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首页> 外文期刊>International Journal of Electrochemical Science >Evaluation of the Parameters Affecting the Photoelectrocatalytic Reduction of CO2 to CH3OH at Cu/Cu2O Electrode
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Evaluation of the Parameters Affecting the Photoelectrocatalytic Reduction of CO2 to CH3OH at Cu/Cu2O Electrode

机译：Cu / Cu 2 O电极上影响CO 2 光电催化还原CH 3 OH的参数的评价

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This work describes the photoeletrocatalytic reducing CO2 dissolved in slightly alkaline solution at-1Cu/Cu2O electrode prepared by electrochemical deposition of a copper foil in 12.0 mol L submitted tovoltage of -0.40 V for 30 min. The effect of supporting electrolyte was investigated and 80 ppm of- 1 methanol was generated when photoelectrolysis were performed at Cu/Cu2O electrode in 0.1 mol LNa2CO3/NaHCO3. However, this value is limited to 10 ppm in Na2CO3 and is almost neglected inNaHCO3. The bias potential also plays an important role in the formation of methanol byphotoelectrocatalysis, where is maxima at applied potential of 0.2V and nil at -0.4V. Maximumphotoconversion of CO2/CH3OH was obtained at pH 8, which is successively suppressed in an alkaline-1 medium. Thus, using the best experimental conditions of 0.1 mol L Na2CO3/NaHCO3, pH 8 , wereobtained 75 % reduction of CO2 to methanol under UV-Vis irradiation and bias potential of +0.2 V vsAg/AgCl , after 2 hours of treatment. The results illustrate that the stabilization of Cu (I) on theelectrodic material seems to be the key to success in this photoelectrochemical reaction.
机译：这项工作描述了在-1Cu / Cu2O电极上溶解于弱碱性溶液中的光电催化还原性CO2，该电极是通过将铜箔在12.0 mol L中经受-0.40 V电压30分钟的电化学沉积而制备的。研究了支持电解质的作用，当在Cu / Cu2O电极上的0.1 mol LNa2CO3 / NaHCO3中进行光电解时，产生了80 ppm-1甲醇。但是，该值在Na2CO3中被限制为10 ppm，而在NaHCO3中几乎被忽略。偏置电势在通过光电催化形成甲醇中也起着重要作用，其中在施加电势为0.2V时最大，在-0.4V时为零。在pH 8时获得了最大的CO2 / CH3OH光转化，在碱1介质中被连续抑制。因此，在处理2小时后，使用0.1 mol L Na2CO3 / NaHCO3（pH 8）的最佳实验条件在UV-Vis辐照下和+0.2 V vsAg / AgCl的偏置电势下可将CO2还原为甲醇的75％。结果表明，在电化学材料上，Cu（I）的稳定似乎是该光电化学反应成功的关键。

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