Ruthenium-based catalyst and preparation method and application thereof

A ruthenium-based catalyst and a ruthenium-based dichalcogenide technology, applied in the field of electrochemical catalysis, can solve problems such as high cost and poor acid resistance, and achieve the effects of high production efficiency, reduced production cost and good application prospects

Pending Publication Date: 2020-11-17
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a ruthenium-based catalyst and its preparation method and application, aiming to solve the technical problems of high cost and poor acid resistance existing in the existing noble metal catalysts

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  • Ruthenium-based catalyst and preparation method and application thereof
  • Ruthenium-based catalyst and preparation method and application thereof
  • Ruthenium-based catalyst and preparation method and application thereof

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preparation example Construction

[0031] Correspondingly, the embodiment of the present invention also provides a preparation method of a ruthenium-based catalyst, which includes the following steps:

[0032] S1. Provide carbon support, ruthenium source and precursors containing chalcogen elements;

[0033] S2. Mixing and annealing the carbon support, ruthenium source, and chalcogen-containing precursor to obtain a ruthenium-based catalyst.

[0034] The preparation method of the ruthenium-based catalyst provided by the embodiment of the present invention is to make the obtained ruthenium-based catalyst have higher catalytic activity and be in acidic solution and Both exhibited excellent electrochemical hydrogen evolution performance in alkaline solution systems. In addition, the preparation method of the ruthenium-based catalyst provided by the invention has controllable process conditions, good repeatability, high production efficiency, and effectively reduces production costs.

[0035]Specifically, in S1, ...

Embodiment 1

[0049] The present embodiment provides a kind of preparation method of ruthenium-based catalyst, comprises the following steps:

[0050] (11) Dissolve 1 g of carbon nanotubes (CNT) in 100 ml of concentrated nitric acid, stir for 1 h, ultrasonicate for 0.5 h, then place in an oil bath and heat to 100°C for reflux treatment, keep for 4 h, and cool down naturally. Use deionized water to carry out centrifugal washing, and then dry at 50°C for 10 hours under vacuum conditions to obtain oxidized carbon nanotubes;

[0051] (12) Add 100 mg of oxidized carbon nanotubes into 50 ml of deionized water, stir for 0.5 h, and sonicate for 1 h to disperse evenly. Add 30mg of ruthenium chloride, stir for 0.5h, sonicate for 1h, then freeze it quickly with liquid nitrogen, and dry it in a freeze dryer for 10h;

[0052] (13) put into the quartz boat after the mixture of carbon nanotube and ruthenium chloride is ground, place the central position of tube furnace, place the quartz boat that 200mg / L...

Embodiment 2

[0054] The present embodiment provides a kind of preparation method of ruthenium-based catalyst, comprises the following steps:

[0055] (21) Dissolve 1 g of carbon nanotubes (CNT) in 100 ml of concentrated nitric acid, stir for 1 h, ultrasonicate for 0.5 h, then place in an oil bath and heat to 100°C for reflux treatment, keep for 4 h, and cool down naturally. Use deionized water to carry out centrifugal washing, and then dry at 50°C for 10 hours under vacuum conditions to obtain oxidized carbon nanotubes;

[0056] (22) Add 100 mg of oxidized carbon nanotubes into 50 ml of deionized water, stir for 0.5 h, and sonicate for 1 h to disperse evenly. Add 30mg of ruthenium chloride, stir for 0.5h, sonicate for 1h, then freeze it quickly with liquid nitrogen, and dry it in a freeze dryer for 10h;

[0057] (23) put into the quartz boat after the mixture of carbon nanotube and ruthenium chloride is ground, place the central position of tubular furnace, place the quartz boat that 200m...

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Abstract

The invention belongs to the technical field of electrochemical catalysis, and particularly relates to a ruthenium-based catalyst as well as a preparation method and application thereof. The ruthenium-based catalyst comprises a carbon carrier and a ruthenium-based disulfide compound loaded on the carbon carrier, and belongs to a loaded catalyst. By loading the ruthenium-based disulfide compound onthe carbon carrier, the dispersity of ruthenium-based disulfide compound particles can be improved, and the carbon carrier can also provide a large number of pore structures, so that particle aggregation during high-temperature annealing treatment is avoided, and more active sites are provided. The cost of the ruthenium-based catalyst provided by the invention is remarkably lower than that of a Pt / C catalyst, and the ruthenium-based catalyst not only has higher catalytic activity, but also shows excellent electrochemical hydrogen evolution performance in an acidic solution and alkaline solution system, is expected to replace a commercial Pt / C catalyst, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of electrochemical catalysis, and in particular relates to a ruthenium-based catalyst and its preparation method and application. Background technique [0002] The increasing demand for energy and the deteriorating natural environment make human beings urgently look for sustainable new energy that is expected to be a substitute for traditional fossil energy. At present, energy technologies such as wind energy, solar energy, and tidal energy have been developed, but they all have an obvious The disadvantages of energy storage are volatility and intermittency, which make it difficult to store them on a large scale, resulting in a lot of waste and discarded electricity. In recent decades, hydrogen energy has received more and more attention, because it has the characteristics of high energy density, clean and pollution-free, and is considered as an ideal energy carrier. Through the hydrogen production technolo...

Claims

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Application Information

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IPC IPC(8): B01J27/045B01J37/20C25B11/08C25B1/04
CPCB01J27/045B01J37/20C25B1/04B01J35/33B01J35/40Y02E60/36
Inventor 姜诚张震李辉王海江
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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