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Platinum-non-precious metal alloy nanowire, and aqueous-phase synthesis method and application thereof

A non-precious metal and alloy nanotechnology, applied in the direction of nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of affecting the catalytic performance of the catalyst, the reaction process is complicated, the reaction rate is fast, etc., and it is suitable for large-scale production and the preparation method is simple. , the effect of good catalytic performance

Active Publication Date: 2018-12-18
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of strong reducing agent sodium borohydride, this method has a fast reaction rate and cannot achieve effective shape and size control.
[0005] Summarize the shortcomings of the above-mentioned prior art: using oleylamine or oleic acid as solvent, the reaction process is complicated, the cost is high, and the environment is not friendly. The product prepared has a strong interaction with oleylamine or oleic acid and is difficult to clean. The presence of oleic acid passivates the surface of the platinum catalyst and affects the catalytic performance of the catalyst; in addition, the use of sodium borohydride in the aqueous solution leads to a relatively fast reaction rate of the entire reaction system, which cannot effectively control the shape and size of the product
The existence of these shortcomings seriously hinders the industrialization and application of ultrafine platinum-non-noble metal alloy nanowires

Method used

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  • Platinum-non-precious metal alloy nanowire, and aqueous-phase synthesis method and application thereof
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  • Platinum-non-precious metal alloy nanowire, and aqueous-phase synthesis method and application thereof

Examples

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Embodiment 1

[0041] A water-phase synthesis method of platinum-nickel alloy nanowires, comprising the following steps:

[0042] (1) Preparation of platinum-nickel precursor solution

[0043] Add chloroplatinic acid, nickel chloride, sodium sulfite, and pH regulator into water so that the concentration of chloroplatinic acid and nickel chloride is 1.25×10 -5mol / L, the molar mass ratio of chloroplatinic acid to sodium sulfite is 1:6, adding a pH regulator to make the pH of the reaction solution 8, and standing at 30°C for 12 hours to obtain a platinum-nickel precursor solution.

[0044] (2) Preparation of ultrafine platinum-nickel alloy nanowires

[0045] The precursor concentration for preparing platinum-nickel metal is 1.25×10 -5 mol / L aqueous solution, adding vinylpyrrolidone and formic acid, so that the molar ratio of the precursor of platinum-nickel metal, vinylpyrrolidone, and formic acid is 1:100:40000 in sequence, and the obtained solution is moved to a hydrothermal reaction kettle...

Embodiment 2

[0048] A water-phase synthesis method of platinum-cobalt alloy nanowires, comprising the following steps:

[0049] (1) Preparation of platinum-cobalt precursor solution

[0050] Add chloroplatinic acid, cobalt chloride, sodium sulfite, and pH regulator into water so that the concentration of chloroplatinic acid and cobalt chloride is 1.25×10 -5 mol / L, the molar mass ratio of chloroplatinic acid to sodium sulfite is 1:6, a pH regulator is added to make the pH of the reaction solution 8, and the reaction solution is allowed to stand at 30°C for 12 hours to obtain a platinum-cobalt precursor solution.

[0051] (2) Preparation of ultrafine platinum-cobalt alloy nanowires

[0052] The precursor concentration of preparing platinum-cobalt metal is 1.25×10 -5 mol / L aqueous solution, add vinylpyrrolidone and formic acid, make the precursor of platinum-cobalt metal, vinylpyrrolidone, and formic acid have a molar ratio of 1:100:40000 in turn, and move the obtained solution into a hydro...

Embodiment 3

[0055] A water phase synthesis method of platinum-iron alloy nanowires, comprising the following steps:

[0056] (1) Preparation of platinum-iron precursor solution

[0057] Add chloroplatinic acid, ferric chloride, sodium sulfite, and pH regulator into water so that the concentration of chloroplatinic acid and ferric chloride is 1.25×10 -5 mol / L, the molar mass ratio of chloroplatinic acid to sodium sulfite is 1:6, adding a pH regulator to make the pH of the reaction solution 8, and standing at 30°C for 12 hours to obtain a platinum-iron precursor solution.

[0058] (2) Preparation of ultrafine platinum-iron alloy nanowires

[0059] The concentration of the precursor for preparing platinum-iron metal is 1.25×10 -5 mol / L aqueous solution, adding vinylpyrrolidone and formic acid, so that the molar ratio of the platinum-iron metal precursor, vinylpyrrolidone, and formic acid is 1:100:40000 in sequence, and the obtained solution is moved to a hydrothermal reaction kettle, and h...

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Abstract

The invention discloses a platinum-non-precious metal alloy nanowire, and an aqueous-phase synthesis method and application thereof, and belongs to the field of nanometer material science. According to the aqueous-phase synthesis method, coreduction of platinum salt and non-precious metal salt in an aqueous solution is achieved through a ligand, the controllable ultrafine platinum-non-precious metal alloy nanowire is successfully synthesized, and the technical problems are solved. A preparing method is simple, the yield is high, the steps are less, controllability is good, the nanowire in a product is small in diameter and uniform in structure, the surface of the ultrafine platinum-non-precious metal alloy nanowire prepared through the preparing method is easy to clean, and the ultrafine platinum-non-precious metal alloy nanowire has superior performance in hydrogen production through electrolytic water.

Description

technical field [0001] The invention belongs to the field of nanometer material science, in particular to a platinum-non-precious metal alloy nanowire and its aqueous phase synthesis method and application. Background technique [0002] Platinum has excellent catalytic properties, which are derived from its unique surface electronic structure and physical and chemical properties. It is widely used in many catalytic fields, such as hydrogenation catalysis, dehydrogenation catalysis, oxidation catalysis, cracking catalysis, etc. However, the reserves of platinum in the earth's crust are scarce, and it is difficult to mine and smelt it. Therefore, platinum must be fully and efficiently used. How to efficiently utilize noble metal platinum, improve the catalytic activity and stability of noble metal platinum catalysts, and reduce the cost of noble metal platinum catalysts is of great significance to the effective utilization of rare metals and the development of the national eco...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00B22F1/00B82Y30/00C25B1/04C25B11/06
CPCC25B1/04B82Y30/00B82Y40/00B22F9/24C25B11/097B22F1/0547Y02E60/36
Inventor 高传博刘钊钧
Owner XI AN JIAOTONG UNIV
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