TY - JOUR ID - 29525 TI - Study on Electrochemical Oxidation of m-Nitrophenol on Various Electrodes Using Cyclic Voltammetry JO - Iranian Journal of Chemistry and Chemical Engineering JA - IJCCE LA - en SN - 1021-9986 AU - Duan, Xiaoyue AU - Xu, Feng AU - Wang, Yinan AU - Chang, Limin AD - Key Laboratory of Environmental Materials and Pollution Control, The Education Department of Jilin Province, Siping 136000, P.R. CHINA AD - School of Environmental Science and Engineering, Jilin Normal University, Siping 136000, P.R. CHINA AD - Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Siping 136000, P.R. CHINA Y1 - 2018 PY - 2018 VL - 37 IS - 5 SP - 129 EP - 140 KW - Electrochemical oxidation KW - Cyclic voltammetry KW - m-nitrophenol KW - Electrode material KW - pH value DO - 10.30492/ijcce.2018.29525 N2 - The electrochemical oxidation behavior of m-nitrophenol (m-NP) was studied comparatively on glassy carbon electrode, Pt electrode, PbO2 electrode, SnO2 electrode, and graphite electrode using cyclic voltammetry. The cyclic voltammetry measurements were performed in acidic (1 M H2SO4, pH 0.4), neutral (1 M Na2SO4, pH 6.8), and alkaline (1 M NaOH, pH 12.0) media to investigate the effect of pH value on the oxidation of m-NP. The fouling of electrodes was also studied during cyclic voltammetry measurements. The results indicate that both of the electrode material and the pH value of supporting electrolyte had a significant influence on the oxidation of m-NP. In acidic medium, m-NP was irreversibly oxidized on glassy carbon electrode, Pt electrode, SnO2 electrode, and graphite electrode at 1.23, 1.26, 1.26 and 1.27 V, respectively, while there was no any oxidation peak for PbO2 electrode. In a neutral medium, m-NP yielded well-defined oxidation peaks on all electrodes, although the height and potential of the peaks depended on the material of electrodes. In the alkaline medium, the m-NP could be directly oxidized only on glassy carbon electrode and graphite electrode, but their peaks were not well defined because the oxidation of m-NP occurs closer to oxygen evolution potential region. In addition, the oxidation peaks appeared at the lower potential value in the alkaline medium than in neutral and acidic media. Under all conditions, except in the alkaline solution and on glassy carbon electrode, the passivation of electrodes occurred during continual scans. UR - https://ijcce.ac.ir/article_29525.html L1 - https://ijcce.ac.ir/article_29525_133c26df2e34135d05a26014b44aa2b9.pdf ER -