Effect of Platinum Particle Size and Oxygen Pressure on Activity of Platinum/Carbon Gas Diffusion Electrodes in High Temperature Acid Medium

Jing Tang; Hui Min Meng; Xuan Liang

doi:10.4028/www.scientific.net/MSF.859.169

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HomeMaterials Science ForumMaterials Science Forum Vol. 859Effect of Platinum Particle Size and Oxygen...

Effect of Platinum Particle Size and Oxygen Pressure on Activity of Platinum/Carbon Gas Diffusion Electrodes in High Temperature Acid Medium

Abstract:

The Platinum/Carbon (Pt/C) gas diffusion electrode was used as cathode instead of the traditional electrode for energy saving electrodeposition of manganese dioxide (MnO₂). This paper studies Pt particle size and oxygen pressure (P_O₂) effect on activity of Pt/C gas diffusion electrodes in high temperature acid medium. The Pt nanoparticles evenly distributed on the carbon black surface except the Pt/C-4 and the diameters of the Pt particles size are different (Pt/C-1, Pt/C-2, Pt/C-3, Pt/C-4). The particle sizes of the Pt/C-1, Pt/C-2, Pt/C-3, Pt/C-4 are about 1.6 nm, 2.02 nm, 3.0 nm and 9 nm, respectively. When the loading amount of Pt is the same, the electrode performance of the Pt/C-3 gas-diffusion cathode is better than that of the Pt/C-1, Pt/C-2 and Pt/C-4 gas-diffusion cathode. The open circuit potential, oxygen reduction current of the Pt/C gas diffusion electrode increase with increasing oxygen pressure.

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Materials Science Forum (Volume 859)

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169-174

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https://doi.org/10.4028/www.scientific.net/MSF.859.169

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May 2016

Authors:

Jing Tang, Hui Min Meng*, Xuan Liang

Keywords:

Activity, Electrodeposition of Manganese Dioxide, Pt Particle Size, Pt/C Gas Diffusion Electrodes

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