Mechanism of phenol electro-oxidation in aqueous solution based on in situ infrared spectroscopy

被引：0
|
作者：
Wang J. [1 ]
Yuan T. [1 ]
Zhou D. [1 ]
Zhou X. [1 ]
Gan Y. [1 ]
机构：
[1] College of Environment, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang
来源：
Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 12期
关键词：
Electrochemical oxidation; In situ FTIR; Interface; mechanism; Phenol;
D O I：
10.11949/0438-1157.20190689
中图分类号：
学科分类号：
摘要：
The electrochemical oxidation mechanism of phenol on the surface of Pt electrode was studied by electrochemical in situ spectroscopy. In 0.1 mol/L Na2SO4 solution, the reaction potential of electrochemical oxidation of phenol on Pt electrode is +0.9-1.0 V (vs SCE), and the oxygen evolution potential is +1.3 V. In situ infrared spectroscopy showed that electrode potential had a great influence on oxidation behavior of phenol. When the potential was lower than 0.9 V, the main intermediates of phenol oxidation were dihydroxyhenzene, quinone and a few alcohols. When the potential was controlled between 0.9 V and 1.1 V, the structure of benzene ring was destroyed, and the main intermediates were ketones, acids, alcohols and CO2. According to the changes in absorption peak of functional group, phenol oxidation on the platinum electrode surface was as follows: phenol, dihydroxyhenzene, quinone, ketone, alcohol, acid and CO2. The potential of ammonia oxidation on the platinum electrode surface was + 0.5 V, which indicated that ammonia in competition with phenol oxidation in the low potential region (< 0.9 V). © All Right Reserved.
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页码：4821 / 4827
页数：6
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  • [1] Zinola C.F., Rodriguez J.L., Arevalo M.C., Et al., Electrochemical and FTIR spectroscopic studies of tyrosine oxidation at polycrystalline platinum surfaces in alkaline solutions, Journal of Solid State Electrochemistry, 12, 5, pp. 523-528, (2008)
  • [2] Jin B., Liu P., Wang Y., Et al., Rapid-scan time-resolved FT-IR spectroelectrochemistry studies on the electrochemical redox process, The Journal of Physical Chemistry B, 111, 7, pp. 1517-1522, (2007)
  • [3] Trettenhahn G., Koberl A., Anodic decomposition of citric acid on gold and stainless steel electrodes: an in situ-FTIR-spectroscopic investigation, Electrochimica Acta, 52, 7, pp. 2716-2722, (2007)
  • [4] Mao X.B., He F.Q., Zhang Y.X., Et al., Electrochemical reduction of nitrobenzene in binary ionic liquid OMImBF<sub>4</sub>/HMImPF<sub>6</sub>, CIESC Journal, 67, 5, pp. 1998-2004, (2016)
  • [5] Mousset E., Frunzo L., Esposito G., Et al., A complete phenol oxidation pathway obtained during electro-Fenton treatment and validated by a kinetic model study, Applied Catalysis B Environmental, 180, 180, pp. 189-198, (2016)
  • [6] Jiao Q.Z., Chai D.L., Bao Y.Z., Advanced oxidation technology and treatment of phenolic wastewater, Modern Chemical Industry, 33, 1, pp. 40-44, (2013)
  • [7] Cong Y.Q., Fu F.X., Ma X.J., Et al., Adsorption-electrocatalysis combined treatment of phenol wastewater and kinetics, CIESC Journal, 61, 11, pp. 2971-2977, (2010)
  • [8] Czaplicka M., Sources and transformations of chlorophenols in the natural environment, Science of the Total Environment, 322, 1-3, pp. 21-39, (2003)
  • [9] Siddiqui M., Al-Malack M.H., Phenol degradation mechanism by electrooxidation using stainless steel electrodes, Journal of Water Chemistry & Technology, 38, 1, pp. 28-33, (2016)
  • [10] Ding H.Y., Feng Y.J., Liu J.F., Electrochemical process of phenol oxidation with polycrystalline platinum electrode, Journal of Harbin Institute of Technology, 39, 10, pp. 1580-1582, (2007)
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