Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11011607 | International Journal of Hydrogen Energy | 2018 | 11 Pages |
Abstract
In this study, hybrid (synthesized rGO and commercial carbon black (CB) in various weight ratios) supported Pt catalysts were synthesized by using the supercritical carbon dioxide deposition (scCO2) technique for PEM fuel cells. In hybrid materials, rGO to CB weight ratios were changed in between 90:10 to 50:50 which were compared to their plain materials. The physicochemical and the electrochemical characteristics of the materials were examined by using BET, XRD, TGA, TEM, contact angle and roughness measurements, CV and PEM fuel cell performance tests. All these characterizations showed that the hybrid supported Pt catalysts were successfully synthesized. TEM images of the catalysts confirmed the highly dispersed and small nanoparticle formation (1.9-2.9Â nm) via scCO2 deposition technique. Among the hybrid supported catalysts, catalyst having rGO:CB ratio of 70:30 showed the best PEM fuel cell performance. Electrochemical characterization either fuel cell performance test or CV results indicated significantly enhancement in activity with an increase in CB amount in the support.
Related Topics
Physical Sciences and Engineering
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Electrochemistry
Authors
AyÅe Bayrakçeken Yurtcan, Elif DaÅ,