Citation: SUN Meng, LI Jing-Hong. Recent Progress on Palladium-Based Oxygen Reduction Reaction Electrodes for Water Treatment[J]. Acta Physico-Chimica Sinica, ;2017, 33(1): 198-210. doi: 10.3866/PKU.WHXB201609191
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Developing highly efficient electrode catalysts with the four-electron oxygen reduction pathway has remained a research hotspot in fuel cell research. However, the pursuit of novel electrode catalysts possessing the specific two-electron reduction route for water treatment is challenging. In this review, we focus on recent progress in electrocatalytic treatment of refractory pollutants in water by palladium (Pd)-based noble metal electrodes. We highlight:(i) the degradation and mineralization of organic pollutants through electrocatalytic oxidation derived from the combination of Fe2+ and H2O2, which can be in-situ synthesized by Pd based electrodes; (ii) electrocatalytic reduction transformation from toxic organic pollutants and inorganic salts to harmless products by Pd-based electrodes; and (iii) removal of heavy metals by redox conversion via Pd-based electrodes. The future opportunities and prospects of applying noble metal nanocatalysts in water treatment are discussed.
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