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Reparation and Electrochemical Performance of Acetylene Black-Doped Ti-PbO2 Electrode with High Electron Transfer Rate
ECS Journal of Solid State Science and Technology ( IF 1.8 ) Pub Date : 2020-12-31 , DOI: 10.1149/2162-8777/abd224
Junze Zhang , Hongning Wang , Ruoyu Chen

During the electrochemical preparation process, the electron transport rate in the PbO2 active layer could be greatly increased resulting from reduction in the oxidation of the Ti substrate, which effectively improved the service life and catalytic degradation efficiency of the PbO2 Dimension Stable Anode (PbO2 DSA) electrode. Through adding nano-acetylene black (ACET) and polyvinyl pyrrolidone (PVP) into the plating solution, an ACET doped Ti/PbO2 electrode was successfully prepared via an anodic oxidation method. Results of field emission scanning electron microscope (FESEM), diffraction of X-rays (XRD), transmission Electron Microscope(TEM) and X-ray photoelectron spectroscopy (XPS) characterization indicated that 2.10 ∼ 2.75 wt% of ACET doping amount hardly changed the morphology and lattice constant of the PbO2 electrode. With electrochemical alternating current impedance spectroscopy (EIS) and cyclic voltammetry (CV), it confirmed that ACET reduced the charge transfer impedance (Rct) of the PbO2 electrode up to 95%, and restrained the potential of oxygen evolution reaction(OER). With the increase of electron transport rate, the generation rate of hydroxyl radicals (OH) on the electrode surface was enhanced significantly. Compared with the Ti/PbO2 electrode, the ACET-doped Ti/PbO2 electrode exhibited higher electrocatalytic efficiency to phenol degradation. During the degradation process, the consumption of time and energy could be reduced by 33% and 34%, respectively. At the same current density, the required voltage for preparing the ACET-modified Ti/PbO2 electrode was much lower. In the assistant of lower deposition voltage, the ACET-doped Ti/PbO2 electrode possessed a stronger binding force to Ti substrate, and meanwhile obtained a longer lifespan.



中文翻译:

高电子转移率乙炔黑掺杂Ti-PbO 2电极的制备及电化学性能

在电化学制备过程中,由于减少了Ti衬底的氧化,可以大大提高PbO 2活性层中的电子传输速率,从而有效地提高了PbO 2尺寸稳定阳极(PbO)的使用寿命和催化降解效率。2 DSA)电极。通过将纳米乙炔黑(ACET)和聚乙烯吡咯烷酮(PVP)添加到电镀液中,掺杂了ACET的Ti / PbO 2通过阳极氧化方法成功制备了电极。场发射扫描电子显微镜(FESEM),X射线衍射(XRD),透射电子显微镜(TEM)和X射线光电子能谱(XPS)的表征结果表明,ACET掺杂量的2.10〜2.75 wt%几乎不变。 PbO 2电极的形貌和晶格常数。通过电化学交流阻抗谱(EIS)和循环伏安法(CV),可以确定ACET降低了PbO 2的电荷转移阻抗(Rct)。电极高达95%,并抑制了氧气析出反应(OER)的电位。随着电子传输速率的增加,电极表面羟基自由基(OH)的生成速率显着提高。与Ti / PbO 2电极相比,掺杂ACET的Ti / PbO 2电极对苯酚的降解具有更高的电催化效率。在降解过程中,时间和能源的消耗可以分别减少33%和34%。在相同的电流密度下,制备ACET改性的Ti / PbO 2电极所需的电压要低得多。在较低沉积电压的辅助下,掺有ACET的Ti / PbO 2 电极对钛基体具有较强的结合力,使用寿命更长。

更新日期:2020-12-31
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