Abstract

We succeeded in fabricating a dental amalgam composition on a copper foam electrode and could convert CO2 selectively to formate. The formate was produced at a current efficiency of 80~100% in the wide range of the potential shown below. The remaining electricity was used only for producing H2. The concentration of the produced formate is over 1.2 M in the batch electrolysis of 30 hours operation. The CO2-to-formate conversion system built based on the electrode in 9 cm x 9 dimension is shown to be stable in continuous operation at 100 mA/cm2 for more than a month. Figure 1

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