Porous CoNi-coated carbon microtube H2O2 electrooxidation electrode prepared from sonchus oleraceus flower template

Abstract

The invention provides a porous CoNi-coated carbon microtube H2O2 electrooxidation electrode prepared from a cichorium endivia flower template, which is prepared by the steps of cleaning sonchus oleraceus flowers with acetone and deionized water for several times to remove impurities, and drying for later use; soaking the sonchus oleraceus flowers in a NaClO2 aqueous solution, boiling at the temperature of 80 DEG C for 10 hours, and then carrying out suction filtration and drying; weighing Co (NO3)2.6 H2O and Ni(NO3)2.6H2O, and dissolving in deionized water; soaking the treated sonchus oleraceus flowers in the solution, stirring for 6 hours at room temperature, and then putting into a drying oven until the solvent is completely evaporated to obtain a CoNi microtube precursor; and putting the impregnated and dried precursor into a crucible, and calcining in an argon atmosphere to finally obtain the porous CoNi-coated carbon microtube H2O2 electrooxidation electrode. According to the method, the defects of low H2O2 electrooxidation rate and large concentration polarization are overcome, and the problem that the utilization rate of H2O2 is reduced due to the fact that O2 generated by self-decomposition reaction escapes from the surface of the electrode is solved.

Description

technical field [0001] The invention relates to an electro-oxidation electrode, in particular to a porous CoNi-coated carbon microtube H2O2 electro-oxidation electrode prepared by a chicory cauliflower template. Background technique [0002] H2O2 can not only be used as the oxidant of the battery, but also can undergo electrochemical oxidation reaction and be oxidized to generate oxygen, which can be directly used as a battery fuel by utilizing its energy storage characteristics. Hydrogen peroxide (H2O2), as a liquid fuel and oxidant, largely solves the problems of storage and transportation of raw materials required for fuel cells. Therefore, direct hydrogen peroxide fuel cell has great development prospects as a new type of fuel cell. Compared with other types of direct liquid fuel cells such as direct sodium borohydride fuel cells, DPPFC also has the following advantages: ① Since the oxidant and fuel are both H2O2, there is no "breakthrough" phenomenon, that is, it is no...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for electrooxidizing H2O2 by porous CoNi-coated carbon microtubes prepared by chicory cauliflower template, which makes up for the shortcomings of slow electrooxidation rate of H2O2 and large concentration polarization, and solves the problem of self-decomposition reaction to generate O2 Escaping from the electrode surface leads to problems such as reduced utilization of H2O2