Cr effect on the durability of Pt-TM catalysts for PEMFCs

Jungdo Kim, Eung Seok Lee, Yoon Soo Chun, Dae-Soon Lim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Pt-TM-Cr/C alloy catalysts were prepared using a polyol method to improve their durability through the addition of a small amount of Cr, which is expected to prevent dissolution of transition metals (TMs). H<inf>2</inf>PtCl<inf>6</inf>·H<inf>2</inf>O, CoCl<inf>2</inf>·6H<inf>2</inf>O, Ni(NO<inf>3</inf>)<inf>2</inf>·6H<inf>2</inf>O, and CrCl<inf>2</inf> were used as precursors. X-ray diffraction was used to determine the compositions and sizes of the prepared electrocatalysts. The average sizes of the electrocatalyst particles were estimated to be 2-4 nm using the Scherrer formula. Transmission electron microscopy observations revealed that the nanoparticles were uniformly distributed on the carbon, i.e., Vulcan XC 72. The durability of the Pt-TM-Cr/C alloy catalysts was evaluated using a cell test and the durability test. According to the cell tests, Pt-TM(Co)-Cr (67 : 23 : 10)/C alloy catalysts are more durable than Pt-TM(Co)/C alloy catalysts. The stability tests showed that Cr prevents the dissolution of transition metals, which are integral to the durability of the electrode.

Original languageEnglish
Pages (from-to)55401-55405
Number of pages5
JournalRSC Advances
Volume5
Issue number68
DOIs
Publication statusPublished - 2015

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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