Abstract
Although nitrogen-doped carbon catalysts are promising candidates for oxygen reduction reactions (ORRs), the role of the nitrogen bonding structure, such as pyridinic-N, amino-N, and graphitic-N, on the ORR activity remains controversial. Furthermore, despite recent progress in tuning the C−N chemical bonding states within the carbon materials by using chemical vapor deposition and post heat treatment, a systematic evaluation of various N moieties remains challenging, owing to the differences in the thermal stabilities of different types of bonds. Herein, we successfully designed a method to tailor pyridinic-N, amino-N, and graphitic-N bonding in N-doped carbon nanoparticles fabricated through a plasma process combined with post heat treatment. Investigations on the electrochemical performance of the fabricated materials suggested that catalysts with dominant amino-N exhibited higher current density, where graphitic-N has a positive effect on the ORR onset potential. This synthetic strategy provides a simple and efficient approach for studying the relationship between the C−N bonding structure and the electrochemical performance of N-doped carbon catalysts.
| Original language | English |
|---|---|
| Pages (from-to) | 1995-2001 |
| Number of pages | 7 |
| Journal | ChemElectroChem |
| Volume | 5 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 2018 Jul 11 |
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Keywords
- graphitic-N
- nitrogen-doped carbon
- plasma synthesis
- pyridinic-N
- selective doping
ASJC Scopus subject areas
- Catalysis
- Electrochemistry
Cite this
Oxygen Reduction Reaction Activity of Thermally Tailored Nitrogen-Doped Carbon Electrocatalysts Prepared through Plasma Synthesis. / Li, Oi Lun; Wada, Yuta; Kaneko, Amane; Lee, Hoonseung; Ishizaki, Takahiro.
In: ChemElectroChem, Vol. 5, No. 14, 11.07.2018, p. 1995-2001.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Oxygen Reduction Reaction Activity of Thermally Tailored Nitrogen-Doped Carbon Electrocatalysts Prepared through Plasma Synthesis
AU - Li, Oi Lun
AU - Wada, Yuta
AU - Kaneko, Amane
AU - Lee, Hoonseung
AU - Ishizaki, Takahiro
PY - 2018/7/11
Y1 - 2018/7/11
N2 - Although nitrogen-doped carbon catalysts are promising candidates for oxygen reduction reactions (ORRs), the role of the nitrogen bonding structure, such as pyridinic-N, amino-N, and graphitic-N, on the ORR activity remains controversial. Furthermore, despite recent progress in tuning the C−N chemical bonding states within the carbon materials by using chemical vapor deposition and post heat treatment, a systematic evaluation of various N moieties remains challenging, owing to the differences in the thermal stabilities of different types of bonds. Herein, we successfully designed a method to tailor pyridinic-N, amino-N, and graphitic-N bonding in N-doped carbon nanoparticles fabricated through a plasma process combined with post heat treatment. Investigations on the electrochemical performance of the fabricated materials suggested that catalysts with dominant amino-N exhibited higher current density, where graphitic-N has a positive effect on the ORR onset potential. This synthetic strategy provides a simple and efficient approach for studying the relationship between the C−N bonding structure and the electrochemical performance of N-doped carbon catalysts.
AB - Although nitrogen-doped carbon catalysts are promising candidates for oxygen reduction reactions (ORRs), the role of the nitrogen bonding structure, such as pyridinic-N, amino-N, and graphitic-N, on the ORR activity remains controversial. Furthermore, despite recent progress in tuning the C−N chemical bonding states within the carbon materials by using chemical vapor deposition and post heat treatment, a systematic evaluation of various N moieties remains challenging, owing to the differences in the thermal stabilities of different types of bonds. Herein, we successfully designed a method to tailor pyridinic-N, amino-N, and graphitic-N bonding in N-doped carbon nanoparticles fabricated through a plasma process combined with post heat treatment. Investigations on the electrochemical performance of the fabricated materials suggested that catalysts with dominant amino-N exhibited higher current density, where graphitic-N has a positive effect on the ORR onset potential. This synthetic strategy provides a simple and efficient approach for studying the relationship between the C−N bonding structure and the electrochemical performance of N-doped carbon catalysts.
KW - graphitic-N
KW - nitrogen-doped carbon
KW - plasma synthesis
KW - pyridinic-N
KW - selective doping
UR - http://www.scopus.com/inward/record.url?scp=85049806020&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049806020&partnerID=8YFLogxK
U2 - 10.1002/celc.201800063
DO - 10.1002/celc.201800063
M3 - Article
VL - 5
SP - 1995
EP - 2001
JO - ChemElectroChem
JF - ChemElectroChem
SN - 2196-0216
IS - 14
ER -