Ultrathin carbon-coated amorphous/crystal heterogeneous phase NiFe alloy nanometer material and preparation method and application thereof
An alloy nanomaterial, amorphous technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that has not been used to prepare metastable amorphous/crystalline heterophase structures, etc. problems, to achieve excellent OER performance, improve electrochemical stability, and increase the effect of exposure
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Embodiment 1
[0041] A kind of preparation method of ultra-thin carbon coated amorphous / crystal heterogeneous phase NiFe alloy nanomaterial, preparation schematic diagram is as follows Figure 11 As shown, it specifically includes the following steps:
[0042] 1) Graphene oxide (GO) is prepared by the improved Hummers method, which specifically includes the following steps: firstly take 360mL of concentrated sulfuric acid, add 40mL of concentrated phosphoric acid, and then add 3g of graphite flakes. After stirring evenly, slowly add 18g of potassium permanganate, place in a stirring water bath at 50°C and heat for 12h; then, after the temperature is cooled to room temperature, add about 400mL of ice water and 10mL of hydrogen peroxide, and after settling for 3 times, pickling, ethanol, and water Neutral or so; finally dialyzed in pure water for a week to obtain graphene oxide (GO);
[0043] 2) Use graphene oxide (GO) in step 1) to prepare a GO suspension with a concentration of 2 mg / mL; so...
Embodiment 2
[0048] A method for preparing ultra-thin carbon-coated amorphous / crystalline heterogeneous phase NiFe alloy nanomaterials. The difference from Example 1 is that in step 2), the total amount of Ni and Fe metals is 4.5wt% of the GO mass.
Embodiment 3
[0050] A method for preparing ultra-thin carbon-coated amorphous / crystalline heterogeneous phase NiFe alloy nanomaterials. The difference from Example 1 is that in step 2), the total amount of Ni and Fe metals is 15 wt% of the GO mass.
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