Preparation method for cobalt-nickel bimetal metaphosphate nanometer array loaded on carbon cloth substrate
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A metaphosphate and nano-array technology, applied in chemical instruments and methods, electrodes, electrolysis processes, etc., can solve the problems of anode catalyst stability and low catalytic activity, high cost of noble metals and their oxides, and achieve excellent catalytic stability , Facilitate rapid release and optimize the effect of electronic structure
Active Publication Date: 2019-08-16
HARBIN INST OF TECH
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[0003] The present invention solves the technical problems of low stability and catalytic activity of existing anode catalysts, and the high cost of noble metals and their oxides, and provides a Co 2-x Ni x P 4 o 12 -Preparation method of C nanoarray
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specific Embodiment approach 1
[0058] Embodiment 1: In this embodiment, a Co supported on a carbon cloth substrate 2-x Ni x P 4 O 12 -The preparation method of C nanoarrays is carried out according to the following steps:
[0059] 1. The carbon cloth was ultrasonically washed in acetone, ethanol and aqueous solution in turn, and then washed in concentrated HNO 3 Medium ultrasonic washing, then washing with water, and drying to obtain the treated carbon cloth;
[0060] Second, the Co(NO 3 ) 2 ·6H 2 O and Ni (NO 3 ) 2 ·6H 2 Disperse O into deionized water, stir evenly with magnetic force, mark as solution A; disperse 2-methylimidazole in deionized water, mark as solution B, under continuous magnetic stirring, pour solution B into solution A, stir , the obtained mixed solution is marked as solution C;
[0061] 3. Immerse the carbon cloth treated in step 1 into the solution C obtained in step 2, stir continuously for 2-6 hours at room temperature, then take out the carbon cloth, wash it with deionize...
specific Embodiment approach 2
[0067] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the concentration of HNO 3 Medium ultrasonic washing 4 ~ 4.5h. Others are the same as the first embodiment.
specific Embodiment approach 3
[0068] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that: in step 2, the Co(NO) in solution A 3 ) 2 ·6H 2 The concentration of O is 25 to 50 mmol / L. Others are the same as in the first or second embodiment.
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Abstract
The invention relates to a preparation method for a cobalt-nickel bimetal metaphosphate nanometer array loaded on a carbon cloth substrate, and relates to the field of preparation methods for bimetalmetaphosphate modified carbon nanometer composite materials. The invention is to solve the technical problems of low stability and catalytic activity for a conventional anode catalyst and high cost for noble metals and oxides of the noble metals. The preparation method comprises the following steps: allowing Co-based bimetallic MOFs to uniformly grow on a conductive carbon cloth through a co-precipitation method so as to obtain a CoNi(n)-ZIF nanometer array, and subjecting the CoNi(n)-ZIF nanometer array to a low-temperature solid-phase phosphorylation reaction so as to obtain a Co<2-x>NixP4O<12->C nanometer array catalyst. The catalyst provided by the invention is a non-noble metal catalyst, reduces the cost of a reaction and has good catalytic activity to oxygen evolution. The material prepared by using the method provided by the invention is used in an oxygen evolution reaction through water electrolysis.
Description
technical field [0001] The invention relates to the field of preparation methods of bimetallic metaphosphate modified carbon nanocomposite materials. Background technique [0002] In today's society, human development is closely related to energy. In the past two centuries, human energy supply has mainly relied on non-renewable fossil fuels such as oil and natural gas. However, with the depletion of consumable energy such as oil and coal, and the many environmental problems caused by burning fossil fuels, such as global warming, air and water pollution, it is urgent to find a new type of green and recyclable energy. Among many energy sources, hydrogen energy stands out. It has the advantages of high combustion calorific value, non-polluting combustion, abundant raw materials, convenient storage and transportation, etc. It is a highly competitive clean energy. Among various hydrogen production methods, electrolysis of water for hydrogen production is the most ideal hydrogen...
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