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Preparation method of PdCu alloy particle loaded NiFe-LDH metal nanosheet material electrocatalyst

A technology of metal nano and alloy particles, which is applied in the direction of electrodes, circuits, electrolytic components, etc., and can solve problems such as threats to the environment and human health, and polluted water sources

Active Publication Date: 2022-05-20
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the intervention of human activities (industrial production discharge, excessive fertilization), a large amount of nitrogen pollutants (nitrite and nitrate) enter the ground, pollute water sources, and pose a potential threat to the environment and human health

Method used

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  • Preparation method of PdCu alloy particle loaded NiFe-LDH metal nanosheet material electrocatalyst
  • Preparation method of PdCu alloy particle loaded NiFe-LDH metal nanosheet material electrocatalyst
  • Preparation method of PdCu alloy particle loaded NiFe-LDH metal nanosheet material electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step (1) mix 0.25 liters of deionized water and 0.75 liters of triethylene glycol, first add 25g nickel nitrate hexahydrate, add 8g ferric chloride hexahydrate after dissolving, add 20g urea after ultrasonic dispersion for 15 minutes, and stir for 1.5 hours , to form a uniform reaction solution;

[0023] Step (2) The reaction solution is placed in a hydrothermal kettle for heating reaction, the heating temperature is 110 ° C, and the heating time is 30 hours; after the reaction is completed, filter and wash with deionized water 3 times, put it into the ethanol solution and soak for 20 hours, Washed with absolute ethanol twice, dried in a vacuum oven at 50°C for 30 hours to obtain NiFe-LDH powder;

[0024] Step (3) Dissolve 2 grams of NiFe-LDH powder in 1 liter of deionized water, and then add 0.1 grams of K 2 PdCl 4 and 0.01 g CuCl 2 .2H 2 O, fully dissolved; take NaBH with a concentration of 1 mmol / L 4 Add 1 liter of solution in 10 times, 100 ml each time, and sti...

Embodiment 2

[0028] Step (1) Mix 0.2 liters of deionized water and 0.8 liters of triethylene glycol, first add 20g nickel nitrate hexahydrate, add 6g ferric chloride hexahydrate after dissolving, add 15g urea after ultrasonic dispersion for 30 minutes, and stir for 1 hour , to form a uniform reaction solution;

[0029] Step (2) The reaction solution is placed in a hydrothermal kettle for heating reaction, the heating temperature is 115 ° C, and the heating time is 28 hours; after the reaction, filter and wash 3 times with absolute ethanol, put it into the ethanol solution and soak for 22 hours, Washed with absolute ethanol twice, dried in a vacuum oven at 60°C for 28 hours to obtain NiFe-LDH powder;

[0030] Step (3) Dissolve 2.2 grams of NiFe-LDH powder in 1 liter of deionized water, and then add 0.2 grams of K 2 PdCl 4 and 0.02 g CuCl 2 .2H2 O, fully dissolved; take NaBH with a concentration of 0.9 mmol / L 4 The solution was 1.2 liters, added in 15 times, 80 ml each time, and stirred ...

Embodiment 3

[0034] Step (1) mix 0.18 liters of deionized water and 0.82 liters of triethylene glycol, first add 30g nickel nitrate hexahydrate, add 5g ferric chloride hexahydrate after dissolving, add 10g urea after ultrasonic dispersion for 20 minutes, and stir for 2 hours , to form a uniform reaction solution;

[0035] Step (2) The reaction solution is placed in a hydrothermal kettle for heating reaction, the heating temperature is 120 ° C, and the heating time is 26 hours; after the reaction, first filter and wash 2 times with deionized water, and then filter and wash with absolute ethanol for 2 times. times, soaked in ethanol solution for 24 hours, washed 3 times with absolute ethanol, and dried in a vacuum oven at 65°C for 26 hours to obtain NiFe-LDH powder;

[0036] Step (3) Dissolve 2.4 grams of NiFe-LDH powder in 1 liter of deionized water, and then add 0.12 grams of K 2 PdCl 4 and 0.03 g CuCl 2 .2H 2 O, fully dissolved; take NaBH with a concentration of 0.8mmol / L 4 The solut...

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Abstract

The invention discloses a preparation method of an electrocatalyst with a PdCu alloy particle loaded NiFe-LDH (layered double hydroxide) metal nanosheet material. The nickel nitrate hexahydrate-urea-triethylene glycol-ferric chloride hexahydrate composite catalyst is prepared by compounding nickel nitrate hexahydrate, urea, triethylene glycol, ferric trichloride hexahydrate, NaBH4, copper chloride dihydrate and potassium chloropalladate. The preparation method comprises the following steps: firstly, dissolving nickel nitrate hexahydrate in a mixed solution of deionized water and triethylene glycol, then adding ferric trichloride hexahydrate, and adding urea after ultrasonic dispersion; the preparation method comprises the following steps: adding NiFe-LDH into a reaction kettle, heating, reacting, washing and drying the reaction solution, dissolving the obtained NiFe-LDH powder in deionized water, adding K2PdCl4 and CuCl2. 2H2O, adding a NaBH4 solution, stirring, carrying out centrifugal treatment, washing and drying a centrifugal product to obtain a final product, adding deionized water, isopropanol and naphthol, and uniformly mixing to obtain a catalyst solution. The method is simple in process, low in energy consumption, mild in condition, good in product morphology and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a preparation method of a NiFe-LDH metal nanosheet material electrocatalyst supported by PdCu alloy particles. Background technique [0002] carbon dioxide (CO 2 ) is one of the main gases responsible for the greenhouse effect. At present, the carbon dioxide concentration in the atmosphere has increased dramatically over the past few decades due to the over-reliance and heavy use of fossil fuels by human activities, and the risk of global warming is increasing. At the same time, due to global climate fluctuations, the carbon balance between the four reservoirs of the biological layer, the earth layer, the air layer and the water layer is disturbed, posing a huge threat to the survival and development of human beings. Therefore, there is an urgent need to develop technically and economically feasible ways to reduce carbon dioxide levels in the atmosphere. [0003] Due to the li...

Claims

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Application Information

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IPC IPC(8): C25B11/067C25B11/089C25B3/09C25B3/07C25B3/26H01M4/92
CPCC25B11/067C25B11/089C25B3/09C25B3/07C25B3/26H01M4/921H01M4/925Y02E60/36
Inventor 叶伟徐梦秋
Owner HANGZHOU NORMAL UNIVERSITY
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