Electro-oxidation of methanol and formic acid on PtRu and PtAu for direct liquid fuel cells

Jong Ho Choi, Kyoung Jin Jeong, Yujung Dong, Jonghee Han, Tae Hoon Lim, Jae Suk Lee, Yung Eun Sung

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Abstract

The use of a PtAu catalyst as an anode catalyst for the oxidation of formic acid in direct formic acid fuel cells is described. Catalytic activities of PtAu and PtRu anodes were studied using a linear sweep voltammetry technique in a single cell configuration. PtAu showed a lower on-set potential and a larger current density than that of PtRu in formic acid oxidation. In addition, the maximum power densities at 30 °C for PtAu and PtRu were 94 and 74 mW cm-2, respectively. In order to evaluate long-term durability, the single cells were operated for hundreds of hours with a 6 M aqueous formic acid solution at 60 °C under 100 mA cm-2. The difference in performance between PtAu and PtRu after 500 h reached ca. 90 mV in direct formic acid fuel cells.

Original languageEnglish
Pages (from-to)71-75
Number of pages5
JournalJournal of Power Sources
Volume163
Issue number1 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Dec 7

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Keywords

  • Anode
  • Electrocatalyst
  • Formic acid
  • Fuel cell
  • Methanol
  • PtAu

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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