supported metal-polythiophene composites
AU - Han, Su Jung
AU - Jung, Hyun Jung
AU - Shim, Jun Ho
AU - Kim, Hyun Chul
AU - Sung, Shi Joon
AU - Yoo, Bong
AU - Lee, Dong Ha
AU - Lee, Chongmok
AU - Lee, Youngmi
N1 - Funding Information:
This research was carried out under the General R/D Program of the Daegu Gyeongbuk Institute of Science & Technology (DGIST), funded by Ministry of Education, Science and Technology (MEST) of the Republic of Korea.
PY - 2011/5/15
Y1 - 2011/5/15
N2 - A series of carbon-supported metal-polythiophene composite (M-PTh/C) electrocatalysts are synthesized based on seven different non-Pt metals (M = Ir, Ru, Pd, Co, Fe, Ni, Sn) using chemical polymerization method. The electrocatalytic activity toward the oxygen reduction reaction (ORR) is characterized in acidic condition using rotating disk electrode voltammetry. Ir-, Ru-, and Pd-PTh/C show far more positive (ca. 700 mV) ORR onset potentials than Co-, Fe-, Ni-, and Sn-PTh/C. Further studies on the ORR kinetics are carried out for the three superior catalysts, Ir-, Ru-, Pd-PTh/C, using Koutecky-Levich and Tafel plots. The number of electrons (n) transferred in the ORR is ∼4 for these three catalysts, suggesting 4-electron transfer ORR is dominant. Considering all the obtained factors (such as the onset potential, n value, and exchange current density), Ir- and Ru-PTh/C catalysts are concluded to have relatively excellent ORR catalytic activity.
AB - A series of carbon-supported metal-polythiophene composite (M-PTh/C) electrocatalysts are synthesized based on seven different non-Pt metals (M = Ir, Ru, Pd, Co, Fe, Ni, Sn) using chemical polymerization method. The electrocatalytic activity toward the oxygen reduction reaction (ORR) is characterized in acidic condition using rotating disk electrode voltammetry. Ir-, Ru-, and Pd-PTh/C show far more positive (ca. 700 mV) ORR onset potentials than Co-, Fe-, Ni-, and Sn-PTh/C. Further studies on the ORR kinetics are carried out for the three superior catalysts, Ir-, Ru-, Pd-PTh/C, using Koutecky-Levich and Tafel plots. The number of electrons (n) transferred in the ORR is ∼4 for these three catalysts, suggesting 4-electron transfer ORR is dominant. Considering all the obtained factors (such as the onset potential, n value, and exchange current density), Ir- and Ru-PTh/C catalysts are concluded to have relatively excellent ORR catalytic activity.
KW - Electrocatalyst
KW - Metal-polymer composite
KW - Oxygen reduction reaction
KW - Polythiophene
UR - http://www.scopus.com/inward/record.url?scp=79953713643&partnerID=8YFLogxK
U2 - 10.1016/j.jelechem.2011.02.012
DO - 10.1016/j.jelechem.2011.02.012
M3 - Article
AN - SCOPUS:79953713643
SN - 1572-6657
VL - 655
SP - 39
EP - 44
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1
ER -