A novel electrochemical reduction system has been developed in which liquid was reduced electrochemically at a Cu electrode producing , , , and . We have succeeded in reducing with a current density of 420 mA/cm 2 and a current efficiency of 85%; the former is higher than that used in industrial electrolyses such as in the chloralkali industry. The Tafel plots indicate that the supply of is no longer limited by its mass transfer.
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Saeki et al. (1994) studied this question.
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