Abstract
The feasibility of a high speed zinc electrowinning cell using a Pt catalyzed hydrogen gas-diffusion electrode as an anode is investigated. This new type of zinc-winning cell is operated at a current density of 1.0 A cm−2, which is 20 times higher than usually employed in conventional methods. Current efficiency is 86% at 0.5 A cm−2 in an electrolyte containing 60 gl−1 Zn+270 gl−1 H2SO4, the zinc purity being at least 99.999%. The energy usage of the system is 1400 kWh and 380 m3 H2 gas per ton of zinc.
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Furuya, N., Mineo, N. High speed zinc electrowinning using a hydrogen gas-diffusion electrode. J Appl Electrochem 20, 475–478 (1990). https://doi.org/10.1007/BF01076059
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DOI: https://doi.org/10.1007/BF01076059