Nitrogen phosphorus co-doped porous carbon-coated copper phosphide composite catalyst and its preparation method

A cuprous phosphide and co-doping technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of less research

Active Publication Date: 2018-03-13
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, copper is a low-cost transition metal element with more abundant reserves in the earth's crust, but transition metal phosphides based on copper (Cu 3 P) Research on materials in this area is still relatively small

Method used

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  • Nitrogen phosphorus co-doped porous carbon-coated copper phosphide composite catalyst and its preparation method
  • Nitrogen phosphorus co-doped porous carbon-coated copper phosphide composite catalyst and its preparation method
  • Nitrogen phosphorus co-doped porous carbon-coated copper phosphide composite catalyst and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1: Synthesis of nitrogen and phosphorus co-doped porous carbon material coated cuprous phosphide composite electrocatalytic hydrogen production catalyst.

[0031] (1) Dissolve 0.52 g of copper nitrate trihydrate, 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. PXRD of the precursor such as figure 1 As shown, the prepared precursor has strong diffraction peaks and almost completely agrees with the PXRD peaks simulated by single crystal data, indicating that the prepared precursor has high crystallinity and purity.

[0032] (2) Put 200 mg of the blue solid powder obtained in step (1) into a quartz boat, place the...

Embodiment 2

[0036] Example 2: The performance test of the nitrogen-phosphorus co-doped porous carbon material coated cuprous phosphide composite material of the present invention as an electrocatalyst.

[0037] Preparation of electrocatalyst working electrode:

[0038] 2mg of Cu prepared by the present invention 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. 5uL of the slurry was drop-coated on the glassy carbon electrode and dried at room temperature for use. The electrocatalyst performance test adopts a three-electrode system, and the electrolyte is 0.5mol L -1 of sulfuric acid solution. The test instrument is Shanghai Chenhua CHI660E Electrochemical Workstation.

[0039] like Image 6 Shown, at 0.5mol L -1 In the sulfuric acid electrolyte, the electrode loaded with the catalyst has a ...

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Abstract

The invention discloses nitrogen phosphorus co-doped porous carbon-coated copper phosphide composite catalyst and its preparation method, and relates to the technical field of composite catalyst and electro-catalysis. The of composite catalyst prepares the composite nitrogen phosphorus co-doped porous carbon-coated copper phosphide hydrogen-producing catalyst by taking a nitrogen phosphorus double-heteroatom mixing type copper based metal-organic framework material (Cu-NPMOF for short) as a precursor, and is used for producing hydrogen efficiently by brine electrolysis. In the .05 mol-L-1 sulfate electrolyte, the overpotential of hydrogen evolution is 0-89mV when the current density is 10mAcm-2, and the nitrogen phosphorus co-doped porous carbon-coated copper phosphide composite catalyst has low hydrogen overvoltage. Through circular tests for many times, the catalyst keeps good catalytic activity, and has strong stability, and high actual application value.

Description

technical field [0001] The invention relates to the technical field of composite catalysts and electrocatalysis, in particular to a nitrogen-phosphorus co-doped porous carbon-coated cuprous phosphide composite catalyst and a preparation method thereof. Background technique [0002] In today's society with the development of global industrialization and the increasing shortage of fossil energy, hydrogen, as a high-energy-density, clean and environmentally friendly renewable energy carrier, is very suitable for the energy needs of future globalization and has attracted widespread attention from scientists all over the world. At present, the mature commercial hydrogen evolution catalysts are mainly noble metal materials (such as platinum, etc.), but their high cost and low reserves severely limit the wide application of such materials. [0003] Transition metal phosphide materials, which are widely used in dehydrogenation and sulfuration processes, have attracted great attentio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C25B1/04C25B11/06
CPCB01J27/24B01J35/0033B01J35/026B01J35/10B01J37/06B01J37/086C25B1/04C25B11/04Y02E60/36
Inventor 董喜燕王锐李海洋张宇虹臧双全
Owner ZHENGZHOU UNIV
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