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Metal-doped RuO2 nanocrystal catalyst as well as preparation method and application thereof

A nanocrystal, metal-doped technology, applied in electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of high price of Ir restricting large-scale applications, and the durability and electrochemical activity of electrocatalysts are difficult to meet large-scale practical applications. , to achieve excellent hydrogen evolution and oxygen absorption performance, good industrial application prospects, and low cost.

Pending Publication Date: 2022-02-15
GUANGXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, some Ir-based electrocatalysts with strong activity and excellent durability have been reported, but the scarcity and high price of Ir limit its large-scale application. At the same time, Ru, as a relatively cheap platinum group metal, can be used as a Ideal alternatives, however, currently reported RuO-based 2 The durability and electrochemical activity of electrocatalysts are difficult to meet large-scale practical applications, so by designing metal-doped RuO 2 Electrocatalysts to improve their stability and activity are feasible

Method used

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  • Metal-doped RuO2 nanocrystal catalyst as well as preparation method and application thereof
  • Metal-doped RuO2 nanocrystal catalyst as well as preparation method and application thereof
  • Metal-doped RuO2 nanocrystal catalyst as well as preparation method and application thereof

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Embodiment

[0021] A metal-doped RuO 2 A method for preparing a nanocrystal catalyst, the method comprising the preparation of a precursor M-BTC metal-organic framework MOF and the synthesis and annealing of MRu-BTC MOF derivatives, specifically:

[0022] 1) Add 180 mg H to a mixed solution containing 20 mL of ethanol and water 3 BTC, ultrasonically dispersed evenly, slowly and regularly added 20 mL ethanol and water mixed solution containing 286.4 mg Zn salt and 0.6 g PVP, after vigorous stirring, the stirring bar was sucked out and aged at room temperature for 10-30 h, centrifuged, washed and dried to obtain White Zn-BTC precursor;

[0023] 2) Disperse 50 mg of Zn-BTC nanoparticles prepared in 20 mL of H 2 O, add 2-5 mL RuCl three times under vigorous stirring 3 solution, adding 1 mL RuCl every 1 h 3 solution, centrifuged and dried after stirring at room temperature for 1d to obtain a black MOF derivative precursor (RuZn-BTC);

[0024] 3) Heat the MOF derivative precursor RuZn-BTC ...

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Abstract

The invention discloses a metal-doped RuO2 nanocrystal catalyst and a preparation method and application thereof.The method comprises the steps that different metal sources and isophthalic acid serve as ligands to synthesize different metal organic framework precursors, then Ru 3+ is introduced into a metal organic framework through ion exchange, and further annealing is carried out to synthesize the RuO2 nanocrystal doped with different metals. The method is simple in technological process, the raw materials are rich in source and low in cost, and the prepared catalyst has excellent hydrogen evolution and oxygen absorption performance and has a good industrial application prospect in water electrolysis application in a strong acid / alkali environment.

Description

technical field [0001] The invention relates to the fields of electrocatalysis and fuel cells, in particular to a metal-doped RuO 2 Nanocrystalline catalyst and its preparation method and application. Background technique [0002] The rise of new hydrogen production technologies, such as electrolysis of water to produce hydrogen and oxygen, provides an effective way to achieve sustainable energy development. The electrochemical water splitting process includes hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In general, the oxygen evolution reaction (OER) is easier to proceed in an alkaline environment, while the hydrogen evolution reaction (HER) is easier to proceed in an acidic environment because [H + ]*[OH - ] = 10 -14 The rules prevent them from obtaining high concentrations of H at the same time + and OH - . On the other hand, due to the different reaction mechanisms of HER and OER, it is almost impossible for an active site to catalyze two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/093
CPCC25B1/04C25B11/093Y02E60/36
Inventor 郑伏琴陈卫张晓霞张万富樊友军
Owner GUANGXI NORMAL UNIV
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