高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (2): 351.doi: 10.7503/cjcu20170255

• 物理化学 • 上一篇    下一篇

MoS2/石墨烯复合阴极材料的制备及微生物电解池催化产氢性能

代红艳1,2, 杨慧敏1, 刘宪3, 简选1, 郭敏敏1, 曹乐乐1, 梁镇海1()   

  1. 1. 太原理工大学化学化工学院, 太原 030024
    2. 太原学院市政与环境工程系, 太原 030032
    3. 太原师范学院化学系, 太原 030031
  • 收稿日期:2017-04-21 出版日期:2018-02-10 发布日期:2017-12-23
  • 作者简介:联系人简介: 梁镇海, 男, 博士, 教授, 博士生导师, 主要从事应用电化学方面的研究. E-mail: liangzhenh@sina.com
  • 基金资助:
    国家自然科学基金(批准号: 51703151)和山西省自然科学基金(批准号: 201601D011023)资助

Preparation and Electrochemical Evaluation of MoS2/graphene as a Catalyst for Hydrogen Evolution in Microbial Electrolysis Cell

DAI Hongyan1,2, YANG Huimin1, LIU Xian3, JIAN Xuan1, GUO Minmin1, CAO Lele1, LIANG Zhenhai1,*()   

  1. 1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
    2. Department of Municipal and Environmental Engineering, Taiyuan College, Taiyuan 030032, China
    3. Department of Chemistry, Taiyuan Normal University, Taiyuan 030031, China
  • Received:2017-04-21 Online:2018-02-10 Published:2017-12-23
  • Contact: LIANG Zhenhai E-mail:liangzhenh@sina.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51703151) and the Natural Science Fund of Shanxi Province, China(No.201601D011023)

摘要:

采用水热法合成了一系列MoS2/石墨烯(Gr)复合物, 并制成碳基复合电极. 利用扫描电子显微镜、 透射电子显微镜、 线性扫描伏安法等手段对材料进行表征, 研究了MoS2/Gr电极作为微生物电解池(MEC)阴极的产氢性能. 结果表明, MoS2/Gr复合材料呈现三维层状结构, 且负载在石墨烯上的MoS2为无定形MoS2. (NH4)2MoS4和氧化石墨烯的最佳原料配比为1∶1, 当滴涂量为1.5 mg/cm2时, 电极的析氢催化能力最强. 在MEC产氢实验中, MoS2/Gr阴极MEC的平均产氢电流密度、 产氢率、 库仑效率、 氢气回收率和阴极氢气回收率分别为(9.96±0.65) A/m2, (0.424±0.041) m3H2/(m3·d), (89.11±5.87)%, (70.47±6.78)%和(78.86±2.49)%, 均高于Pt/C阴极MEC; 其能量回收率也与后者相媲美. 另外, MoS2/Gr具有良好的长期稳定性, 且价格便宜, 适于实际应用.

关键词: 二硫化钼/石墨烯, 碳基电极, 微生物电解池, 产氢性能

Abstract:

A series of MoS2/graphene(MoS2/Gr) composites was prepared via simple hydrothermal method, and loaded on the carbon-based electrode. The as-prepared samples were characterized by scanning electron microscopy, transmission electron microscopy, linear sweep voltammetry, and so on. The hydrogen evolution performance of MoS2/Gr electrode as the cathode of microbial electrolysis cell(MEC) was studied. The results showed that the MoS2/Gr materials held a three-dimensional layered structure, and the molybdenum sulfide loaded on graphene was amorphous MoS2. The composite prepared from 50%(mass fraction) (NH4)2MoS4 and 50%(mass fraction) graphene oxide with a surface density of 1.5 mg/cm2 exhibited the best catalytic activity for hydrogen evolution reaction. In the MEC tests, the MoS2/Gr cathode was comparable with the Pt/C cathode in term of energy efficiency. The average current density of hydrogen production, hydrogen production rate, coulomb efficiency, hydrogen recovery and cathodic hydrogen recovery obtained with MoS2/Gr cathode MEC were (9.96±0.65) A/m2, (0.424±0.041) m3H2/(m3·d), (89.11±5.87)%, (70.47±6.78)% and (78.86±2.49)%, respectively, higher than those obtained with the Pt/C cathode MEC. In addition, the MoS2/Gr cathode exhibited good stability, and it was inexpensive. These advantages make it suitable for practical application.

Key words: MoS2/graphene, Carbon-based electrode, Microbial electrolysis cell, Hydrogen production

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