Preparations of Nano-MnO_x/Ti Electrocatalytic Membrane Electrode for Catalytic Oxidation of Cyclohexane Using Intermittent Electrodeposition

Authors

Xue ZHOU, 1. State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China;
Hong WANG, 1. State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China;3. Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Nankai University, Tianjin 300071, P. R. China;
Zhen YIN, 2. Chemistry and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China;
Yu-jun ZHANG, 1. State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China;
Jian-xin LI, 1. State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China;Follow
, 1. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001,Heilongjiang;

Corresponding Author

Jian-xin LI(jxli@tjpu.edu.cn)

Abstract

Cyclohexanone and cyclohexanol (KA oil) obtained from highly selective oxidation of cyclohexane (CHA) show important industrial value and application prospects. In this work, the intermittent electrodeposition was developed to prepare nano-MnO_x catalyst loading porous tubular titanium membrane electrode (MnO_x/Ti), which was employed to constitute an electro-catalytic membrane reactor (ECMR) for the oxidation of cyclohexane to produce cyclohexanol and cyclohexanone. The surface morphology, crystal structure and electrochemical property of the catalysts were characterized by FESEM, XRD and electrochemical workstation, respectively. The results show that the catalyst prepared by the intermittent electrodeposition displayed nano-flower-like γ-MnO₂. Compared with titanium membrane, the MnO_x/Ti electrocatalytic membrane exhibited better electrochemical performance and mass transfer performance. Furthermore, the ECMR was constructed by using the MnO_x/Ti electrocatalytic membrane as the anode and the stainless steel mesh as the cathode. When the initial concentration of cyclohexane was 30 mmol·L^-1, the reaction temperature was 30^oC, the residence time was 34.3 min and the current density was 2.3 mA·cm^-2. The cyclohexane conversion rate reached 25.6% and the total selectivity of KA oil exceeded 99%. Simultaneously, the ECMR with MnO_x/Ti electrode showed a good stability during the oxidation of cyclohexane.

Graphical Abstract

Keywords

intermittent electrodeposition, MnOx/Ti electrocatalytic membrane, electrocatalytic membrane reactor, cyclohexane oxidation, cyclohexanol and cyclohexanone

DOI Link

https://doi.org/10.13208/j.electrochem.190312

Publication Date

2020-06-28

Online Available Date

2019-04-25

Revised Date

2019-04-18

Received Date

2019-03-12

Recommended Citation

Xue ZHOU, Hong WANG, Zhen YIN, Yu-jun ZHANG, Jian-xin LI, . Preparations of Nano-MnO_x/Ti Electrocatalytic Membrane Electrode for Catalytic Oxidation of Cyclohexane Using Intermittent Electrodeposition[J]. Journal of Electrochemistry, 2020 , 26(3): 397-405.
DOI: 10.13208/j.electrochem.190312
Available at: https://jelectrochem.xmu.edu.cn/journal/vol26/iss3/9

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