MoS2/Y分子筛微生物电解池阴极材料制备及其电化学性能

采用水热法合成了一系列不同比例的MoS₂/Y分子筛复合物，并将其制成碳基复合电解池阴极。线性扫描伏安法（LSV）测试表明，当MoS₂和Y分子筛质量比为5∶2、碳纸负载量为1.5mg/cm²时，阴极催化析氢性能最佳。通过SEM、TEM、XRD、XPS和BET对复合材料进行表征，SEM测试表明MoS₂/Y分子筛为片状和八面体相互交织叠加的云状形貌。BET测试表明其具有排列规整的微孔-介孔多级孔道结构，利于加速H⁺还原和H₂扩散。本文还考察了以MoS₂/Y分子筛作为微生物电解池（MEC）阴极的析氢性能。在MEC运行5个周期的产氢实验中，MoS₂/Y分子筛所产生的平均最大电流密度、氢气产率和产氢量等都高于Pt电极，且具有长期稳定性。因此，MoS₂/Y分子筛是一种适于实际应用的析氢催化剂。

Preparation of MoS2/Y zeolite microbial electrolysis cell cathode material and its electrochemical properties

A series of MoS₂/Y zeolite composites with different ratios were synthesized by hydrothermal method and made into the carbon-based composite electrolytic cell cathode. The LSV test showed that when the mass ratio of MoS₂ and Y zeolite was 5∶2 and the carbon paper loading was 1.5mg/cm², the cathodic hydrogen evolution performance was the best. The composites were characterized by SEM, TEM, XRD, XPS and BET. SEM testing indicated that the MoS₂/Y zeolite was a cloud-like morphology in which sheets and octahedrons were interwoven and superimposed. BET testing showed that it had a well-arranged micropore-mesoporous multi-level channel structure, which was beneficial to accelerate H⁺ reduction and H₂ diffusion. The hydrogen evolution performance of MoS₂/Y zeolite as the cathode of microbial electrolysis cell (MEC) was investigated. In the five-cycle hydrogen production experiment of MEC, the average maximum current density, hydrogen production rate and hydrogen production of MoS₂/Y zeolite were higher than that of Pt electrode, and had long-term stability. Therefore, MoS₂/Y zeolite was a suitable hydrogen evolution catalyst.