Abstract
The gas phase electrolysis of hydrobromic acid (48 wt%) was investigated for the development of the bromine-based thermochemical hydrogen production process, by using PTFE-bonded carbon electrode. Investigation of the anodic behaviour by using a half cell showed that the electrode performance was largely affected by the type of carbon used, the fabrication pressure, the content of PTFE, and the hydrophobicity of the electrode. The anodic potential was stable for 10 h at the current density of 144 mA cm −2. The loading of Pt catalyst was very effective on the cathodic behavior. When adopted to a fuel-cell type electrolyser, the PTFE-bonded electrode showed better performance than the graphite-felt electrode; the current density of 120 mA cm −2 and HBr conversion of 45% were achieved at cell voltage of 0.80 V at 423 K.
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