A kind of metal organic framework compound and preparation method and application thereof
A metal-organic framework and compound technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of low platinum reserves, high cost, half-wave potential difference, etc., and achieve low cost, low performance advantages, and strong stability. sexual effect
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Embodiment 1
[0050] Example 1: Synthesis of Co-MOF:
[0051]
[0052] First, 8 mg of cobalt chloride hexahydrate was dissolved in 30 mL of water, then 9 mg of compound IV (HADQ) and a solution of 2 M sulfuric acid (15 mL) were uniformly mixed, and the solution was heated to 80 ° C, and then added 3ml of ammonia water with a concentration of 3M was diluted to obtain 20ml of aqueous solution. After the temperature was stabilized at 80°C, the temperature was kept constant for 6 hours; finally, the obtained brown-black crystals were centrifuged and washed twice in tetrahydrofuran, water, ethanol and acetone respectively. , that is, the final product Co-MOF is obtained, and the molecule is abbreviated as [Co 3 (HADQ) 2 ] n , which can be used as a new catalytic material for hydrogen fuel cell cathode with extremely high performance and stability.
[0053] 1) Elemental analysis of Co-MOF:
[0054] Table 1. Elemental composition mass percentage of Co-MOF
[0055]
[0056] Table 1 shows...
Embodiment 2
[0073] Example 2: Synthesis of Compound IV: The synthesis method of Compound IV comprises the following steps:
[0074] Step a, ethylenediamine reacts with cyclohexanone to generate compound I;
[0075] In step b, compound I uses iron powder as a catalyst to undergo substitution reaction with bromine to prepare compound II;
[0076] In step c, compound II undergoes a coupling reaction with benzophenone imine in an aprotic solvent under the action of a palladium catalyst, a phosphine ligand and an organic base to prepare compound III;
[0077] In step d, compound III is prepared to obtain compound IV; its synthetic route is:
[0078]
[0079] Each of the above synthesis steps is described in detail below:
[0080] 1) Synthesis of Compound I: Compound I (Hexahydrodipyrazino quinoxalinylene) is the key precursor for the synthesis of Co-MOF materials. The synthesis process is as follows:
[0081]
[0082] First, hexaketo cyclo-hexane (hexaketo cyclo-hexane, 0.499 g, 1.6 m...
Embodiment 3
[0095] Example 3: Synthesis of M-MOF:
[0096] The Co atoms in the MOF material are replaced by other metal atoms, such as Fe, Mn, Pt, etc., and the organic molecular framework of the MOF is the same as that of Example 1 of the present invention, which also shows excellent performance in the electrochemical oxygen reduction reaction, It can be used as a cathode for hydrogen fuel cells, and its oxygen reduction half-wave potential is comparable to that of commercial carbon-supported platinum catalysts, but its cycle charge and discharge can reach at least 20,000 times (120 hours) without any attenuation, and at the same time in an acidic environment. Shows great stability. The synthetic route of metal organic framework material M-MOF is as follows:
[0097]
[0098] Specific steps: first, dissolve metal salts in water, the metal salts are chloride salts, sulfates, nitrates, etc. in Zn, Ni, Mn, Mg, Ag, Cu, Pt or Fe; Ⅳ is evenly mixed with a sulfuric acid solution with a con...
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