title: Fabrication and characterization of PbO2 electrode modified with [Fe(CN)6](3-) and its application on electrochemical degradation of alkali lignin.
abstract: PbO2 electrode modified by [Fe(CN)6](3-) (marked as FeCN-PbO2) was prepared by electro-deposition method and used for the electrochemical degradation of alkali lignin (AL). The surface morphology and the structure of the electrodes were characterized by scanning electronic microscopy (SEM) and X-ray diffraction (XRD), respectively. The stability and electrochemical activity of FeCN-PbO2 electrode were characterized by accelerated life test, linear sweep voltammetry, electrochemical impedance spectrum (EIS) and AL degradation. The results showed that [Fe(CN)6](3-) increased the average grain size of PbO2 and formed a compact surface coating. The service lifetime of FeCN-PbO2 electrode was 287.25 h, which was longer than that of the unmodified PbO2 electrode (100.5h). The FeCN-PbO2 electrode showed higher active surface area and higher oxygen evolution potential than that of the unmodified PbO2 electrode. In electrochemical degradation tests, the apparent kinetics coefficient of FeCN-PbO2 electrode was 0.00609 min(-1), which was higher than that of unmodified PbO2 electrode (0.00419 min(-1)). The effects of experimental parameters, such as applied current density, initial AL concentration, initial pH value and solution temperature, on electrochemical degradation of AL by FeCN-PbO2 electrode were evaluated.
authors.affiliation: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China. Electronic address: fjtes@mail.xjtu.edu.cn.
authors.forename: Xu
authors.initials: X
authors.lastname: Hao
authors.affiliation: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Quansheng
authors.affiliation: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Shao
authors.initials: S
authors.lastname: Dan
authors.affiliation: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China; The State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Honghui
authors.affiliation: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Jidong
authors.affiliation: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Jiangtao
authors.affiliation: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China; The State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China. Electronic address: yanwei@mail.xjtu.edu.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wei
mesh_terms: D004563:Electrochemistry; D004566:Electrodes; D005292:Ferricyanides / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D005292:Ferricyanides; D010087:Oxides; D014874:Water Pollutants, Chemical; C007931:hexacyanoferrate III; D007854:Lead; C047365:lead oxide; D008031:Lignin
keywords: Alkali lignin; Electrochemical characterization; Electrochemical degradation; PbO(2) electrode; [Fe(CN)(6)](3−)