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|Title:||Pt/CNT-based electrodes with high electrochemical activity and stability for proton exchange membrane fuel cells|
|Authors:||Tang, Z. |
|Source:||Tang, Z., Ng, H.Y., Lin, J., Wee, A.T.S., Chua, D.H.C. (2010). Pt/CNT-based electrodes with high electrochemical activity and stability for proton exchange membrane fuel cells. Journal of the Electrochemical Society 157 (2) : B245-B250. ScholarBank@NUS Repository. https://doi.org/10.1149/1.3266933|
|Abstract:||An integrated platinum/carbon nanotube (CNT)-based electrode for proton exchange membrane fuel cells has been efficiently fabricated by the in situ growth of a CNT layer onto carbon paper and by a subsequent direct sputter deposition of a Pt catalyst. Scanning electron microscopy and Raman spectroscopy demonstrated that the CNTs directly grown onto carbon paper formed a dense CNT layer with high surface roughness and porosity. Transmission electron microscopy micrographs indicated that this Pt/CNT composite catalyst consists of numerous Pt nanoparticles that are uniformly dispersed on the CNT surface without any surface oxidation treatment. X-ray photoelectron spectroscopy analysis revealed that the sputter-deposited Pt catalysts are mainly in a pure metallic state with an extremely low oxide formation. Compared with the carbon-black-based electrode with commercial Pt/VXC72R catalysts, the Pt/CNT/carbon-paper-based electrode has shown a pronounced improvement in electrochemical activity and stability, verified by polarization performance tests and in situ accelerated degradation tests. In situ cyclic voltammetry measurements further confirmed that the integrated Pt/CNT catalyst could give rise to a higher Pt utilization and a better corrosion resistance at the cathode. © 2009 The Electrochemical Society.|
|Source Title:||Journal of the Electrochemical Society|
|Appears in Collections:||Staff Publications|
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