Research On Relationship Between Aerophobic And Hydrophobic And Its Application In Electrocatalysis Gas Evolution Reaction

Energy failure has become a major problem that plagues humankind in the world today.Due to its non-renewability and low energy conversion efficiency,a traditional fossil energy source can no longer meet the growing demand for various energy-consuming systems.The search for and development of new energy storage and conversion systems that can replace primary energy sources and how to more efficiently use environmentally friendly clean energy are among the most important topics in human research.The electrolyzed water system is a kind of energy conversion system to obtain clean energy,including hydrogen evolution reaction and oxygen evolution reaction is an important part of chemical production.How to design and prepare a new type of catalyst for gas evolution reaction in a targeted way to reduce the energy consumption in the energy conversion process and increase the electrolytic efficiency is the focus of current research.At present,most of the catalysts are only focused on the research of single-function catalysts.To save costs,it is crucial to develop a new and efficient bifunctional catalyst of electrolyzing water to produce hydrogen and oxygen in a working environment.At the same time,for gas evolution reactions,most planar and powdered electrodes are also faced with a severe “bubble shielding effect”,and it is necessary to prepare a nanostructured superaerophobic electrode with high intrinsic activity and weak “bubble effect”.Many researchers simply prepare superhydrophobic electrode materials,but rarely do research on how to prepare superhydrophobic materials.In response to the above problems,this paper has studied the following two aspects:1.Test the contact angle of the liquid on the smooth sample surface,select the system with Gradual change(selection of representative values from 0 to 145°,with numerical values ranging from small to large)contact angle,and then test the contact angle of the gas on the surface of the sample under the liquid.Through the research on the relationship between the aerophobic and hydrophobic,it is concluded that: When the contact angle on a substrate is less than 65 ° ± 5 °,the gas contact angle of the substrate under the liquid has superaerophobic properties;when the liquid contact angle is greater than 65 ° ± 5 ° and less than 145 ° ± 5 °,the liquid contact angle is complementary to the gas contact angle;materials with superhydrophobic properties of micro-nanostructures have ultra-vapor-free properties.Based on the above conclusions,superaerophobic materials can be obtained by selecting a hydrophilic intrinsic material for preparing a catalyst or preparing a micro/nanostructured catalyst.2.The crystallite and stone-like Cu-Co-Mo-O micro/nano-electrodes were prepared by electrodeposition method.The electrochemical activity and gassing properties of the Cu-Co-Mo-O electrocatalysts as electrocatalyst precipitation catalysts were studied.Firstly,the Cu-Co-Mo-O precursor was obtained by electrodeposition in a acidic environment using a metallic foam nickel as a substrate,and then Cu-Co-Mo-O micro/nano electrodes were obtained by aging in an oven.The morphology and composition of the material were analyzed,and the surface topography of each process was compared.Tested the electrocatalytic HER performance,OER performance and total hydrolysis performance in alkaline environment and the superaerophobic performance of post-test sample samples in alkaline environment.The electrode can be used as a high-activity,high-stability full-water electrolytic bifunctional electrocatalyst in the future energy field...