Metallic nanoparticles for electrocatalytic reduction of halogenated organic compounds: A review

• Published in: Electrochimica acta Vol. 377; p. 138039
• Main Authors: Lou, Yao-Yin, Fontmorin, Jean-Marie, Amrane, A., Fourcade, F., Geneste, F.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.05.2021; Elsevier BV; Elsevier
• Subjects: Aqueous solutions; Chemical reduction; Chemical Sciences; Copper; Deposition; Electrode materials; Electrodes; Electroreduction; Halogenated organics; Nanoparticles; Organic compounds; Oxidation; Palladium; Pollutants; Selectivity; Silver; Nanoparticles; Electroreduction; Pollutants; Halogenated organics; Deposition
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2021.138039

•A review on nanoparticles-modified electrodes for reductive dehalogenation.•The 3D supports for nanoparticles are compared.•Methods to prepare and characterize nanoparticles on porous electrode support.•The influence of the electrode material on electro-dehalogenation process is discussed.•Recent applications of nanoparticles-modified electrodes to treat halogenated compounds. Increasing attention is paid to the degradation of refractory halogenated organic compounds in wastewaters. For this purpose, electrocatalytic reduction process constitutes a promising technology due to its high selectivity. Owing to their well-controlled structure and high specific surface area, nanoparticles have been the subject of many investigations in electrocatalysis. This study presents a general review on nanoparticles-modified electrodes to achieve reductive dehalogenation. The role of the electrode support, especially 3-D Carbon and metallic porous electrodes are first discussed. Then, the methods to prepare metallic nanoparticles on the electrode supports included spontaneous deposition and/or electrodeposition are summarized and the commonly used characterization methods of nanoparticles modified electrodes are also presented. The influence of the electrode material, Ag, Pd, and Cu, as representatives, on electro-dehalogenation process is discussed and compared. Finally, this review also highlights the recent applications of these nanoparticles-modified electrodes for the treatment of halogenated organic compounds in aqueous solutions.