Investigation of carbon-supported Pt nanocatalyst preparation by the polyol process for fuel cell applications

Hyung Suk Oh, Jong Gil Oh, Youn Gi Hong, Hansung Kim

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

Parametric investigation of the polyol process for the preparation of carbon-supported Pt nanoparticles as catalysts for fuel cells was carried out. It was found that the concentration of glycolate anion, which is a function of pH, plays an important role in controlling Pt particle size and loading on carbon. It was observed that Pt loading decreased with increasing alkalinity of the solution. As evidenced by zeta potential measurement, this was mainly due to poor adsorption or repulsive forces between the metal colloids and the supports. In order to modify the conventional polyol process, the effect of the gas purging conditions on the characteristics of Pt/C was examined. By the optimization of the gas environment during the reaction, it was possible to obtain high loading of 39.5 wt% with a 2.8 nm size of Pt particle. From the single cell test, it was found that operating in ambient O2 at 70 °C can deliver high performance of more than 0.6 V at 1.44 A cm-2.

Original languageEnglish
Pages (from-to)7278-7285
Number of pages8
JournalElectrochimica Acta
Volume52
Issue number25
DOIs
Publication statusPublished - 2007 Sep 1

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Polyols
Fuel cells
Carbon
glycolic acid
Gases
Purging
Colloids
Zeta potential
Alkalinity
Anions
Negative ions
Metals
Particle size
Nanoparticles
Adsorption
Catalysts
polyol

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

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abstract = "Parametric investigation of the polyol process for the preparation of carbon-supported Pt nanoparticles as catalysts for fuel cells was carried out. It was found that the concentration of glycolate anion, which is a function of pH, plays an important role in controlling Pt particle size and loading on carbon. It was observed that Pt loading decreased with increasing alkalinity of the solution. As evidenced by zeta potential measurement, this was mainly due to poor adsorption or repulsive forces between the metal colloids and the supports. In order to modify the conventional polyol process, the effect of the gas purging conditions on the characteristics of Pt/C was examined. By the optimization of the gas environment during the reaction, it was possible to obtain high loading of 39.5 wt{\%} with a 2.8 nm size of Pt particle. From the single cell test, it was found that operating in ambient O2 at 70 °C can deliver high performance of more than 0.6 V at 1.44 A cm-2.",
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Investigation of carbon-supported Pt nanocatalyst preparation by the polyol process for fuel cell applications. / Oh, Hyung Suk; Oh, Jong Gil; Hong, Youn Gi; Kim, Hansung.

In: Electrochimica Acta, Vol. 52, No. 25, 01.09.2007, p. 7278-7285.

Research output: Contribution to journalArticle

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AB - Parametric investigation of the polyol process for the preparation of carbon-supported Pt nanoparticles as catalysts for fuel cells was carried out. It was found that the concentration of glycolate anion, which is a function of pH, plays an important role in controlling Pt particle size and loading on carbon. It was observed that Pt loading decreased with increasing alkalinity of the solution. As evidenced by zeta potential measurement, this was mainly due to poor adsorption or repulsive forces between the metal colloids and the supports. In order to modify the conventional polyol process, the effect of the gas purging conditions on the characteristics of Pt/C was examined. By the optimization of the gas environment during the reaction, it was possible to obtain high loading of 39.5 wt% with a 2.8 nm size of Pt particle. From the single cell test, it was found that operating in ambient O2 at 70 °C can deliver high performance of more than 0.6 V at 1.44 A cm-2.

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