Recent progress in engineering approach towards the design of PbO2-based electrodes for the anodic oxidation of organic pollutants

• DOI: 10.1016/j.jwpe.2021.102173
• Publication Date: 2021-06-11T13:12:15Z
• Authors: Zhengting Zhang; Guiyun Yi; Peng Li; Xikui Wang; Xiaodong Wang; Chuanxiang Zhang; Yulong Zhang
• Keywords: Overpotential; Lead dioxide; Oxygen evolution; Degradation

Abstract PbO2-based electrodes possess the greatest oxygen evolution overpotential range beside boron-doped diamond (BDD), which allowed aqueous solution electrochemical oxidization of hazardous organic contaminants. As a non-active electrode, PbO2-based electrode can generate rich free hydroxyl radicals favorable for the degradation of target pollutants. The majority of published review articles to-date focuses on the application of BDD electrodes, metal oxide (MO) electrodes or mixed metal oxide (MMO) for treatment of wastewater, however, there is an increasingly need for reasonable catalyst design of PbO2-based electrodes because suitable electrode materials fundamentally determine the electrocatalytic performance. Hence, in this review, recent advances in properties, preparation and degradation mechanism of PbO2-based electrodes are summarized, with a focus on various modifying strategies. Eventually, research gaps and future perspectives of PbO2-based electrodes are discussed.