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Nanometer material with precious metal particles dispersed on surface of non-precious metal substrate and preparation method and application of nanometer material

A non-precious metal and nano-material technology, applied in the field of inorganic advanced nano-materials, can solve the problems such as the easy dissolution of noble metal catalysts, achieve the effects of not easy to fall off stability, improve reactivity, and reduce costs

Pending Publication Date: 2022-05-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strong electronic interaction firmly anchors the noble metal particles to the substrate surface, which solves the stability problem caused by the easy dissolution of the noble metal catalyst during the long-term oxygen evolution reaction

Method used

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  • Nanometer material with precious metal particles dispersed on surface of non-precious metal substrate and preparation method and application of nanometer material
  • Nanometer material with precious metal particles dispersed on surface of non-precious metal substrate and preparation method and application of nanometer material
  • Nanometer material with precious metal particles dispersed on surface of non-precious metal substrate and preparation method and application of nanometer material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Example 1 - Chemical Deposition

[0084] The preparation method of the nanomaterial (iridium / cobalt manganese iron hydroxide) in which the precious metal particles are dispersed on the surface of the non-precious metal substrate, adopts the chemical deposition method described in the second aspect of the present invention, and is specifically as follows:

[0085] Step (1) Preparation of non-precious metal substrate-cobalt manganese iron hydroxide nanosheets

[0086] Prepare 40 milliliters of lye A: prepare 40 milliliters of lye A with 0.48 grams of sodium hydroxide and 0.106 grams of sodium carbonate and an appropriate amount of deionized water;

[0087]To prepare 40 ml of salt solution B: 0.291 g of cobalt nitrate, 0.05 g of manganese nitrate and 0.202 g of ferric nitrate and an appropriate amount of deionized water were prepared into 40 ml of salt solution B.

[0088] Solution A and solution B were dropped into 40 ml of high-speed stirring water at the same time, and...

Embodiment 2

[0104] Example 2 - Chemical Deposition

[0105] The preparation method of the nanomaterial (ruthenium / nickel-iron hydroxide) in which the precious metal is dispersed on the surface of the non-precious metal substrate, adopts the chemical deposition method described in the second aspect of the present invention, and is specifically as follows:

[0106] Referring to the method in Example 1, when 40 ml of salt solution B was prepared in step (1), the mass of nickel nitrate was changed to 0.436 g, the mass of ferric nitrate was 0.202 g, and the alkaline solution was changed to 0.14 g of sodium hydroxide and 0.053 g of sodium carbonate.

[0107] Change step (2) to prepare 2 ml of ruthenium chloride solution: 2.489 g of ruthenium chloride (6000 mmol / L), 480 mg of sodium hydroxide (6000 mmol / L).

[0108] Conditions were: 10°C, 120 hours.

Embodiment 3

[0117] Example 3 - Electrodeposition

[0118] The preparation method of the nanomaterial in which the precious metal particles are dispersed on the surface of the non-precious metal substrate adopts the electrodeposition method described in the third aspect of the present invention, and the details are as follows:

[0119] Step (1) prepare a conductive carrier loaded with a non-precious metal substrate - nickel foam loaded with nickel-iron hydroxide:

[0120] Mix 0.6 g of urea, 0.121 g of ferric nitrate, 0.174 g of nickel nitrate, 0.05 g of vanadium chloride, 0.037 g of ammonium fluoride and deionized water into a 36-ml solution, pour the solution into a 40-ml 3*4 cm 2 The foamed nickel is soaked in the solution, put into an oven, and the reaction temperature is 100 degrees Celsius, and the time is 12 hours, and hydrothermally, crystallization, washing, drying obtains the foamed nickel (nickel-iron-vanadium hydrogen) that is loaded with nickel-iron-vanadium hydroxide. oxide ...

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Abstract

The invention belongs to the technical field of inorganic advanced nano materials, and particularly relates to a nano material with precious metal particles dispersed on the surface of a non-precious metal substrate and a preparation method and application of the nano material. The nano material comprises a non-noble metal substrate and noble metal particles dispersed on the surface of the non-noble metal substrate, halogen and oxygen are simultaneously coordinated on the surface of the noble metal. The nano-catalyst with noble metal particles dispersed on the surface of non-noble metal is designed, and due to the dispersion characteristic of the noble metal particles, the use amount of noble metal is reduced, and meanwhile, the nano-catalyst has high activity of a noble metal catalyst. And the noble metal particles are firmly anchored on the surface of the substrate through strong electron interaction, so that the stability problem caused by easy dissolution of the noble metal catalyst in a long-time oxygen evolution reaction is solved. On the other hand, electron clouds between the precious metal and the substrate are redistributed and interact with chlorine in seawater electrolysis, and the oxygen evolution activity and selectivity are improved.

Description

technical field [0001] The invention belongs to the technical field of inorganic advanced nanomaterials, and in particular relates to a nanomaterial in which noble metal particles are dispersed on the surface of a non-precious metal substrate, and a preparation method and application thereof. Background technique [0002] With the growth of human demand for energy, the existing conventional energy resources in the world are seriously insufficient, and the development of renewable new energy is imminent. Hydrogen energy is a widely used secondary energy, which is of great significance for building a clean, low-carbon, safe and efficient energy system. Water electrolysis is an important way to produce hydrogen. However, the fresh water resources available to human beings are extremely limited, and its total storage capacity is less than 1% of the total water volume of the earth, so pure hydrogen production from pure water is not enough to meet human demand for hydrogen energy...

Claims

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Application Information

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IPC IPC(8): C25B11/081C25B11/054C25B11/067C25B1/04
CPCC25B11/081C25B11/054C25B11/067C25B1/04Y02E60/36
Inventor 孙晓明段欣漩杨国涛刘威沙琪昊李天水邝允
Owner BEIJING UNIV OF CHEM TECH
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