Nitrogen-doped ordered porous carbon catalyst for oxygen reduction reaction in proton exchange membrane fuel cells

Altansukh Dorjgotov, Jinhee Ok, Yukwon Jeon, Seong-Ho Yoon, Yong Gun Shul

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Three different N-doped ordered porous carbons (CNx) were produced by a nanocasting process using polyaniline as the carbon and nitrogen precursor. A pyrolysis treatment of iron chloride-impregnated CNx under nitrogen is used in the preparation of the carbon composite catalysts, and this is followed by posttreatments and optimization of the iron loading and the pore size. Exploration of the catalytic activity of the CNx products for catalyzing the oxygen reduction reaction (ORR) using rotating disk electrode measurements and single-cell tests shows that the onset potential for ORR of the most effective catalyst in 0.5 M H2SO4 is as high as 0.9 V vs. the normal hydrogen electrode. A proton exchange membrane fuel cell constructed with the catalyst exhibits a current density as high as 0.52 A cm-2 at 0.6 V with 2 atm back pressure using a cathode catalyst loading of 6 mg cm -2. The average pore diameters of synthesized CNx-12, CNx-15, and CNx-16 are 0.7, 4.3, and 14 nm, respectively. It is observed that the pore size and specific surface area are an important factor for increased catalyst activity. The pore size of the most effective catalysts is found to be 4.3 nm.

Original languageEnglish
Pages (from-to)2567-2577
Number of pages11
JournalJournal of Solid State Electrochemistry
Volume17
Issue number10
DOIs
Publication statusPublished - Oct 1 2013

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All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Materials Science(all)

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