Nitrogen and phosphorus doped porous carbon-rhodium phosphide catalyst as well as preparation method and application thereof

A technology of rhodium catalyst and porous carbon, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex synthesis steps, inability to synthesize on a large scale, and difficulty in large-scale synthesis, etc. Achieve the effect of simple synthesis method, easy promotion and industrialization, and uniform size

Inactive Publication Date: 2018-11-06
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Metal phosphides exhibit excellent stability and catalytic activity, but the current metal phosphides are in the laboratory stage, and it is difficult to synthesize them on a large scale
Metal Ru2 and Rh2P have properties comparable to those of commercial Pt/C catalysts. For example, Mr. Li Yadong of Tsinghua University synthesized a kind of Rh2P. Under acidic c

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  • Nitrogen and phosphorus doped porous carbon-rhodium phosphide catalyst as well as preparation method and application thereof
  • Nitrogen and phosphorus doped porous carbon-rhodium phosphide catalyst as well as preparation method and application thereof
  • Nitrogen and phosphorus doped porous carbon-rhodium phosphide catalyst as well as preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0031] Example 1

[0032] The preparation method of the nitrogen-phosphorus-doped porous carbon-rhodium phosphide catalyst in this embodiment is specifically as follows:

[0033] 1) Add 1 volume of glucose and 2 weight of glyphosate to 20 volumes of water, stir and mix evenly to prepare a mixed solvent;

[0034] 2) Add 2 volumes of rhodium chloride to the mixed solvent, stir it magnetically for 1 hour to prepare a uniform mixed solution, and heat to 150°C for 2 hours to change the mixed solution into a sol colloid and cool;

[0035] 3) Put the obtained sol colloid in an oven at 60°C and keep it for 48h to dry until it becomes a yellow powder. The yellow powder is ground with a grinder and passed through a molecular sieve of 400 meshes. The ground product is collected and then placed in a 600°C The furnace is calcined for 8 hours to obtain black nitrogen-phosphorus-doped porous carbon-rhodium phosphide nanomaterial;

[0036] 4) After washing the black nanomaterials with water and ethano...

Example Embodiment

[0039] Example 2

[0040] This embodiment is the same as embodiment 1, the difference is that in this embodiment,

[0041] The raw materials used in step (1) are 20 volumes of water, 2 weights of flour, 0.5 volumes of melamine and 2 volumes of phytic acid;

[0042] Step (2) Add 2 volumes of rhodium nitrate, heat to 120°C, and keep it for 15h;

[0043] Step (3) The drying temperature is 80°C for 48 hours, and the calcination temperature is 1100°C for 8 hours;

[0044] Step (4) The drying temperature is 110°C.

[0045] The prepared nitrogen-phosphorus-doped porous carbon-rhodium phosphide nanomaterial catalyst has a special composite structure, and the nitrogen-phosphorus-doped porous supports 5-12nm size particles, and the rhodium phosphide nanoparticles are wrapped in the porous carbon. .

[0046] The nitrogen-phosphorus-doped porous carbon-rhodium phosphide nano-material catalyst obtained in Example 2 was used as the electrolysis water hydrogen production catalyst, and the simulated wat...

Example Embodiment

[0047] Example 3

[0048] This embodiment is the same as embodiment 1, the difference is that in this embodiment,

[0049] The raw materials used in step (1) are 40 volumes of water, 5 weights of starch, 2 weights of urea and 3 volumes of phytic acid;

[0050] Step (2) Add 3 volumes of rhodium nitrate, heat to 90°C and keep for 20h;

[0051] Step (3) The drying temperature is 100°C for 48 hours, and the calcination temperature is 1000°C for 8 hours;

[0052] Step (4) The drying temperature is 110°C.

[0053] The prepared nitrogen-phosphorus-doped porous carbon-rhodium phosphide nanomaterial catalyst has a special composite structure, and the nitrogen-phosphorus-doped porous supports 10-30nm particles, and the rhodium phosphide nanoparticles are wrapped in the porous carbon. .

[0054] The nitrogen-phosphorus-doped porous carbon-rhodium phosphide nano-material catalyst obtained in Example 3 was used as the electrolysis water hydrogen production catalyst, and the simulated water electrolys...

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Abstract

The invention discloses a nitrogen and phosphorus doped porous carbon-rhodium phosphide catalyst as well as a preparation method and application thereof, and relates to the technical field of a catalyst. Polyhydric alcohol, a rhodium source and substances containing a nitrogen and phosphorus compound are dispersed into water; stirring is performed to form mixed sol; one-step high-temperature calcination is used for preparation to obtain a composite nanometer material with the rhodium phosphide loaded on porous carbon, wherein a porous carbon carrier is modified by nitrogen and phosphorus in the compound; rhodium phosphide nanoparticles are loaded on the nitrogen and phosphorus modified porous carbon, wherein the rhodium phosphide nanoparticles have the size being 4 to 8 nanometers. The prepared nitrogen and phosphorus doped porous carbon-rhodium phosphide catalyst has the advantages that the synthetic method is simple; the repeatability is high; the operation is easy; the characteristics of uniform dimension, high purity, lower cost than that of platinum-carbon materials, complete industrialized production and the like are realized; the performance of generating hydrogen through water electrolysis is about the same as that of platinum-carbon; very practical industrial values are realized.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a porous carbon-rhodium phosphide catalyst doped with nitrogen and phosphorus, a preparation method and application thereof. Background technique [0002] With the rapid development of the world's energy revolution, the replacement of traditional fossil fuels by clean and renewable energy represented by hydrogen energy is an inevitable trend in the development of the 21st century. Therefore, the development and utilization of hydrogen energy is particularly urgent. Hydrogen production by electrolysis of water is one of the main methods to achieve large-scale hydrogen production at present, but the existence of overpotential leads to excessive energy consumption, which is the bottleneck restricting its industrial development. Although the commercial Pt / C catalyst is currently the best hydrogen evolution catalyst, the low reserves and high price limit its large-scale...

Claims

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Application Information

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IPC IPC(8): B01J27/24C25B1/04C25B11/06
CPCB01J27/24C25B1/04C25B11/091Y02E60/36
Inventor 柳守杰马婉娇
Owner ANHUI NORMAL UNIV
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