| Excessive consumption of fossil fuel and environmental pollution has become the two major problems facing the world today. Water electrolysis for hydrogen production has become the most attention technologies, because it not only solve the problem of renewable energy to generate electricity is not easy to store, but also can large-scale use of the most earth abundance of water resources to produce clean, renewable and non-polluting hydrogen. Considering the high overpotential makes the high power consumption during the process of hydrogen production by water electrolysis, the research of cathode material with low over-potential is becoming a hot research topic. Noble metal(especially Pt) is well-known for its superior electrocatalytic property in the HER, while large scale application of Pt is highly limited due to its high price and global low availability. Taking these factors into accounts, we focus on the design and synthesis of no-noble cathode materials with high efficient of hydrogen evolution reaction(HER).Recently, MoS2 has been regarded as a promising substitute for traditional Pt-group metals in the HER. However, the limitation of active edges(MoS2 edge structure is considered to be the actual active site), electrical conductivity, which is attributed to the lateral transfer of electrons along the lamella structure of MoS2 nanosheets has hindered the widespread use of MoS2-based catalysts for the efficient evolution of hydrogen. Therefore, design the synthesis of highly active, high stability of molybdenum disulfide cathode material is one of the hottest topics at present. The research contents of this thesis mainly include the following three parts.1:The composite of Cu nanoparticles(Cu NPs) and MoS2 nanoflowers(MoS2 NFs) on the reduced graphene oxide(rGO)(Cu-MoS2/rGO) with high catalytic activity toward HER was easily synthesized using hydrothermal method and chemical process. And the HER properties have been studied by electrochemical experiments.2: the hybrid material of MoS2-coated Cu loaded on the multi-walled carbon nanotubes(MWCNTs@Cu@MoS2) was synthesized using chemical process and hydrothermal method. And the catalyst exhibited excellent HER activity.3: The MoS2 quantum dots(MoS2 QDs) decorated on reduced graphene oxide(RGO) synthesized by a facile sonication method as highly effective electrocatalysts for the hydrogen evolution reactionElectrochemical experiments demonstrated that the above catalyst exhibited superior HER activity(large cathode currents, small onset potential and Tafel slope value), achieving high stability simultaneously. These works open up possibilities for preparing non-noble metal electrocatalysts. |
