Preparation method of bismuth-doped bimetallic sulfide electrode for electro-catalytic oxidation of urea

An electrocatalytic oxidation and bimetallic technology, applied in the field of nanomaterials, can solve the problem of high cost and achieve the effects of low cost, excellent electrocatalytic performance, and improved hydrogen production efficiency

Active Publication Date: 2020-12-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problem of high cost of traditional urea oxidation electrocatalytic materials, the present invention provides a preparation method of a bismuth-doped bimetallic sulfide electrode for electrocatalytic oxidation of urea

Method used

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  • Preparation method of bismuth-doped bimetallic sulfide electrode for electro-catalytic oxidation of urea
  • Preparation method of bismuth-doped bimetallic sulfide electrode for electro-catalytic oxidation of urea
  • Preparation method of bismuth-doped bimetallic sulfide electrode for electro-catalytic oxidation of urea

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Cut out 1cm*3cm nickel foam, ultrasonically clean it with dilute hydrochloric acid, ethanol, and deionized water for 5 minutes each, and set aside;

[0031] (2) Take a clean beaker, add 25ml deionized water, weigh 0.043g Na 2 BiO 4 2H 2 O, 0.36g Co(NO 3 ) 2 ·6H 2 O and 0.36g Ni(NO 3 ) 2 ·6H 2 O was poured into deionized water, weighed 0.24g 2-methylimidazole and poured into the metal salt mixed solution, ultrasonically dissolved, and poured into a 50 ml reaction kettle; the nickel foam pretreated in step (1) was added to the reaction place in an oven and heat to 120°C, react for 8 hours, and cool down to room temperature naturally after the reaction stops; take out the nickel foam, put it in deionized water for 30 seconds to remove surface deposits, and vacuum dry at 60°C for 12 hours;

[0032] (3) Foamed nickel treated in step (2) in N 2 In the atmosphere, the temperature was raised to 300°C at a rate of 5°C / min, and then the crucible containing 100mg of s...

Embodiment 2

[0045] (1) Cut out 1cm*3cm nickel foam, ultrasonically clean it with dilute hydrochloric acid, ethanol, and deionized water for 5 minutes each, and set aside;

[0046] (2) Take a clean beaker, add 25ml deionized water, weigh 0.043g Na 2 BiO 4 2H 2 O, 0.42g Co(NO 3 ) 2 ·6H 2 O and 0.08g Ni(NO 3 ) 2 ·6H 2 O was poured into deionized water, weighed 0.24g 2-methylimidazole and poured into the metal salt mixed solution, ultrasonically dissolved, and poured into a 50 ml reaction kettle; the nickel foam pretreated in step (1) was added to the reaction place in an oven and heat to 110°C, react for 10 hours, and naturally cool down to room temperature after the reaction stops; take out the nickel foam, put it in deionized water for 30 seconds to remove surface deposits, and vacuum dry at 60°C for 12 hours;

[0047] (3) Foamed nickel treated in step (2) in N 2 In the atmosphere, the temperature was raised to 200 °C at a rate of 10 °C / min, and then the crucible containing 150 mg...

Embodiment 3

[0050] (1) Cut out 1cm*3cm nickel foam, ultrasonically clean it with dilute hydrochloric acid, ethanol, and deionized water for 5 minutes each, and set aside;

[0051] (2) Take a clean beaker, add 25ml deionized water, weigh 0.06g Na 2 BiO 4 2H 2 O, 0.36g Co(NO 3 ) 2 ·6H 2 O and 0.08g Ni(NO 3 ) 2 ·6H 2 O was poured into deionized water, weighed 0.24g 2-methylimidazole and poured into the metal salt mixed solution, ultrasonically dissolved, and poured into a 50 ml reaction kettle; the nickel foam pretreated in step (1) was added to the reaction place in an oven and heat to 180°C, react for 6 hours, and naturally cool down to room temperature after the reaction stops; take out the nickel foam, put it in deionized water for 30 seconds to remove surface deposits, and vacuum dry at 60°C for 12 hours;

[0052] (3) Foamed nickel treated in step (2) in N 2 In the atmosphere, the temperature was raised to 200 °C at a rate of 10 °C / min, and then the crucible containing 120 mg o...

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Abstract

The invention relates to the technical field of nano materials, in particular to a preparation method of a bismuth-doped bimetallic sulfide electrode for electrocatalytic oxidation of urea. The methodcomprises the following steps of: (1) dissolving a cobalt source, a nickel source, a bismuth source and an organic ligand in deionized water to obtain a mixed solution, adding a conductive substrate,carrying out hydrothermal reaction, taking out the conductive substrate, and performing washing and drying; and (2) carrying out vulcanization treatment in a nitrogen atmosphere to obtain the bismuth-doped bimetallic sulfide urea oxidation electrocatalyst. The preparation method has the advantages that the raw material cost is low, the synthesis process is simple, the reaction conditions are easyto achieve, the prepared self-supporting efficient urea oxidation electrocatalytic material heterojunction nanosheet array is uniform in size, stable in structure and uniform in component distribution, and the material is endowed with better electrocatalytic performance and stability; the urea oxidation electrocatalyst grows on a conductive substrate in situ, becomes a flexible and self-supporting material, can be directly used as a catalyst, and does not need to be coated on an electrode.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a method for preparing a bismuth-doped bimetallic sulfide electrode for electrocatalytic oxidation of urea. Background technique [0002] With the gradual increase in energy demand and environmental concerns, efficient hydrogen production technologies are necessary to realize the transition from fossil fuels to clean, sustainable, and cheap hydrogen fuels. As a clean and environmentally friendly energy with abundant reserves and high energy density, hydrogen has a good development prospect. [0003] Among the many hydrogen production methods, hydrogen production by electrolysis of water is more environmentally friendly and efficient. However, the anodic oxygen evolution reaction (OER) is a four-electron reaction with very slow reaction kinetics, resulting in a high overpotential. This high overpotential limits the large-scale practical application of water electroly...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B3/02B01J27/043B01J37/10B01J37/20B82Y30/00B82Y40/00
CPCB01J27/043B01J37/10B01J37/20B82Y30/00B82Y40/00B01J35/33B01J35/40
Inventor 曹澥宏俞林海刘文贤毋芳芳
Owner ZHEJIANG UNIV OF TECH
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