SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2019, Vol. 27 ›› Issue (1): 150-156.DOI: 10.1016/j.cjche.2018.07.006

• Catalysis, kinetics and reaction engineering • Previous Articles     Next Articles

Electrochemical analysis and convection-enhanced mass transfer synergistic effect of MnOx/Ti membrane electrode for alcohol oxidation

Hong Wang1,2,3, Xin Wei1,2, Yujun Zhang1,2, Ronghua Ma1,2, Zhen Yin1,4, Jianxin Li1,2   

  1. 1 State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, China;
    2 School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
    3 Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education), Nankai University, Tianjin 300071, China;
    4 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
  • Received:2018-02-12 Revised:2018-06-25 Online:2019-01-31 Published:2019-01-28
  • Contact: Zhen Yin, Jianxin Li
  • Supported by:

    Supported by the National Natural Science Foundation of China (21676200, 21576208), the Program for Innovative Research Team in University of Ministry of Education of China (IRT-17R80) and the Science and Technology Plans of Tianjin (17JCYBJC19800), 111 Project (B12015), and College Students' Innovation and Entrepreneurship Project (201510058083).

Electrochemical analysis and convection-enhanced mass transfer synergistic effect of MnOx/Ti membrane electrode for alcohol oxidation

Hong Wang1,2,3, Xin Wei1,2, Yujun Zhang1,2, Ronghua Ma1,2, Zhen Yin1,4, Jianxin Li1,2   

  1. 1 State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, China;
    2 School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
    3 Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education), Nankai University, Tianjin 300071, China;
    4 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
  • 通讯作者: Zhen Yin, Jianxin Li
  • 基金资助:

    Supported by the National Natural Science Foundation of China (21676200, 21576208), the Program for Innovative Research Team in University of Ministry of Education of China (IRT-17R80) and the Science and Technology Plans of Tianjin (17JCYBJC19800), 111 Project (B12015), and College Students' Innovation and Entrepreneurship Project (201510058083).

Abstract: The different electrocatalytic reactors could be constructed for the electrocatalytic oxidation of 2,2,3,3-tetrafluoro-1-propanol (TFP) with two typical MnOx/Ti electrodes, i.e. the electrocatalytic membrane reactor (ECMR) with the Ti membrane electrode and the electrocatalytic reactor (ECR) with the traditional Ti plate electrode. For the electro-oxidation of TFP, the conversion with membrane electrode (70.1%) in the ECMR was 3.3 and 1.7 times higher than that of the membrane electrode without permeate flow (40.8%) in the ECMR and the plate electrode (21.5%) in the ECR, respectively. Obviously, the pore structure of membrane and convection-enhanced mass transfer in the ECMR dramatically improved the catalytic activity towards the electro-oxidation of TFP. The specific surface area of porous electrode was 2.22 m2·g-1. The surface area of plate electrode was 2.26 cm2 (1.13 cm2×2). In addition, the electrochemical results showed that the mass diffusion coefficient of the MnOx/Ti membrane electrode (1.80×10-6 cm2·s-1) could be increased to 6.87×10-6 cm2·s-1 at the certain flow rate with pump, confirming the lower resistance of mass transfer due to the convection-enhanced mass transfer during the operation of the ECMR. Hence, the porous structure and convection-enhanced mass transfer would improve the electrochemical property of the membrane electrode and the catalytic performance of the ECMR, which could give guideline for the design and application of the porous electrode and electrochemical reactor.

Key words: Electrocatalytic membrane reactor (ECMR), MnOx/Ti membrane electrode, Electro-oxidation of 2,2,3,3-tetrafluoro-1-propanol (TFP), Electrochemical reactor (ECR), Electrochemical measurement

摘要: The different electrocatalytic reactors could be constructed for the electrocatalytic oxidation of 2,2,3,3-tetrafluoro-1-propanol (TFP) with two typical MnOx/Ti electrodes, i.e. the electrocatalytic membrane reactor (ECMR) with the Ti membrane electrode and the electrocatalytic reactor (ECR) with the traditional Ti plate electrode. For the electro-oxidation of TFP, the conversion with membrane electrode (70.1%) in the ECMR was 3.3 and 1.7 times higher than that of the membrane electrode without permeate flow (40.8%) in the ECMR and the plate electrode (21.5%) in the ECR, respectively. Obviously, the pore structure of membrane and convection-enhanced mass transfer in the ECMR dramatically improved the catalytic activity towards the electro-oxidation of TFP. The specific surface area of porous electrode was 2.22 m2·g-1. The surface area of plate electrode was 2.26 cm2 (1.13 cm2×2). In addition, the electrochemical results showed that the mass diffusion coefficient of the MnOx/Ti membrane electrode (1.80×10-6 cm2·s-1) could be increased to 6.87×10-6 cm2·s-1 at the certain flow rate with pump, confirming the lower resistance of mass transfer due to the convection-enhanced mass transfer during the operation of the ECMR. Hence, the porous structure and convection-enhanced mass transfer would improve the electrochemical property of the membrane electrode and the catalytic performance of the ECMR, which could give guideline for the design and application of the porous electrode and electrochemical reactor.

关键词: Electrocatalytic membrane reactor (ECMR), MnOx/Ti membrane electrode, Electro-oxidation of 2, 2, 3, 3-tetrafluoro-1-propanol (TFP), Electrochemical reactor (ECR), Electrochemical measurement