Polyol synthesis of reduced graphene oxide supported platinum electrocatalysts for fuel cells

Effect of Pt precursor, support oxidation level and pH

Lee Pak Hoe, Marta Boaventura, Tiago Lagarteira, Kee Shyuan Loh, Adélio Mendes

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this work, a comprehensive study on the polyol synthesis of platinum supported on reduced graphene oxide (Pt/rGO) catalysts, including both ex-situ and in-situ characterizations of the prepared Pt/rGO catalysts, was performed. The polyol synthesis was studied considering the influence of the platinum precursor, oxidation level of graphite oxide and pH of reaction medium. The as-prepared catalysts were analyzed using thermo-gravimetric (TG) analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and cyclic voltammetry (CV). The best results in terms of platinum particle size and distribution were obtained when the synthesis was performed in acidic medium, using chloroplatinic acid as precursor and using graphene oxide with high oxidation level. The most promising graphene-supported catalyst was used to prepare a polymer electrolyte membrane fuel cell electrode. The membrane electrode assembly (MEA) prepared with graphene-based electrode was compared with a MEA prepared with catalyst based on commercial platinum supported in carbon black (Pt/C). Single cell characterization included polarization curves and in-situ electrochemical impedance spectroscopy (EIS). The graphene-based electrode presented promising albeit unstable electrochemical performance due to water management issues. Additionally, EIS measurements revealed that the MEA made with Pt/rGO catalyst presented a lower mass transport resistance than the commercial Pt/C.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusAccepted/In press - 1 Jan 2018

Fingerprint

platinum oxides
electrocatalysts
Electrocatalysts
Polyols
Graphene
fuel cells
Fuel cells
Platinum
graphene
platinum
Oxidation
oxidation
Oxides
catalysts
synthesis
Electrodes
electrodes
Catalysts
oxides
membranes

Keywords

  • Graphene-based catalyst support
  • Membrane electrode assembly
  • Platinum nanoparticles
  • Polymer electrolyte membrane fuel cell
  • Polyol reduction

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Polyol synthesis of reduced graphene oxide supported platinum electrocatalysts for fuel cells : Effect of Pt precursor, support oxidation level and pH. / Pak Hoe, Lee; Boaventura, Marta; Lagarteira, Tiago; Loh, Kee Shyuan; Mendes, Adélio.

In: International Journal of Hydrogen Energy, 01.01.2018.

Research output: Contribution to journalArticle

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AU - Loh, Kee Shyuan

AU - Mendes, Adélio

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