MoS_2/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  

Preparation and Electrochemical Evaluation of MoS_2/graphene as a Catalyst for Hydrogen Evolution in Microbial Electrolysis Cell

作　　者：代红艳[1,2] 杨慧敏[1] 刘宪 简选[1] 郭敏敏 曹乐乐 梁镇海[1] 

机构地区：[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

出　　处：《高等学校化学学报》2018年第2期351-358,共8页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51703151);山西省自然科学基金(批准号:201601D011023)资助~~

摘　　要：采用水热法合成了一系列MoS_2/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MoS_2/Gr电极作为微生物电解池(MEC)阴极的产氢性能.结果表明,MoS_2/Gr复合材料呈现三维层状结构,且负载在石墨烯上的MoS_2为无定形MoS_2.(NH_4)_2MoS_4和氧化石墨烯的最佳原料配比为1∶1,当滴涂量为1.5mg/cm^2时,电极的析氢催化能力最强.在MEC产氢实验中,MoS_2/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/m^2,(0.424±0.041)m^3H_2/(m^3·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,MoS_2/Gr具有良好的长期稳定性,且价格便宜,适于实际应用.A series of MoS_2/graphene（MoS_2/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 MoS_2/Gr electrode as the cathode of microbial electrolysis cell（MEC）was studied.The results showed that the MoS_2/Gr materials held a three-dimensional layered structure,and the molybdenum sulfide loaded on graphene was amorphous MoS_2.The composite prepared from 50%（mass fraction）（NH_4）_2MoS_4and 50%（mass fraction）graphene oxide with a surface density of 1.5 mg/cm^2exhibited the best catalytic activity for hydrogen evolution reaction.In the MEC tests,the MoS_2/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 MoS_2/Gr cathode MEC were（9.96±0.65）A/m^2,（0.424±0.041）m^3H_2/（m^3·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 MoS_2/Gr cathode exhibited good stability,and it was inexpensive.These advantages make it suitable for practical application.

关 键 词：二硫化钼/石墨烯 碳基电极 微生物电解池 产氢性能 

分 类 号：O646[理学—物理化学] O614[理学—化学]