Abstract
This study examines the role of transition metals (Co or Fe) on nitrogen-modified carbon-based catalysts for the oxygen reduction reaction (ORR). The nitrogen-modified carbon-based catalysts are synthesized by the pyrolysis process in the presence of polypyrrole (PPy) and ethylenediamine (ED) with different amounts of transition metals. Electrochemical data and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) analysis do not support that the transition metal itself behaves as an active site for ORR. The X-ray photoelectron spectroscopy (XPS) and elemental analysis results show that the total nitrogen content and the active nitrogen functional groups, such as pyridinic-N and graphitic-N, are strongly dependent on the type of transition metal and the amount of transition metal used. Therefore, it is believed that transition metals serve to catalyze the formation of active nitrogen functional groups for the ORR by doping nitrogen into carbon.
| Original language | English |
|---|---|
| Pages (from-to) | 220-225 |
| Number of pages | 6 |
| Journal | Journal of Power Sources |
| Volume | 212 |
| DOIs | |
| Publication status | Published - 2012 Aug 15 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
Cite this
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The role of transition metals in non-precious nitrogen-modified carbon-based electrocatalysts for oxygen reduction reaction. / Oh, Hyung Suk; Kim, Hansung.
In: Journal of Power Sources, Vol. 212, 15.08.2012, p. 220-225.Research output: Contribution to journal › Article
TY - JOUR
T1 - The role of transition metals in non-precious nitrogen-modified carbon-based electrocatalysts for oxygen reduction reaction
AU - Oh, Hyung Suk
AU - Kim, Hansung
PY - 2012/8/15
Y1 - 2012/8/15
N2 - This study examines the role of transition metals (Co or Fe) on nitrogen-modified carbon-based catalysts for the oxygen reduction reaction (ORR). The nitrogen-modified carbon-based catalysts are synthesized by the pyrolysis process in the presence of polypyrrole (PPy) and ethylenediamine (ED) with different amounts of transition metals. Electrochemical data and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) analysis do not support that the transition metal itself behaves as an active site for ORR. The X-ray photoelectron spectroscopy (XPS) and elemental analysis results show that the total nitrogen content and the active nitrogen functional groups, such as pyridinic-N and graphitic-N, are strongly dependent on the type of transition metal and the amount of transition metal used. Therefore, it is believed that transition metals serve to catalyze the formation of active nitrogen functional groups for the ORR by doping nitrogen into carbon.
AB - This study examines the role of transition metals (Co or Fe) on nitrogen-modified carbon-based catalysts for the oxygen reduction reaction (ORR). The nitrogen-modified carbon-based catalysts are synthesized by the pyrolysis process in the presence of polypyrrole (PPy) and ethylenediamine (ED) with different amounts of transition metals. Electrochemical data and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) analysis do not support that the transition metal itself behaves as an active site for ORR. The X-ray photoelectron spectroscopy (XPS) and elemental analysis results show that the total nitrogen content and the active nitrogen functional groups, such as pyridinic-N and graphitic-N, are strongly dependent on the type of transition metal and the amount of transition metal used. Therefore, it is believed that transition metals serve to catalyze the formation of active nitrogen functional groups for the ORR by doping nitrogen into carbon.
UR - http://www.scopus.com/inward/record.url?scp=84860586229&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84860586229&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2012.03.098
DO - 10.1016/j.jpowsour.2012.03.098
M3 - Article
AN - SCOPUS:84860586229
VL - 212
SP - 220
EP - 225
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -