SPE电极上Pt单组分及Pt-Au双组分还原态CO₂阳极剥离电化学氧化行为研究

SPE电极上Pt单组分及Pt-Au双组分还原态CO 2 阳极剥离电化学氧化行为研究 THE REDUCED CO 2 ELECTROOXIDATION ON SPE Pt AND SPE Pt Au ELECTRODES 于玉忠 Yu Yuzong 1 first-author 严河清 Yan Heqing 1 陆君涛 Lu Juntao 1 武汉大学化学学院 武汉大学化学学院 College of Chenimstry, Wuhan University College of Chenimstry, Wuhan University 采用循环伏安法，对ＳＰＥＰｔ电极以及ＳＰＥＡｕ－Ｐｔ电极上还原态ＣＯ２的电化学氧化行为研究表明，此类电极的电化学特性与光滑Ｐｔ电极一致：ＣＯ２在氢原子吸附电位区０～２５０ｍＶ（ｖｓ．ＲＨＥ）处，可与电极上化学吸附的氢反应，生成还原态的ＣＯ２，通过线性扫描，还原态ＣＯ２即发生一不可逆电化学氧化过程（阳极剥离）．在ＳＰＥＰｔ系列及ＳＰＥＡｕ－Ｐｔ系列上ＣＯ２的电化学行为表明，当ＳＰＥＰｔ系列上Ｐｔ的载量为２．５ｍＬ的０．０１ｍｏｌ·Ｌ－１Ｈ２ＰｔＣｌ６的Ｐｔ时，对还原态ＣＯ２的电催化活性最好，当Ｐｔ的载量相同时，在ＳＰＥＡｕ－Ｐｔ上，催化剂对还原态ＣＯ２的电化学氧化行为比ＳＰＥＰｔ电极更强，这是由于预先沉积的Ａｕ对后沉积的Ｐｔ有调制作用． The reduced CO 2 electrooxidation on SPE Pt and SPE Au Pt have been investigated by voltammetric methods, it is shown that the electrocharacteristics of these electrodes are simiar to smooth Pt electrodes ∶CO 2 reacts with chemisorbed hydrogen on SPE Pt and SPE Au Pt in the potential range of E =0 250 mV （vs.RHE） to form a strongly chemsorbed product of reduced CO 2, which is irreversibly stripped off the electrode by anodic linear sweep. The electroactivity of the SPE Pt electrode for the reduced CO 2 attained maximum when the deposited Pt 0.01 mol·L -1 H 2PtCl 6 2.5 mL is used, and when the same amount of the Pt is deposited on the electrodes, the electroactivity of Au Pt SPE electrode has a higher electroactivity than SPE Pt electrode because the Pt is modulated by the pre deposited Au. 固体聚合物电解质 还原态CO2 阳极剥离 solid polymer electrolyte （SPE） reduced carbon dioxide anodic stripping O646.5 1998-06-01 2021-04-01 6