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Nanometer platinum-nickel alloy and preparation and application thereof

A technology of nickel alloy and nano-platinum, which is applied in the direction of nanotechnology, can solve the problems of uneven composition of alloy particles, difficult control of preparation conditions, and difficult control of particle size, so as to achieve large specific surface area, improve activity and electrocatalytic performance, The effect of improving the utilization rate

Active Publication Date: 2016-12-07
HONGHE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the method for preparing platinum-nickel alloy is extremely harsh, the preparation conditions are difficult to control, the preparation yield is low, the repeatability is poor, the composition of the obtained alloy particles is not uniform, and the particle size is difficult to control. Therefore, it is necessary to find a composition It is very important to have alloy catalysts with uniform size

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method for a nano-platinum-nickel alloy catalyst for direct methanol dye battery, comprising the following steps:

[0023] (1) Dissolve 1mmol cetyltrimethylammonium bromide in 20mL ethylene glycol to obtain solution A;

[0024] (2) Dissolve 1g of chloroplatinic acid in 100mL of water to obtain a chloroplatinic acid aqueous solution with a concentration of 0.0193mol / L, then add 2.5mL of 0.1mol / L nickel chloride aqueous solution to it, and then add 6g of PVP to the mixed system (Mw=40000), stirred until completely dissolved to obtain solution B;

[0025] (3) Add solution A to solution B, then add sodium chloride, stir evenly, add a mixed solution of sodium carbonate and sodium hydroxide, adjust the pH to 10, and then place it in an ice-water bath;

[0026] (4) Add 0.5 mol / L NaHB solution dropwise to the mixing system in step (3), and slowly stir the system. After the dropping, the mixed solution is heated to 60° C. and kept for 60 hours to obtain a granular...

Embodiment 2

[0029] A preparation method for a nano-platinum-nickel alloy catalyst for direct methanol dye battery, comprising the following steps:

[0030] (1) Dissolve 0.05mmol cetyltrimethylammonium bromide in 20mL ethanol to obtain solution A;

[0031] (2) 1g of chloroplatinic acid is dissolved in 100mL water to obtain a concentration of 0.0193mol / L aqueous chloroplatinic acid, then add 2mL of 0.1mol / L nickel chloride aqueous solution to it, then add 5g PVP ( Mw=40000), stirred until completely dissolved to obtain solution B;

[0032] (3) Add solution A to solution B, then add sodium chloride, after stirring evenly, add sodium hydroxide solution, adjust the pH to 12, and then place it in an ice-water bath;

[0033] (4) Add 0.5 mol / L NaHB solution dropwise to the mixing system in step (3), and slowly stir the system. After the dropping, the mixed solution is heated to 70° C. and kept for 24 hours to obtain a granular product;

[0034] (5) Wash the granular product with saturated sodiu...

Embodiment 3

[0036] A preparation method for a nano-platinum-nickel alloy catalyst for direct methanol dye battery, comprising the following steps:

[0037] (1) Dissolve 0.04mmol tetrabutylphosphine bromide in 20mL ethylene glycol to obtain solution A;

[0038] (2) 1g of chloroplatinic acid is dissolved in 100mL of water to obtain a concentration of 0.0193mol / L of chloroplatinic acid aqueous solution, then add 5mL of 0.1mol / L nickel chloride aqueous solution to it, and then add 6g of PVP ( Mw=40000), stirred until completely dissolved to obtain solution B;

[0039] (3) Add solution A to solution B, then add sodium chloride, stir evenly, add a mixed solution of sodium hydroxide and sodium bicarbonate, adjust the pH to 10.8, and then place it in an ice-water bath;

[0040] (4) Add 0.5 mol / L NaHB solution dropwise to the mixing system in step (3), and slowly stir the system. After the dropping, the mixed solution is heated to 50° C. and kept for 72 hours to obtain a granular product;

[004...

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Abstract

The invention discloses a nanometer platinum-nickel alloy and preparation and application thereof, and relates to the technical field of nanometer catalysts. Firstly, chloroplatinic acid and nickel chloride are mixed in proportion; then, PVP is added; after the pH of solution is adjusted, a reducing agent is added; and an alloy catalyst with uniform shape structure and size is obtained through strictly controlling the reaction temperature and the reaction time. The nanometer platinum-nickel alloy improves the metal activity and the electro-catalytic property through synergistic effect between metal platinum and metal nickel, reduces the use level of precious metal platinum, reduces the cost, is simple in preparation method, is mild and controllable, needs no higher temperature and harsh experiment conditions, is excellent in experiment stability, and is high in yield.

Description

technical field [0001] The invention relates to the technical field of nano-catalysts, in particular to a nano-platinum-nickel alloy and its preparation and application. Background technique [0002] With the rapid development of society, the energy demand is the main problem that human beings urgently need to solve. The fuel cell is a clean energy source, and it is also considered to be the most promising energy source. In the catalytic oxidation reaction of methanol, metal platinum is The low position and the low active sites riding on the surface of nanoparticles are beneficial to the electrooxidation of small organic molecules and the decomposition of water, showing high catalytic activity, creating a microstructure with multiphase interface structure and surface controllability. Nanostructured alloy particles, however, platinum is not only expensive but also poor stability, hindering its wide application in fuel cells. Therefore, it is particularly important to find a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 吴昊张文斌
Owner HONGHE COLLEGE
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