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Porous hollow RuP@PNC catalyst and preparing method and application thereof

A catalyst and hollow technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of unfavorable development and not many active sites

Active Publication Date: 2019-02-05
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the consumption of pure ruthenium catalyst is not much different from that of platinum, and there are not many active sites, which is not conducive to its commercial development.

Method used

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  • Porous hollow RuP@PNC catalyst and preparing method and application thereof
  • Porous hollow RuP@PNC catalyst and preparing method and application thereof
  • Porous hollow RuP@PNC catalyst and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of porous hollow RuP@PNC catalyst:

[0026] Weigh 112mg of ruthenium chloride, 13.3mg of ferric chloride and 1mL of phytic acid and dissolve them in a beaker with 30mL of water, add 1.6g of dicyandiamide, 40mg of glucose and 40mg of ammonium sulfate after stirring for 2 hours, and continue stirring for 12 hours After the liquid has to be mixed evenly, stop stirring.

[0027] Put the obtained homogeneous mixed liquid in a blast drying oven at 90°C for 12 hours to evaporate the moisture in the homogeneously mixed liquid to obtain a dry solid product. After grinding the obtained solid product evenly, put it into a crucible , the crucible was then placed in a tube furnace, and calcined in the tube furnace for 2 h in a nitrogen atmosphere at a calcination temperature of 800° C. to obtain a metal nanocatalyst. Add the obtained metal nano-catalyst to 40 mL of hydrochloric acid aqueous solution and stir for 1-2 days (the concentration of the hydrochloric ...

Embodiment 2

[0028] Example 2 Preparation of porous hollow RuP@PNC catalyst:

[0029] The ruthenium chloride that takes by weighing 11.2mg, the ferric chloride of 13.3mg and the phytic acid of 1mL are dissolved in the beaker that has 30mL water, add dicyandiamide 1.6g, glucose 40mg and ammonium sulfate 40mg after stirring 2h, continue stirring 12 After hours, the liquid has to be evenly mixed and the stirring is stopped.

[0030] Put the obtained homogeneous mixed liquid in a blast drying oven at 90°C for 12 hours to evaporate the moisture in the homogeneously mixed liquid to obtain a dry solid product. After grinding the obtained solid product evenly, put it into a crucible , the crucible was then placed in a tube furnace, and calcined in the tube furnace for 2 h in a nitrogen atmosphere at a calcination temperature of 800° C. to obtain a metal nanocatalyst. Add the obtained metal nano-catalyst to 40 mL of hydrochloric acid aqueous solution and stir for 1-2 days (the concentration of the...

Embodiment 3

[0031] Example 3 Preparation of hollow porous core RuP@PNC catalyst:

[0032] The ruthenium chloride that takes by weighing 22.2mg, the ferric chloride of 13.3mg and the phytic acid of 1mL are dissolved in the beaker that has 30mL water, add dicyandiamide 1.6g, glucose 40mg and ammonium sulfate 40mg after stirring 2h, continue stirring 12 After hours, the liquid has to be evenly mixed and the stirring is stopped.

[0033] Put the obtained homogeneous mixed liquid in a blast drying oven at 90°C for 12 hours to evaporate the moisture in the homogeneously mixed liquid to obtain a dry solid product. After grinding the obtained solid product evenly, put it into a crucible , the crucible was then placed in a tube furnace, and calcined in the tube furnace for 2 h in a nitrogen atmosphere at a calcination temperature of 800° C. to obtain a metal nanocatalyst. Add the obtained metal nano-catalyst to 40 mL of hydrochloric acid aqueous solution and stir for 1-2 days (the concentration o...

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Abstract

The invention discloses a porous hollow RuP@PNC catalyst and a preparing method and application thereof. According to the preparing process of the porous hollow RuP@PNC catalyst, ferric salt, ruthenium salt, phosphide, nitride, carbide and a pore-foaming agent are dissolved in water, after even stirring and mixing are conducted, water in mixed liquid is completely evaporated, a solid product is obtained and ground uniformly, then, roasting is conducted at the nitrogen atmosphere, a product obtained after roasting is arranged in a hydrochloric acid water solution, accordingly, the iron elementin the product can be dissolved and removed, a part of the product is hollow, the product is taken out of the hydrochloric acid water solution to be dried, and the porous hollow RuP@PNC catalyst is obtained. According to the porous hollow RuP@PNC catalyst, the phosphide is formed through phosphorus doping and ruthenium, the charge structure between the phosphorus and the ruthenium is changed through mutual combination of the phosphorus and the ruthenium, a part of the catalyst is hollow through removal of the iron element, the active site of metal is increased, the charge transfer situation between the elements is changed, and accordingly the hydrogen evolution reaction performance of the catalyst is improved.

Description

technical field [0001] The invention relates to a porous and hollow RuP@PNC catalyst and its preparation method and application. Background technique [0002] With the gradual increase in consumption of fossil fuels and the decrease in reserves year by year, the advent of environmental problems and energy crises has made human beings pay more and more attention to environmental protection, and people's urgency to develop green and renewable energy is increasing day by day. Therefore, it is necessary to find renewable clean energy to replace traditional fossil energy. Hydrogen energy, as an efficient, clean and ideal secondary energy source, has received extensive attention. Its source is mainly water electrolysis. Therefore, how to improve the efficiency of water splitting to produce hydrogen has become the most urgent key problem to be solved. As we all know, platinum is the main catalyst for the hydrogen evolution reaction, but due to the high price of metal platinum, the...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06
CPCC25B1/04C25B11/091Y02E60/36
Inventor 王建国钟兴陈先朗
Owner ZHEJIANG UNIV OF TECH
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