Recently, Wang Guoxiong, a researcher at the State Key Laboratory of Catalysis Basics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Bao Xinhe, a member of the Chinese Academy of Sciences, have made new progress in the research of high-temperature electrocatalytic reduction of CO2. Dissolution mechanism.
The solid oxide electrolysis cell (SOEC) can convert CO2 and H2O into syngas and hydrocarbon fuel at the cathode and produce high-purity O2 at the anode. It has an all-solid and modular structure, fast reaction rate, high energy efficiency and low cost And other advantages, showing great potential application prospects in CO2 conversion and renewable clean electric energy storage.
Perovskite is a widely studied SOEC cathode material, but its catalytic activity is low. Dissolving metal nanoparticles in situ at the perovskite cathode to construct a highly active metal-oxide interface can effectively improve the CO2 electrolysis performance. The reversible dissolution / dissolution of metal nanoparticles in perovskite is an effective method to solve the electrolytic performance degradation caused by particle agglomeration and carbon deposition during the long-term operation of SOEC. However, the reversible dissolution / dissolution mechanism of perovskite materials is still unclear and further research is urgently needed.
In response to the above problems, the research team studied in-situ X-ray diffraction, environmental scanning electron microscopy, scanning transmission electron microscopy and density functional theory calculations of CoFe alloy nanoparticles in Sr2Fe1.5Mo0.5O6-δ (SFMC) double perovskite In-situ dissolution / dissolution process in the mine. Under the reducing atmosphere, the easy desolubilization of Co promotes the reduction of Fe ions, forming spherical CoFe alloy nanoparticles on the surface of SFMC, with the SFMC structure changing from double perovskite to layered perovskite; when switching to an oxidizing atmosphere, The spherical CoFe alloy nanoparticles are oxidized into CoFeOx nanosheets and migrate into the interior of the perovskite. At the same time, the SFMC structure is changed from layered perovskite to double perovskite. The in-situ dissolution of CoFe alloy nanoparticles causes the SFMC cathode to exhibit significantly enhanced CO2 electrolysis performance and stability. In addition, due to the excellent regeneration ability of CoFe alloy nanoparticles, even after 12 redox cycles, the SFMC cathode can still maintain stable CO2 electrolysis performance.
Related results were published in "Advanced Materials" (Advanced Materials). This work was supported by the National Natural Science Foundation of China, the National Key R & D Program, and the Research and Innovation Fund of the Dalian Institute of Chemical Research.
PP plastic, polypropylene, commonly known as "baijiao",Scientific name: polypropylene.
Description:
PP Plastic is a kind of semi crystalline material. It is more hard than PE and has a higher melting point. Due to the high crystallinity, the surface of the material stiffness and resistance to scratch characteristics very well. PP Plastic don't have the problem of environmental stress cracking.Polypropylene (PP Plastic) is a semi-crystalline thermoplastic.PP Plastichas high impact resistance, strong mechanical properties, resistance to many organic solvents and acid and alkali corrosion.
PP Plastic is widely used in industry and is one of the most common polymer materials.
Australian COINS are also made of polypropylene.
Polypropylene bonding:
K-720 is suitable for polypropylene PP plastic adhesion, suitable for large area plate lamination, high transparency, suitable for PP adhesion PP, PP adhesive PC, PP adhesive ABS,PP adhesive PVC, PP adhesive acrylic, PP sticky metal, PP stick wood.
K-7007 adhesion performance is roughly the same as k-720, light yellow and more economical.
K-620 is adhesive small area polypropylene PP glue, must be used with the k-650 treatment agent, the instant positioning, the strength is high.
Advantages:
1. Low density;
2. Heat resistance ;
3. Non deformation;
4. High stiffness;
5. High surface strength;
6. Good chemical stability;
7. Nontoxic and safe.
Disadvantage:
The main disadvantage of the fault polypropylene is that the high temperature rigidity is not enough, and the low temperature is brittle.
Poor environmental tolerance, outdoor use, easy to turn yellow and brittle.
Tensile strength of anisotropy, the products are easy to deform, continuous use of low temperature, high creep performance, and long - term load.
Poor printing performance.
Application:
1,Valve part, drinking water and sewage water pipe,
2,Sealing element, spraying carrier,
3,Corrosion-resistant trough and barrel, industrial applications that have acid and alkali-resistant requirement; wastewater and gas discharge equipment for industrial purpose,
4,Scrubbing tower, clean room, semiconductor plant and other related industrial equipment and machinery, food machinery and chopping board,
5,Electroplating process, toy part
Combustion characteristics: PP Plastic easy to burn, polypropylene from continue to burn after the fire, with the top of the flame is yellow, the bottom made in blue, with a small amount of smoke generated, burning melt dripping, and oil.
Specification: the thickness of PP sheet material can be produced from 0.3mm to 2mm, and the PP sheet material is of rolling material and width of 500-1000mm.
The thickness of the plate can be produced from 2mm to 200mm. The specification is 600*1200mm 1000*1000mm 1000* 2000mm. Other specifications can be customized as needed,and The diameter of the PP rod can be produced from 2mm to 250mm, the length is 1 meter, PP rod can be ordered to be more than 3 meters in length.
Color: white and black, other colors can be customized
Modified varieties: PP sheet have various enhancers and other auxiliaries can be added to make modified varieties, depending on the requirements
Storage methods:
Keep in tight, cool and dry place to ensure good ventilation
Product certification: most environmental certification reports and safety reports for raw materials, such as SGS report, CTI report, UL report, MSDS safety information, etc.
PP Plastic Sheet,Polypropylene Plastic Sheet,High Hardness PP Sheet,Non Deformation PP Sheet
Dongguan Noegem Plastic Products Co.,Ltd , https://www.noegempLastic.com