Platinum catalysts protected by N-doped carbon for highly efficient and durable polymer-electrolyte membrane fuel cells

Hyeong Su Kim, Yeayeon Lee, Jin Goo Lee, Ho Jung Hwang, Jeongseok Jang, So Mi Juon, Altansukh Dorjgotov, Yong Gun Shul

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Precious metals such as platinum are commonly used in polymer-electrolyte membrane fuel cells (PEMFCs) to enhance sluggish oxygen-reduction reactions. However, agglomerations of the nano-sized platinum and corrosions of the carbon supports degrade the performance and durability of the PEMFC during the long-term operation. Here, we present a highly active and durable catalyst for the oxygen-reduction reactions by covering carbon-supported platinum with nitrogen-doped carbons as a protective layer. The PEMFC with the NC-protected Pt/C cathode shows a power density of 1.06 W cm-2 at 0.6 V in H2-O2, comparable with 0.67 W cm-2 of the PEMFC with a commercial Pt/C cathode. Furthermore, the durability is remarkably enhanced over 50%, compared with the commercial carbon-supported platinum cathode. It suggests that the nitrogen-doped carbons as a protective layer are effective in enhancing the catalytic activity for oxygen-reduction reactions and durability of the PEMFCs.

Original languageEnglish
Pages (from-to)191-198
Number of pages8
JournalElectrochimica Acta
Volume193
DOIs
Publication statusPublished - 2016 Mar 1

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Proton exchange membrane fuel cells (PEMFC)
Platinum
Carbon
Catalysts
Durability
Cathodes
Oxygen
Nitrogen
Precious metals
Catalyst activity
Agglomeration
Corrosion

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Kim, Hyeong Su ; Lee, Yeayeon ; Lee, Jin Goo ; Hwang, Ho Jung ; Jang, Jeongseok ; Juon, So Mi ; Dorjgotov, Altansukh ; Shul, Yong Gun. / Platinum catalysts protected by N-doped carbon for highly efficient and durable polymer-electrolyte membrane fuel cells. In: Electrochimica Acta. 2016 ; Vol. 193. pp. 191-198.
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Platinum catalysts protected by N-doped carbon for highly efficient and durable polymer-electrolyte membrane fuel cells. / Kim, Hyeong Su; Lee, Yeayeon; Lee, Jin Goo; Hwang, Ho Jung; Jang, Jeongseok; Juon, So Mi; Dorjgotov, Altansukh; Shul, Yong Gun.

In: Electrochimica Acta, Vol. 193, 01.03.2016, p. 191-198.

Research output: Contribution to journalArticle

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AU - Lee, Yeayeon

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AU - Juon, So Mi

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