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Simple electro-deposition Co-Ce/NF electrode material as well as preparation and application thereof

An electrode material and electrodeposition technology, applied in the field of hydrogen energy, can solve the problems of high hydrogen overpotential, low electrocatalytic efficiency, poor electrocatalytic behavior, etc., and achieve the effect of short experimental period, improved hydrogen evolution performance, and increased contact.

Active Publication Date: 2020-09-25
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, nickel-based alloys still exhibit poor electrocatalytic behavior compared with noble metals, including high hydrogen overpotential and low electrocatalytic efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The formulation of the electrodeposition solution:

[0034] Cobalt nitrate 1.0mmol

[0035] Cerium nitrate 0.6mmol

[0036] Ammonium chloride 5mmol

[0037] Deionized water 50ml.

[0038] Co-Ce / NF electrode material is prepared by the preparation method of following steps:

[0039] Dissolve 1.0mmol of cobalt nitrate, 0.6mmol of cerium nitrate and 5mmol of ammonium chloride in 50ml of deionized water, and ultrasonically disperse for 20 minutes to obtain an electrodeposition solution; then place the electrodeposition solution in the electrodeposition device, and connect the working electrode to 12mm×4mm× 1mm of nickel foam was electrodeposited for 2 hours at a scanning speed of 20mV / s to obtain Co-Ce / NF, rinsed with ethanol and water for 3 times, and then dried in a vacuum oven at 60°C for 16 hours to obtain the target product Co-Ce / NF electrode material.

[0040] The Co-Ce / NF electrode material prepared in Example 1 above was used as a hydrogen evolution catalytic ...

Embodiment 2

[0044] The formulation of the electrodeposition solution:

[0045] Cobalt nitrate 1.0mmol

[0046] Cerium nitrate 1.0mmol

[0047] Ammonium chloride 8mmol

[0048] Deionized water 40ml.

[0049] Co-Ce / NF electrode material is prepared by the preparation method of following steps:

[0050] Dissolve 1.0mmol cobalt nitrate, 1.0mmol cerium nitrate and 8mmol ammonium chloride in 40ml deionized water, and ultrasonically disperse for 30 minutes to obtain an electrodeposition solution; place the electrodeposition solution in the electrodeposition device, and connect the working electrode to 12mm×2mm×1mm Nickel foam was electrodeposited at a scanning speed of 80mV / s for 2h to obtain Co-Ce / NF, rinsed with ethanol and water for 3 times, and then dried in a vacuum oven at 80°C for 20h to obtain the target product Co-Ce / NF electrode material.

[0051] The Co-Ce / NF electrode material prepared in Example 2 above was used as a hydrogen evolution catalytic electrode. The hydrogen evolution...

Embodiment 3

[0055] The formulation of the electrodeposition solution:

[0056] Cobalt nitrate 0.8mmol

[0057] Cerium nitrate 0.3mmol

[0058] Ammonium chloride 5mmol

[0059] Deionized water 30ml.

[0060] Co-Ce / NF electrode material is prepared by the preparation method of following steps:

[0061] Dissolve 0.8mmol cobalt nitrate, 0.3mmol cerium nitrate and 5mmol ammonium chloride in 30ml deionized water, and ultrasonically disperse for 10 minutes to obtain an electrodeposition solution; place the electrodeposition solution in the electrodeposition device, and connect the working electrode to 15mm×5mm×1mm Nickel foam was electrodeposited at a scanning speed of 200mV / s for 40min to obtain Co-Ce / NF, rinsed with ethanol and water for 4 times, and then dried in a vacuum oven at 60°C for 24h to obtain Co-Ce / NF electrode material .

[0062] The Co-Ce / NF electrode material prepared in Example 3 above was used as a hydrogen evolution catalytic electrode. The hydrogen evolution catalytic e...

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Abstract

The invention relates to a simple electro-deposition Co-Ce / NF electrode material and preparation and application thereof.The preparation method comprises the following steps: (1) dissolving a cobalt source, a cerium source and ammonium chloride in deionized water and mixing the components until the solution is clear, thereby preparing an electro-deposition solution; (2) in an electro-deposition device filled with the electro-deposition solution in the step (1), with foamed nickel as a working electrode for connection, a silver chloride electrode as a reference electrode and a platinum wire electrode as a counter electrode, preparing a Co-Ce / NF material through a one-step electro-deposition method; and (3) washing and drying the obtained Co-Ce / NF material to obtain the target product Co-Ce / NF electrode material. Compared with the prior art, according to the Co-Ce / NF electrode material synthesized by the invention, rare earth elements cerium and cobalt form an alloy to generate a synergistic effect; the electrochemical performance of the cobalt alloy is improved by using the activity of rare earth elements, the surface area of the material is increased by using foamed nickel as a carrier, and in addition, the synthesis method is simple, convenient, low in energy consumption and excellent in electrochemical performance and is expected to be applied to industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of hydrogen energy, and relates to a simple electrodeposited Co-Ce / NF electrode material and its preparation and application. Background technique [0002] Hydrogen energy is currently recognized as a sustainable and most promising clean energy that can replace fossil fuels in the future. Splitting water in alkaline solution is an efficient method widely used for hydrogen production. In recent years, great efforts have been made to obtain electrode materials with low hydrogen overpotential and high catalytic efficiency. Generally, Pt and other noble metals have been proposed as optimal electrocatalysts for the hydrogen evolution reaction (HER). However, its widespread application in large-scale industrial hydrogen production is limited due to its scarcity and high cost. Therefore, promoting the development of earth-abundant new electrode materials to replace noble metal electrocatalysts remains a critical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/03C25B1/04C25D3/56B01J23/83B01J37/34
CPCC25B1/04C25D3/562B01J23/83B01J37/348B01J35/33Y02E60/36
Inventor 蒋继波陈宇凯丛海山唐佳斌胡晓敏王露露杨圆圆马健韩生
Owner SHANGHAI INST OF TECH
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