Sulfated zirconium oxide as electrode and electrolyte additive for direct methanol fuel cell applications
| Autor: | Alessandra D'Epifanio, Silvia Licoccia, Alessandro Iannaci, Barbara Mecheri |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Inorganic chemistry
Energy Engineering and Power Technology chemistry.chemical_element Proton exchange membrane fuel cell Electrolyte Membrane electrode assemblies Catalysis Oxygen reduction reaction Zirconia catalysts Composite membranes Electrocatalysts Electrodes Electrolytes Electrolytic reduction Oxides Platinum Scanning electron microscopy Zirconia Zirconium alloys Carbon-cloth electrodes Composite electrolytes Direct methanol fuel cells (DMFCs) Interface stabilities Voltammetric techniques Zirconia catalysts Direct methanol fuel cells (DMFC) Direct methanol fuel cell Membrane electrode assembly Platinum-sulfated zirconia catalyst chemistry.chemical_compound Carbon-cloth electrodes Nafion Methanol fuel Zirconium alloys Renewable Energy Sustainability and the Environment Settore CHIM/07 - Fondamenti Chimici delle Tecnologie Condensed Matter Physics Fuel Technology chemistry Direct methanol fuel cells (DMFC) |
| Popis: | Sulfated zirconium oxide (S-ZrO 2 ) was used as electrode and electrolyte additive for direct methanol fuel cells (DMFCs). Composite Nafion electrolyte membranes and Pt electrocatalysts, both containing S-ZrO 2 at different content, were prepared. The morphology and catalytic activity of prepared catalysts were investigated by scanning electron microscopy, and voltammetric technique. Results indicated that Pt/S-ZrO 2 catalysts showed enhanced efficiency towards oxygen reduction reaction and increased methanol tolerance as compared to bare platinum. Pt/S-ZrO 2 -based carbon cloth electrodes were prepared and assembled as cathode in a DMFC, with Nafion/S-ZrO 2 as composite electrolyte membrane. With respect to bare platinum and Nafion, higher values of current and power density were recorded at 110 °C. The use of S-ZrO 2 both as catalyst and electrolyte additive provided enhanced membrane/electrode interface stability, as revealed by EIS spectra recorded during cell operation. |
| Databáze: | OpenAIRE |
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