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

Shuaishuai Man; Dehui Luo; Qing Sun; Haifeng Yang; Hebin Bao; Ke Xu; Xuzhong Zeng; Miao He; Zehao Yin; Li Wang; Zhihong Mo; Wenjing Yang; Xueming Li

doi:10.1016/j.jhazmat.2022.128440

When MXene (Ti₃C₂T_x) meet Ti/PbO₂: An improved electrocatalytic activity and stability

J Hazard Mater. 2022 May 15:430:128440. doi: 10.1016/j.jhazmat.2022.128440. Epub 2022 Feb 7.

Authors

Shuaishuai Man¹, Dehui Luo¹, Qing Sun¹, Haifeng Yang¹, Hebin Bao², Ke Xu³, Xuzhong Zeng¹, Miao He¹, Zehao Yin¹, Li Wang⁴, Zhihong Mo¹, Wenjing Yang⁵, Xueming Li⁶

Affiliations

¹ College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China.
² College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China; Fundamental Studies department, Army logistics University of PLA, Chongqing 401311, PR China.
³ Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, PR China.
⁴ College of Power Engineering, Chongqing Electric Power College, Chongqing 400053, PR China.
⁵ College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China. Electronic address: yangwj308@163.com.
⁶ College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China. Electronic address: xuemingli@cqu.edu.cn.

PMID: 35158250
DOI: 10.1016/j.jhazmat.2022.128440

Abstract

Stable electrode materials with high catalytic activity are urgently required for electrochemical degradation of refractory organic pollutants in wastewater treatment. Herein, high conductive MXene (Ti₃C₂T_x) was firstly fabricated by electrophoretic deposition (EPD) as an interlayer for preparing a novel PbO₂ electrode. The well-conducted Ti₃C₂T_x 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 Ti₃C₂T_x middle layer could also be used to fabricate other efficient and stable anodes, such as SnO₂, MnO₂, TiO₂, etc.

Keywords: Basic fuchsin; Electrophoretic deposition; MXene; PbO(2) electrode; Wastewater treatment.