Co3O4/Ti电催化膜电极制备及其苯甲醇催化氧化性能

郑玉梅; 尹振; 王虹; 李建新

doi:10.13208/j.electrochem.170407

电化学 >

2018 , Vol. 24 >Issue 2: 122 - 128

DOI: https://doi.org/10.13208/j.electrochem.170407

研究论文

Co₃O₄/Ti电催化膜电极制备及其苯甲醇催化氧化性能

郑玉梅 ,
尹振 ,
王虹 ,
李建新

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1. 天津工业大学分离膜与膜过程国家重点实验室/分离膜科学与技术国际联合研究中心，天津 300387; 2. 天津工业大学环境与化学工程学院，天津 300387; 3. 天津工业大学材料科学与工程学院，天津 300387

收稿日期: 2017-04-07

修回日期: 2017-05-11

网络出版日期: 2017-05-12

基金资助

国家自然科学基金项目（No. 21576208, No. 21676200）、天津市应用基础与前沿技术研究计划（No. 15JCQNJC05300）及天津市科技计划项目(No. 15PTSYJC00240)资助

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Preparation of Co₃O₄/Ti Electrocatalytic Membrane Electrode for Catalytic Oxidation of Benzyl Alcohol

ZHENG Yu-mei ,
YIN Zhen ,
WANG Hong ,
LI Jian-xin

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1. State Key Laboratory of Separation Membranes and Membrane Processes/Separation Membrane Science and Technology International Joint Research Centre, Tianjin Polytechnic University, Tianjin 300387, China; 2. School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China; 3. School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China

Received date: 2017-04-07

Revised date: 2017-05-11

Online published: 2017-05-12

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摘要

本文采用浸渍涂覆法成功制备出多孔Ti负载纳米Co₃O₄电催化膜电极（Co₃O₄/Ti），以该膜电极为阳极，辅助电极为阴极，构建电催化膜反应器（electrocatalytic membrane reactor,ECMR）用于可控催化氧化苯甲醇制备苯甲醛和苯甲酸，并考察了 Co₃O₄/Ti 膜电极结构、电化学性能以及ECMR不同操作参数对苯甲醇转化率、苯甲醛和苯甲酸选择性的影响. 结果表明，负载Co₃O₄纳米颗粒可以显著提高Ti膜电极的电化学性能和催化活性. 在常温常压下，当反应物苯甲醇浓度为10 mmol·L^-1，pH为7.0，停留时间为5.0 min，电流密度为2.5 mA·cm^-2，苯甲醇的转化率达到49.8%，苯甲醛选择性为51.5%，苯甲酸选择性为23.6%.

关键词： 电催化氧化; 电催化膜反应器; 四氧化三钴; 苯甲醇氧化

本文引用格式

郑玉梅 , 尹振 , 王虹 , 李建新 . Co₃O₄/Ti电催化膜电极制备及其苯甲醇催化氧化性能[J]. 电化学, 2018 , 24(2) : 122 -128 . DOI: 10.13208/j.electrochem.170407

Abstract

The cobalt oxide(Co₃O₄) nanoparticles were loaded on microporous Ti membrane to prepare Co₃O₄/Ti electrocatalytic membrane electrode by dip-coating method. The microstructures and electrochemical properties of Co₃O₄/Ti electrocatalytic membrane were investigated. The Co₃O₄/Ti electrocatalytic membrane reactor (ECMR) assembled by using the Co₃O₄/Ti electrocatalytic membrane as an anode was adopted for catalytic oxidation of benzyl alcohol to produce benzaldehyde and benzoic acid.The effects of different operation parameters on benzyl alcohol conversion, and selectivity to benzaldehyde and benzoic acid of ECMR were studied. The results indicated that the electrochemical performance and catalytic activity of Co₃O₄/Ti membrane were improved significantly. The values of 49.8% for the conversion of benzyl alcohol, 51.5% for the selectivity to benzaldehyde and 23.6% for the selectivity to benzoic acid were obtained under the operating conditions with the benzyl alcohol concentration of 10 mmol·L^-1, pH of 7.0, residence time of 5.0 min, current density of 2.5 mA·cm^-2 at ambient temperature and pressure.

Key words： electrocatalytic oxidation; elctrocatalytic membrane reactor; cobalt oxide; benzyl alcohol oxidation

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