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Monatomic nickel-nitrogen coordination co-doped porous carbon/nano-zirconia composite electrode as well as preparation method and application thereof

A nano-zirconia, composite electrode technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of weak adsorption capacity, slow conversion rate, weak adsorption capacity, etc., and achieve easy operation, excellent electrocatalytic activity and stability. Effect

Active Publication Date: 2021-09-24
QUZHOU RES INST OF ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the metal single-atom structure for electrocatalytic CO 2 The adsorption capacity of the intermediates during the reduction reaction is weak, resulting in CO 2 The conversion rate is slow, and the weak adsorption capacity will cause the catalyst to present a narrow potential window during the reaction process. In order to construct a catalyst with high activity and high selectivity, it is urgent to further introduce related materials on the basis of the single-atom structure of the metal. To stabilize the intermediates of the reaction, thereby improving the reaction efficiency

Method used

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  • Monatomic nickel-nitrogen coordination co-doped porous carbon/nano-zirconia composite electrode as well as preparation method and application thereof
  • Monatomic nickel-nitrogen coordination co-doped porous carbon/nano-zirconia composite electrode as well as preparation method and application thereof
  • Monatomic nickel-nitrogen coordination co-doped porous carbon/nano-zirconia composite electrode as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Step (1): Add 122.5mg of zirconium chloride, 130mg of 2,2-bipyridine-5,5-dicarboxylic acid and 3mL of formic acid into 50mL of N,N-dimethylformamide, stir magnetically for 10min until the mixture is uniform , hydrothermally reacted at 120°C for 24 hours, after the mixture was cooled to room temperature, centrifuged at a high speed of 10,000r / min, the filter cake was washed with N,N-dimethylformamide and acetone for 3 times, and finally the filter cake Dry in a vacuum oven at 90°C for 10 hours to obtain MOFs materials;

[0050] Step (2): Take 0.56 g of the MOFs material obtained in step (1), and add 133.1 mg of nickel chloride into 150 mL of acetonitrile, mix and stir for 24 h at room temperature at 25 ° C, then perform centrifugal washing, and wash the filter cake with acetonitrile 3 times, and finally dry the filter cake in a vacuum oven at 80°C for 12 hours to obtain a metal-organic framework in which metal nickel ions are coordinated with the nitrogen species of 2,2-...

Embodiment 2～4

[0056] As in the preparation method of Example 1, only the calcination temperature in step (3) was changed to 700°C, 800°C and 1000°C to obtain nickel-nitrogen coordination co-doped porous carbon / nano-zirconia composite electrodes at different calcination temperatures .

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Abstract

The invention belongs to the technical field of electrochemical energy conversion, and discloses a monatomic nickel-nitrogen coordination co-doped porous carbon / nano-zirconia composite electrode and a preparation method and application thereof, and the preparation method comprises the following steps: performing hydrothermal reaction to zirconium salt, 2,2-bipyridine-5,5-dicarboxylic acid and formic acid to obtain an MOFs material; and mixing the MOFs material and nickel salt in a solvent to obtain a solid, calcining the solid, and etching to remove metal nickel particles to obtain the porous carbon / nano-zirconia composite electrode. The composite electrode is applied to preparation of CO by electrocatalytic reduction of CO2, and has the advantages of high selectivity, high activity and high stability.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy conversion, and in particular relates to a single-atom nickel-nitrogen coordination co-doped porous carbon / nano zirconia composite electrode, its preparation method and application. Background technique [0002] In recent decades, due to the burning of large amounts of fossil fuels, atmospheric CO 2 The concentration of carbon dioxide has risen sharply, and problems such as energy shortage and greenhouse effect have become increasingly serious. Electrocatalytic reduction of CO 2 The technology can convert CO under the operating conditions of normal temperature and pressure 2 Direct reduction into reusable high-value-added chemicals, such as CO, methane, ethanol, etc., effectively promotes the renewable utilization of resources, so it has great research value and application prospects. However, this method is limited by the low selectivity and narrow potential window of the cataly...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B11/031C25B1/23C25B3/03C25B3/07C25B3/26
CPCC25B11/04C25B11/031C25B1/23C25B3/03C25B3/07C25B3/26
Inventor 侯阳冯少华杨彬雷乐成
Owner QUZHOU RES INST OF ZHEJIANG UNIV
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