Abstract
The electrolysis of hydrobromic acid is of interest for hybrid cycles. It is shown that the electrolysis is feasible on a laboratory scale with bipolar graphite electrodes. Graphite is actually the only practical material. The high hydrogen overvoltage of graphite can be reduced to a large extent by adding small amounts of Pd or Pt salts directly to the electrolyte. The bromine overvoltage is much lower than that for chlorine and can be neglected. The working temperature may be higher than for present day H 2O or HCl electrolysis. Under conventional conditions several kA/m 2 can be obtained below 1 V.
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