Preparation method of nickel tungsten phosphide-nickel tungsten oxide with heterostructure

A technology of nickel-tungsten oxide and heterostructure, applied in phosphides, phosphorus compounds, chemical instruments and methods, etc., can solve the problems of limited active surface area, poor stability, poor conductivity, etc., and achieve abundant reserves and high-quality products The effect of uniform shape distribution and low cost

Active Publication Date: 2021-06-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the many transition metal phosphides, some phosphides have disadvantages such as poor conductivity,

Method used

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  • Preparation method of nickel tungsten phosphide-nickel tungsten oxide with heterostructure
  • Preparation method of nickel tungsten phosphide-nickel tungsten oxide with heterostructure
  • Preparation method of nickel tungsten phosphide-nickel tungsten oxide with heterostructure

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1:

[0029] (1) Cut NF 2 × 3cm 2 The small piece was placed in 3M concentrated hydrochloric acid to clean 20 min to remove an oxide of the NF surface; after, no water ethanol was washed 3 times with deionized water.

[0030] (2) Weigh a certain quality Ni (NO 3 ) 2 · 6h 2 O and (NH) 4 ) 6 Hide 2 W 12 O 40 · NH 2 O At the same time, the mixed solution was added to deionized water, wherein the molar ratio of Ni: W was 1: 3, the concentration of the nickel source was 0.016 mol / L, the concentration of the tungsten source was 0.0042 mol / L, and the mixture was ultrasound at room temperature. 20min, get a clear blue solution A.

[0031] (3) Putting the NF tilt 45 ° in steps (1) is sealed in the reactor liner of Polytetrafluoroethylene, and then places the liner into the outer extuls of stainless steel, and finally place the outer extuls in the electric heating In the drying tank, it was hot and hot at 185 ° C for 20 h.

[0032] After the hydrothermal reaction, the reac...

Example Embodiment

[0034] Example 2

[0035] (1) Cut NF 2 × 3cm 2 The small piece was placed in 2 m concentrated hydrochloric acid to clean 25 min to remove an oxide of the NF surface; after, it was washed 4 times with anhydrous ethanol and deionized water.

[0036] (2) Weigh a certain quality Ni (NO 3 ) 2 · 6h 2 O and (NH) 4 ) 6 Hide 2 W 12 O 40 · NH 2 O At the same time, the mixed solution was added to 30 ml of deionized water, wherein the molar ratio of Ni: W was controlled from 3: 1, the concentration of the nickel source was 0.05 mol / L, the concentration of the tungsten source was 0.0014mol / L, at room temperature. Mix 25min to get a clear blue solution A.

[0037] (3) Putting the NF inclined 55 ° in steps (1) is sealed in the reactor liner of Polytetrafluoroethylene, and then places the liner into the outer tank of stainless steel, and finally places the outer extuls to the electric heat. In the drying tank, the hot reaction was reacted at 190 ° C for 21 h.

[0038] After the hydrolysis rea...

Example Embodiment

[0040] Example 3:

[0041] (1) Cut NF 2 × 3cm 2 The small pieces were placed in 4 m concentrated hydrochloric acid to clean 30 min to remove an oxide of the NF surface; after, anhydrous ethanol was washed 5 times with anhydrous ethanol.

[0042] (2) Weigh a certain quality Ni (NO 3 ) 2 · 6h 2 O and (NH) 4 ) 6 Hide 2 W 12 O 40 · NH 2 O At the same time, it was added to 30 ml of deionized water to formulate a mixed solution, wherein the molar ratio of Ni: W was 1: 1, the concentration of the nickel source was 0.03 mol / L, the concentration of the tungsten source was 0.0028 mol / L, at room temperature Ultrasound Mix 15 min to get a clear blue solution A.

[0043] (3) Putting the NF tilted 65 ° in steps (1) is sealed in the reactor liner of Polytetrafluoroethylene, and then places the liner into the outer extuls of stainless steel, and finally place the alvease to the electric heat In the drying tank, the heat was stirred at 195 ° C for 19 h.

[0044] After the hydrolysis reaction, ...

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Abstract

The invention discloses a preparation method of a nickel tungsten phosphide-nickel tungsten oxide with a heterostructure, which relates to the field of catalytic electrodes for energy conversion. The nickel tungsten phosphide-nickel tungsten oxide with the heterostructure is prepared on foamed nickel by adopting a hydrothermal method and a tubular furnace phosphating method. When water is electrolyzed in an alkaline medium, the material with the heterostructure shows excellent electro-catalytic hydrogen evolution performance and cycling stability as a cathode material, the current density of 10 mA/cm<2> can be reached only by 115 mV overpotential, and the hydrogen evolution catalytic activity of the material can be comparable with that of a noble metal platinum group catalyst. The heterostructure nickel tungsten phosphide-nickel tungsten oxide designed from the microscopic level is low in synthesis cost and simple and convenient in process, and has a good application prospect in the aspects of replacing a noble metal catalyst and large-scale implementation of hydrogen production by water electrolysis.

Description

technical field [0001] The invention relates to the field of catalytic electrodes for energy conversion, in particular to a preparation method and application of a heterostructure nickel-tungsten phosphide-nickel-tungsten oxide. Background technique [0002] Environmental pollution caused by excessive consumption of fossil fuels poses a serious threat to the sustainable development of human beings. Hydrogen has the advantages of high calorific value and zero pollution. Therefore, building a "hydrogen economy" with hydrogen as the main energy carrier is inevitable for sustainable development. trend. Among the many ways to produce hydrogen, hydrogen production by electrolysis of water is the most green and efficient. However, the hydrogen production efficiency of electrolyzed water is limited by the high overpotential required for the multi-electron transfer of hydrogen evolution / oxygen evolution, which makes it consume a lot of energy. For the hydrogen evolution reaction, p...

Claims

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Application Information

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IPC IPC(8): C01G53/04C01B25/08C25B1/04C25B11/04
CPCC01G53/04C01B25/088C25B1/04C01P2002/72C01P2004/03C01P2006/40Y02E60/36
Inventor 范爱玲庞伟谢登奎郭亚奇高殿超
Owner BEIJING UNIV OF TECH
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