NiFeP bifunctional transition metal phosphide catalyst as well as preparation and use thereof

A transition metal and phosphide technology, applied in the field of electrochemistry, can solve the problems that the efficiency of catalytic electrolysis of water cannot meet the needs of economic development, and achieve the effects of excellent full hydrolysis catalytic performance, abundant reserves, and low production costs

Active Publication Date: 2017-11-24
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some ternary bifunctional phosphide catalysts currently reported for full hydrolysis in alkaline environments have a current density of 10 mA / cm at a voltage of 1.6 volts. 2 , the efficiency of catalytic electrolysis of water can not meet the needs of economic development

Method used

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  • NiFeP bifunctional transition metal phosphide catalyst as well as preparation and use thereof
  • NiFeP bifunctional transition metal phosphide catalyst as well as preparation and use thereof
  • NiFeP bifunctional transition metal phosphide catalyst as well as preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 222 mg of ammonium fluoride and 290 mg of Ni (NO 3 ) 2 ·6H 2 O, 278mg FeSO 4 ·7H 2 O and 600 mg of urea were successively added to 40 ml of deionized water, and stirred for half an hour to make the solution evenly mixed.

[0036] The nickel foam (NF) was ultrasonically cleaned with acetone, alcohol solvent, and deionized water in sequence for 30 min, then ultrasonicated with 0.1 M dilute hydrochloric acid for 10-20 min, and finally ultrasonically cleaned with deionized water for 30 min.

[0037] Put the above-mentioned cleaned substrate into the PTFE liner in a 50ml reaction kettle, pour the above-mentioned mixed solution with uniform stirring, seal the reaction kettle, and then place it in a blast oven for 6 hours at 100°C. NiFe-LDH nanosheets are grown on the substrate.

[0038] After the temperature of the reaction kettle dropped to room temperature, the substrate was taken out and washed with deionized water and absolute ethanol in turn. The purpose of d...

Embodiment 2

[0046] Weigh 222 mg of ammonium fluoride and 290 mg of Ni (NO 3 ) 2 ·6H 2 O, 278mg FeSO 4 ·7H 2 O and 600 mg of urea were successively added to 40 ml of deionized water, and stirred for half an hour to make the solution evenly mixed.

[0047] The carbon fibers (CF) were ultrasonically cleaned with acetone, alcohol solvent, and deionized water for 30 min in turn, then ultrasonicated with 0.1 M dilute hydrochloric acid for 10-20 min, and finally ultrasonically cleaned with deionized water for 30 min.

[0048] Other operations are the same as in Example 1.

[0049] After growing NiFe-LDH nanosheets on the substrate, the sample with carbon fiber (CF) as the substrate was observed by scanning electron microscope (S-4800). figure 2 As shown, the substrate is covered with uniformly distributed nanosheets up to 5 μm in length.

[0050] The morphology of NiFeP@CF after phosphating was observed by scanning electron microscope. Figure 4 As shown, the substrate is covered with un...

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Abstract

The invention provides a NiFeP bifunctional transition metal phosphide catalyst which has a nanosheet structure, wherein the nanosheet has a length of 2-5 m and a thickness of 100-200 nm; the invention also provides a preparation method and use of the NiFeP bifunctional transition metal phosphide catalyst. The NiFeP bifunctional transition metal phosphide catalyst provided by the invention has a microstructure that the nanosheet having a relatively large specific surface area is used as a water-splitting electro-catalyst, so that the catalyst has higher catalytic performance. The preparation method provided by the invention comprises the following steps: using ferronickel compound, ammonium fluoride and urea as raw materials; growing NiFe-LDH nanosheets on a substrate under heat preservation; and phosphating at a low temperature to obtain NiFeP transition metal phosphide nanosheets. The operation is simple; the production cost is low; and the prepared phosphide catalyst is applied to full hydrolysis in an alkaline environment and has excellent full hydrolysis catalyzing performance.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a catalyst for electrocatalytic water splitting and preparation thereof. Background technique [0002] In recent years, resource shortage and environmental pollution have become two major crises facing the world. Therefore, in order to realize the sustainable development of human beings, the development of green and clean renewable energy has become an urgent problem that people need to solve. As a clean, renewable, environmentally friendly and non-polluting new energy, hydrogen energy has attracted people's attention. As an all-weather resource, hydrogen energy can be produced by electrolysis of water, and the water resources on the earth are extremely rich. Hydrogen production from water has unparalleled advantages and broad application prospects. [0003] At present, the most commonly used hydrogen evolution catalysts are still platinum noble metals, and the most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C25B1/04C25B11/06
CPCB01J27/1853B01J35/0033B01J35/023B01J35/026C25B1/04C25B11/04Y02E60/36
Inventor 孙向南祝向伟王洁洁张瑞
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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