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Catalyst as well as preparation method and application thereof

A catalyst and reducing agent technology, applied in the field of catalysis, can solve the problem of high cost and achieve the effects of simple operation, good catalytic hydrogen evolution performance, and high catalytic activity

Active Publication Date: 2022-04-08
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, a large number of catalysts have been developed and should be used in basic HER. In some related technologies, Ir-based catalysts have been developed. However, pure Ir is used as a HER catalyst In other words, the cost is still high

Method used

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  • Catalyst as well as preparation method and application thereof
  • Catalyst as well as preparation method and application thereof
  • Catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The present embodiment has prepared a kind of catalyst, and concrete process is:

[0061] 1) Take 100mg of carbon black and use ultrasound (30min) to disperse it in 100ml of water, and dissolve 0.2mmol of ammonium chloropalladate in water to obtain a Pd / C mixture (the mass ratio of Pd / C is 20:100, refer to commercialization Pt / C catalyst loading);

[0062] 2) Add 1.84gCTAB;

[0063] 3) Prepare a 0.1mol / LSB solution, and add 0.5mmol SB to the solution obtained in step 2) in the form of a solution;

[0064] 4) After the solution treated in step 3) was left to stand (1 hour), after the reaction stopped, 4 μmol of iridium chloride hydrochloric acid solution was added, and a uniform solution was formed after stirring for 10 min;

[0065] 5) Add the SB solution prepared in step 3) containing 0.2 mmol SB;

[0066] 6) After the solution was left to stand for 1 hour, the obtained product was centrifuged to collect a sample and dried, and the obtained powder was the target pro...

Embodiment 2

[0068] A catalyst was prepared in this example, which differs from Example 1 only in that the added amount of iridium chloride was adjusted to 2 μmol.

Embodiment 3

[0070] A catalyst was prepared in this example, which differs from Example 1 only in that the added amount of iridium chloride was adjusted to 8 μmol.

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Abstract

The invention discloses a catalyst as well as a preparation method and application thereof. The catalyst includes an Ir-Pd monatomic alloy. The single atom alloy (SAAs) developed by the scheme of the invention has extremely high activity and ultrahigh large current stability, the cost of the catalyst is about 1 / 2 of that of a commercial Pt / C catalyst, the unit atom water electrolysis efficiency of the catalyst can reach more than two times of that of the commercial Pt / C catalyst, and the absolute performance is about 5 times. The catalyst provided by the scheme of the invention has good stability, and the stability of the catalyst can reach up to more than one month under a high-current working condition; the overpotential of the catalyst in a 1mol / L KOH solution is 16mV, which is far lower than that of other traditional catalysts in related technologies.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to a catalyst and its preparation method and application. Background technique [0002] Energy and the environment are one of the important issues involved in the sustainable development of human society. People are gradually developing from fossil fuels to sustainable and non-polluting non-fossil energy. Hydrogen is one of the ideal clean energy sources, and hydrogen production by electrolysis of water is an important means to achieve industrialization and low-cost production of hydrogen. In the process of water electrolysis, the efficiency of the electrocatalytic hydrogen evolution reaction (Electrocatalytic dehydrogenation, HER) is affected by the H in the solution. + concentration effect. Generally speaking, acidic electrolytes, such as sulfuric acid solutions, have HER activity about 2 to 3 orders of magnitude higher than that of alkaline electrolytes. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B1/50C25B11/089C25B11/097
CPCY02E60/36
Inventor 谷猛蔡超
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA