Control of nitrogen content and its effects on the electrochemical behavior of nitrogen-doped carbon nanofibers

Jiyoung Kim, Jin Sung Jang, Dong Hyun Peck, Byungrok Lee, Seong Ho Yoon, Doo Hwan Jung

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7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)34-40
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume768
DOIs
Publication statusPublished - May 1 2016

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All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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