Abstract
Pt-nanowire (Pt-NW) catalyst layers were prepared by in-situ growing Pt nanowires onto carbon matrix coated on electrolyte membrane surface and used as PEMFC cathodes. The performances of the catalyst layer with various catalyst loadings and carbon matrix thicknesses were evaluated. Scanning electron microscopy (SEM) was employed to observe the morphology and thickness of the Pt-NW catalyst layers, energy-dispersive X-ray spectroscopy (EDS) was used to investigate the Pt distribution along the layers. The polarization curve, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) were performed in fuel cells to check the practical electrochemical activity of the Pt-NW catalyst layers. The results showed that the electrochemical surface area (ECSA) and the cell performance exhibited a volcano-type curve with different Pt loadings, while the carbon matrix thickness had an influence on the Pt-NW gradient distribution, the mass diffusion, and the charge transfer in the electrodes.
Original language | English |
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Pages (from-to) | 3397-3403 |
Number of pages | 7 |
Journal | International Journal of Hydrogen Energy |
Volume | 39 |
Issue number | 7 |
Early online date | 4 Jan 2014 |
DOIs | |
Publication status | Published - 25 Feb 2014 |
Keywords
- Carbon matrix
- Catalyst layer
- Catalyst loading
- Proton exchange membrane fuel cell
- Pt nanowire
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology
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Dive into the research topics of 'Controlling Pt loading and carbon matrix thickness for a high performance Pt-nanowire catalyst layer in PEMFCs'. Together they form a unique fingerprint.Prizes
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Science City Research Alliance Fellowship
Du, Shangfeng (Recipient), 2009
Prize: Fellowship awarded competitively
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