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Ruthenium-loaded nickel metal three-dimensional carbon sphere electrocatalyst as well as preparation method and application thereof

An electrocatalyst, metal technology, applied in electrodes, electrolysis components, electrolysis process and other directions, can solve the problems of high cost, high usage, low utilization rate of precious metals, etc., to improve the utilization rate, improve the development and utilization of hydrogen energy, high efficiency The effect of electrocatalytic activity

Pending Publication Date: 2022-07-08
QUZHOU RES INST OF ZHEJIANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims at the defects of low precious metal utilization rate, high usage and high cost in noble metal-based electrocatalysts in the prior art, and provides a ruthenium-loaded nickel metal three-dimensional carbon sphere electrocatalyst, which has a carbon skeleton coating The nickel metal and the ruthenium metal anchored inside the framework can have excellent catalytic activity for the hydrogen evolution reaction

Method used

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  • Ruthenium-loaded nickel metal three-dimensional carbon sphere electrocatalyst as well as preparation method and application thereof
  • Ruthenium-loaded nickel metal three-dimensional carbon sphere electrocatalyst as well as preparation method and application thereof
  • Ruthenium-loaded nickel metal three-dimensional carbon sphere electrocatalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0050] (1) take by weighing 0.9g nickel nitrate hexahydrate solid particles and 0.3g trimesic acid solid particles, be dissolved in the mixed solution of 80mL deionized water and ethanol, stir; The homogeneous mixed solution was stirred for 30 min to obtain a homogeneous solution.

[0051] The solution obtained above was transferred to a hydrothermal reaction kettle, and the hydrothermal reaction kettle was placed in an oven for hydrothermal reaction. The hydrothermal temperature was set to 160 ° C, and the heating time was 16 h. After the reaction, the water and ethanol were centrifuged and washed respectively Three times, the obtained product was vacuum-dried at 60°C to obtain a nickel-based organometallic framework;

[0052] (2) Weigh 300mg of nickel-based organometallic framework and dissolve it in 100ml of ethanol, and ultrasonicate 30min to obtain a uniformly dispersed solution; Weigh 5mg of ruthenium chloride, dissolve in 1ml of solution, and add the configured rutheniu...

Embodiment 2-3

[0056] According to the process of Example 1, in the process of step (3), heat treatment at 350 and 550 ° C is performed for the second step of heat treatment in an inert atmosphere, and the samples are denoted as Ru-Ni / C 350 ° C and Ru-Ni / C550℃.

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Abstract

The invention relates to the technical field of electrocatalysts, and discloses a ruthenium-loaded nickel metal three-dimensional carbon sphere electrocatalyst and a preparation method and application thereof.The preparation method comprises the steps that nickel salt and trimesic acid are dissolved, polyvinylpyrrolidone is added into the solution, a hydrothermal reaction is conducted, and a nickel-based organic metal framework is obtained; after dissolving, adding a ruthenium salt solution for ion exchange to obtain a ruthenium-loaded nickel-based catalyst; and carrying out first heat treatment and second heat treatment on the ruthenium-loaded nickel-based catalyst to obtain the three-dimensional carbon sphere electrocatalyst. According to the present invention, the nickel metal is coated with the carbon in the catalyst skeleton, the ruthenium metal is anchored, the excellent water dissociation property of the carbon-coated nickel is completely utilized, and the ruthenium hydrogen adsorption and desorption efficiency is improved so as to improve the utilization rate of the noble metal ruthenium, such that the electrocatalytic activity exceeding the electrocatalytic activity of the common commercial noble metal catalyst is provided, and the good stability is provided under the long-term work.

Description

technical field [0001] The invention relates to the technical field of electrocatalysts, in particular to a ruthenium-supported nickel metal three-dimensional carbon ball electrocatalyst and a preparation method and application thereof. Background technique [0002] Hydrogen energy is considered to be the most potential energy carrier due to its cleanliness, high energy density and high efficiency. Among the various existing hydrogen evolution methods, the electrolysis of water hydrogen production technology is considered to be an ideal green hydrogen production industry, and has been widely studied. At present, noble metal-based catalysts (such as Pt-based catalysts) are found to be the best electrocatalysts among the effective electrocatalysts for hydrogen evolution reaction, but considering the scarcity and expensive price of noble metals, how to improve the utilization rate of noble metals in catalysts, And efficient electrolysis of water for hydrogen production is of g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B1/04
CPCC25B11/091C25B1/04Y02E60/36
Inventor 侯阳王淋杨彬雷乐成李中坚
Owner QUZHOU RES INST OF ZHEJIANG UNIV