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设计了一种新型双室电解池,以四丁基高氯酸铵(TBAP)?碳酸丙烯酯(PC)溶液为阴极电解液,高效稳定地将CO2转化为CO.结果表明,TBAP?PC溶液的电化学窗口达?2.48 V(vs.I?/I3?),CO2可在其中发生电还原反应;阴极电流密度稳定在7.4 m A/cm2,阴极气相产物主要为CO,生成CO的电流效率最高约为93%;由于阴极电解液中含残留水,阴极表面有氢气析出,电流效率约为5%;金电极表面无吸附物,电极未失活.
A new type of two-compartment electrolytic cell was designed to efficiently and stably convert CO 2 to CO by using tetrabutyl ammonium perchlorate (TBAP) and propylene carbonate (PC) as catholyte. The results showed that TBAP-PC solution Of the electrochemical window reaches 2.48 V (vs.I? / I3?), In which the reduction reaction of CO2 occurs; the cathode current density is stabilized at 7.4 mA / cm2, the cathode gas phase product is mainly CO, the current efficiency of CO generation The maximum is about 93%. Because of the residual water in the catholyte, hydrogen is precipitated on the surface of the cathode, and the current efficiency is about 5%. There is no adsorbent on the surface of the gold electrode, and the electrode is not deactivated.