Carbon supported silver (Ag/C) electrocatalysts for alkaline membrane fuel cells |
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Authors: | Rajangam Vinodh Dharmalingam Sangeetha |
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Affiliation: | (1) Department of Chemistry, Anna University, Chennai, 600025, Tamil Nadu, India; |
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Abstract: | This study reports on the performance of activated carbon supported silver catalyst (Ag/C) as electrocatalyst in an alkaline
membrane fuel cell (AMFC), using alkalized poly (styrene ethylene butylene poly styrene) APSEBS] as the electrolyte membrane.
Carbon supported silver catalyst (Ag/C) with different metal loading was synthesized by means of wet impregnation method.
The prepared electrocatalyst was characterized by X-ray diffraction pattern (XRD), thermogravimetric analysis (TGA), UV–Visible
diffuse reflectance spectra (DRS-UV) and Raman spectroscopy. Surface morphology analysis of the prepared electrocatalyst using
scanning electron microscopy (SEM) revealed the heterogeneous distribution of Ag on carbon support. The performance of the
prepared electrocatalyst was evaluated with a home made AMFC using a novel anion exchange membrane (APSEBS). A maximum cell
voltage and power density of 0.69 V and 109 mW/cm2, respectively, was achieved at 60 °C for the home made 10 wt% (Ag/C) cathode catalyst and anion exchange membrane. Further,
the prepared electrocatalyst was subjected to cyclic voltammetry studies to evaluate the methanol oxidation for Direct methanol
alkaline fuel cell (DMAFC) applications. |
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Keywords: | |
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