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Application of heteroatom-doped porous carbon coated cuprous phosphide composite catalyst

A technology of cuprous phosphide and porous carbon, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of less research, achieve good mass transfer channels, improve electrocatalytic activity, The effect of a large contact area

Active Publication Date: 2018-02-16
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, heteroatom-doped porous carbon materials loaded with excessive metal phosphides have been reported to have strong catalytic activity in the fields of electrocatalytic water splitting, but there are still relatively few studies in the fields of electrocatalytic oxygen reduction and zinc-air batteries.

Method used

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  • Application of heteroatom-doped porous carbon coated cuprous phosphide composite catalyst
  • Application of heteroatom-doped porous carbon coated cuprous phosphide composite catalyst
  • Application of heteroatom-doped porous carbon coated cuprous phosphide composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Synthesis of heteroatom-doped porous carbon material coated cuprous phosphide composite catalyst.

[0037] (1) Dissolve 0.52 g of copper nitrate, 0.55 g of hydroxyethylidene diphosphonic acid and 0.16 g of pyrazine in 20 mL of deionized water, and add sodium hydroxide to the above solution to adjust the pH of the system to 3. Then stirred and refluxed at 140° C. for 6 h to obtain a blue turbid solution. After filtering, washing with water until the filtrate is neutral, the precursor (Cu-NPMOF) blue solid powder is obtained after vacuum drying.

[0038] (2) Put 200 mg of the blue solid powder obtained in step (1) into a quartz boat, place the quartz boat in a tube furnace, and first pass nitrogen gas for 30 minutes to remove the air in the furnace, and then under a nitrogen atmosphere, the tube furnace starts The temperature was raised to 650°C at a rate of 10°C / min, and calcined at a constant temperature of 650°C for 4h. Naturally cooled to room temperature...

Embodiment 2

[0040] Example 2: The performance test of the heteroatom-doped porous carbon-coated cuprous phosphide composite material prepared by the present invention as an electrocatalyst.

[0041] 2mg of the present invention Cu 3 The P@NPPC catalyst was added to a mixed solution of 400uL ethanol and 80uL deionized water, 20uL of 5% Nafion solution by mass percentage was added, and a uniformly dispersed catalyst slurry was obtained after ultrasonic dispersion for 30min. 10 uL of the slurry was drop coated on the rotating disk electrode and dried at room temperature. The electrocatalytic performance test adopts a three-electrode system, with silver-silver chloride (Ag / AgCl) electrode as the reference electrode, platinum wire as the auxiliary electrode, 0.1mol L -1 Potassium hydroxide aqueous solution is the electrolytic solution. The test instrument is a constant potential / current meter of Wavedriver10 from Pine Company, and an MSR rotating disk electrode device.

[0042] like Figur...

Embodiment 3

[0046] Example 3: Application of the heteroatom-doped porous carbon-coated cuprous phosphide composite catalyst prepared in the present invention in zinc-air batteries.

[0047] combine Figure 13 Schematic diagram of the zinc-air battery setup used for testing. The negative pole is a zinc plate, and the positive pole is nickel foam loaded with the catalyst prepared in the present invention. The electrolyte is 6mol L -1 Potassium hydroxide aqueous solution, the positive and negative electrodes are separated by a diaphragm, the side of the positive electrode in contact with the air is a gas diffusion layer, and the gas diffusion layer is made of conductive carbon black and polytetrafluoroethylene.

[0048] Figure 14 Polarized discharge curves and corresponding power density curves for Zn-air battery devices assembled with the as-prepared catalysts at current densities of 10 and 100 mA cm -2 , the battery voltages are 1.27 and 0.88V respectively, and the maximum power densi...

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Abstract

The invention discloses application of a heteroatom-doped porous carbon coated cuprous phosphide composite catalyst in electrocatalytic oxygen reduction reaction and belongs to the technical field ofcomposite catalysts, electrocatalytic oxygen reduction and zinc air cells. The composite catalyst is obtained by using a nitrogen-phosphorus double-heteroatom mixed copper-based metal-organic frame material (Cu-NPMOF for short) as a precursor and carbonizing and phosphorizing, and is used for efficient electrocatalytic oxygen reduction. In potassium hydroxide electrolyte of 0.1 mol L-1, oxygen reduction semiwave potential of the catalyst is 0.78 V, and extreme diffusion current is 5.57 mA cm-2. 38 h's circular charging and discharging tests of zinc air batteries assembled by using the catalystshow that charging and discharging voltage difference has no obvious change, this indicates that the catalyst has quite high stability and high actual application value.

Description

technical field [0001] The invention relates to the technical field of composite catalysts, electrocatalysis and zinc-air batteries, in particular to the application of a heteroatom-doped porous carbon-coated cuprous phosphide composite catalyst in electrocatalytic reactions and zinc-air batteries. Background technique [0002] Since the 21st century, with the environmental pollution caused by traditional fossil energy, the greenhouse effect and resource shortages have become more and more serious, the fuel cell technology that can directly convert the chemical energy of fuel into clean electrical energy has attracted widespread attention from scientists from all over the world. As a new type of fuel cell, metal-air battery uses metal as fuel (negative electrode active material) and undergoes oxidation-reduction reaction with oxygen in the air (positive electrode active material) to convert chemical energy into electrical energy. It is a special fuel The battery is also a ne...

Claims

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Application Information

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IPC IPC(8): B01J27/14H01M4/90H01M4/86C25B11/06
CPCH01M4/8647H01M4/9083C25B11/04B01J27/14B01J35/398B01J35/33Y02E60/50
Inventor 王锐董喜燕李海洋张征臧双全
Owner ZHENGZHOU UNIV
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