RuO sub(2)-SiO sub(2) mixed oxides as corrosion-resistant catalyst supports for polymer electrolyte fuel cells

RuO sub(2)-SiO sub(2) mixed oxides as corrosion-resistant catalyst supports for polymer electrolyte fuel cells

The objective of this study was to evaluate the suitability of mixed oxides of silica (SiO sub(2)) and ruthenia (RuO sub(2)) for use as electrocatalyst supports in polymer electrolyte fuel cells (PEFCs). The RuO sub(2):SiO sub(2) oxides were synthesized in three different molar ratios (0.1:0.9, 0.3:...

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Veröffentlicht in:Applied catalysis. B, Environmental Environmental, 2013-07, Vol.138-139, p.43-50
Hauptverfasser: Kumar, Amod, Ramani, Vijay K
Format: Artikel
Sprache:eng
Schlagworte:
Carbon
Electrocatalysts
Electrolytes
Electronics
Fuel cells
Mixed oxides
Relative humidity
Silicon dioxide
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Zusammenfassung:The objective of this study was to evaluate the suitability of mixed oxides of silica (SiO sub(2)) and ruthenia (RuO sub(2)) for use as electrocatalyst supports in polymer electrolyte fuel cells (PEFCs). The RuO sub(2):SiO sub(2) oxides were synthesized in three different molar ratios (0.1:0.9, 0.3:0.7 and 0.5:0.5). Of these formulations, RuO sub(2)-SiO sub(2) (0.5:0.5) displayed high BET surface area ( similar to 290 m super(2) g super(-1)), high electronic conductivity (>5 S cm super(-1)), and outstanding electrochemical stability (change in double layer capacitance of
ISSN:0926-3373
DOI:10.1016/j.apcatb.2013.02.015