When MXene (Ti3C2Tx) meet Ti/PbO2: An improved electrocatalytic activity and stability

• Published in: Journal of hazardous materials Vol. 430; p. 128440
• Main Authors: Man, Shuaishuai, Luo, Dehui, Sun, Qing, Yang, Haifeng, Bao, Hebin, Xu, Ke, Zeng, Xuzhong, He, Miao, Yin, Zehao, Wang, Li, Mo, Zhihong, Yang, Wenjing, Li, Xueming
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.05.2022
• Subjects: Basic fuchsin; Electrophoretic deposition; MXene; PbO2 electrode; Wastewater treatment; Basic fuchsin; PbO2 electrode; Wastewater treatment; MXene; Electrophoretic deposition
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2022.128440

Stable electrode materials with high catalytic activity are urgently required for electrochemical degradation of refractory organic pollutants in wastewater treatment. Herein, high conductive MXene (Ti3C2Tx) was firstly fabricated by electrophoretic deposition (EPD) as an interlayer for preparing a novel PbO2 electrode. The well-conducted Ti3C2Tx interlayer significantly improved the electrochemical performance of the EPD-2.0/PbO2 (EPD time was 2.0 min) electrode with the charge transfer resistance decreased by 9.51 times, the inner active sites increased by 5.21 times and the ∙OH radicals generation ability enhanced by 4.07 times than the control EPD-0/PbO2 anode. Consequently, the EPD-2.0/PbO2 electrode achieved nearly 100% basic fuchsin (BF) and 86.78% COD removal efficiency after 3.0 h electrolysis. Therefore, this new PbO2 electrode presented a promising potential for electrochemical degradation of BF and the new Ti3C2Tx middle layer could also be used to fabricate other efficient and stable anodes, such as SnO2, MnO2, TiO2, etc. [Display omitted] •Ti3C2Tx was firstly fabricated as an interlayer for preparing a novel PbO2 electrode.•The electrochemical performance of the modified PbO2 electrode was much improved.•Basic fuchsin was effectively decomposed and two degradation pathways were proposed.