TY - JOUR
T1 - Control of nitrogen content and its effects on the electrochemical behavior of nitrogen-doped carbon nanofibers
AU - Kim, Jiyoung
AU - Jang, Jin Sung
AU - Peck, Dong Hyun
AU - Lee, Byungrok
AU - Yoon, Seong Ho
AU - Jung, Doo Hwan
PY - 2016/5/1
Y1 - 2016/5/1
N2 - Nitrogen-doped carbon nanofibers (N-CNFs) with different nitrogen contents were synthesized from vaporized acetonitrile as a simultaneous carbon and nitrogen source via the chemical vapor deposition method. N-CNF synthesis was conducted at 640 °C for 2 h, and the ratio of nitrogen and hydrogen mixture as reactant gas was adjusted to control the nitrogen content in the N-CNFs. The amount of hydrogen in the reactant gas was varied in the range from 0 to 40 mL min-1. The physical and electrochemical properties of the N-CNFs were characterized. The content of introduced nitrogen decreased with the ratio of supplied hydrogen, as opposed to the growth yield of the N-CNFs. Additionally, the nitrogen content and chemical states of the N-CNFs were examined and compared to reveal their correlations with the electrochemical behavior. The N-CNFs were found to have a noticeable electrochemical behavior such as capacitance and oxygen reduction reaction activity that was determined by the total nitrogen contents, especially those of pyridinic-nitrogen.
AB - Nitrogen-doped carbon nanofibers (N-CNFs) with different nitrogen contents were synthesized from vaporized acetonitrile as a simultaneous carbon and nitrogen source via the chemical vapor deposition method. N-CNF synthesis was conducted at 640 °C for 2 h, and the ratio of nitrogen and hydrogen mixture as reactant gas was adjusted to control the nitrogen content in the N-CNFs. The amount of hydrogen in the reactant gas was varied in the range from 0 to 40 mL min-1. The physical and electrochemical properties of the N-CNFs were characterized. The content of introduced nitrogen decreased with the ratio of supplied hydrogen, as opposed to the growth yield of the N-CNFs. Additionally, the nitrogen content and chemical states of the N-CNFs were examined and compared to reveal their correlations with the electrochemical behavior. The N-CNFs were found to have a noticeable electrochemical behavior such as capacitance and oxygen reduction reaction activity that was determined by the total nitrogen contents, especially those of pyridinic-nitrogen.
UR - http://www.scopus.com/inward/record.url?scp=84959534010&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84959534010&partnerID=8YFLogxK
U2 - 10.1016/j.jelechem.2016.02.032
DO - 10.1016/j.jelechem.2016.02.032
M3 - Article
AN - SCOPUS:84959534010
VL - 768
SP - 34
EP - 40
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 0368-1874
ER -