Preparation of Pulsed Electrodeposited Platinum Catalyst Layer on Novel Single-Layer Gas Diffusion Electrode for Proton Exchange Membrane Fuel Cell

• Main Authors: Chung-Ching Wu, 吳忠慶
• Other Authors: Yui-Whei Chen-Yang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/t359ym

碩士 === 中原大學 === 奈米科技碩士學位學程 === 99 === A novel Platinum catalyst (PC) deposited single layer gas duffusion electrode (SL-GDEs), which is different from the multi-layer structure of traditional electrode, was successfully prepared by the electrodeposition (ED) method. The morphology, particle size, crystallization and electrocatalytic activity of the PC layer prepared with different deposition parameters were characterized by SEM, XRD and cyclic voltammetry, respectively. The performances of the membrane electrode assemblys (MEAs) fabricated by the SL-GDEs with various amount of PC and Nafion® NRE-212 were measured by a home-made single cell test instrument。 The results showed that the better electrocatalytic activities, crystallization and electrochemical active surface area (EAS) of PC layers were obtained by the pulse electrodeposition method. The pulse current density of 200 mAcm-2, Ton/Toff = 0.001/0.005s and Charge density of 1Ccm-2 was the optimum parameter (200PA1-2). The MEA, M200PA1-2, was fabricated by the electrode of 200PA1-2 deposited SL-GDEs with Pt loading of 0.04 mgcm-2 and Nafion® NRE-212. The single cell test of M200PA1-2 with H2/O2 gases showed that the best currents and power densities at 0.4 V were 200 mAcm-2 and 79 mWcm-2, respectively. The Platinum mass specific power was 988 Wg-1, which was 136% and 168% higher than the values obtained from the PC of catalysts coated SL-GDEs and commercial carbon paper (GDE-600), respectively.