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Foamed nickel loaded nickel-copper-manganese metal nano electrocatalyst and preparation method thereof

A metal nanometer and electrocatalyst technology, applied in the field of electrocatalysis, can solve the problems of high cost, low efficiency and complex process, and achieve the effects of low cost, high efficiency and simple production process

Active Publication Date: 2021-12-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of Ni / Ni(OH) in the prior art 2 The structure has the problems of complex process, high cost and low efficiency. At the same time, due to the strong adsorption energy of Ni to *H, the Ni / Ni(OH) 2 Activity needs further improvement

Method used

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  • Foamed nickel loaded nickel-copper-manganese metal nano electrocatalyst and preparation method thereof
  • Foamed nickel loaded nickel-copper-manganese metal nano electrocatalyst and preparation method thereof
  • Foamed nickel loaded nickel-copper-manganese metal nano electrocatalyst and preparation method thereof

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preparation example Construction

[0032] The embodiment of the present invention discloses a preparation method of nickel-copper-manganese metal nanometer electrocatalyst supported by foamed nickel, comprising the following steps:

[0033] (1) Pre-treat the foamed nickel to remove the nickel oxide on its surface; specifically, you can first cut the foamed nickel with a size of 1cm*1cm, and then put the cut foamed nickel into hydrochloric acid for ultrasonic cleaning to remove the surface NiO x layer, and then washed with deionized water several times to remove residual acid on the surface, and finally dried in vacuum for later use.

[0034] (2) Dissolving water-soluble manganese salts, copper salts and nickel salts in deionized water according to a predetermined ratio to obtain a precursor solution, and adjusting the pH of the precursor solution to be acidic. Among them, the water-soluble manganese salt, copper salt and nickel salt can be manganese sulfate, copper sulfate and nickel sulfate, and ammonium sulf...

Embodiment 1

[0040] The preparation of foam nickel supported nickel-copper-manganese metal nanometer electrocatalyst in embodiment 1 comprises the steps:

[0041] ⑴Cut the nickel foam into a size of 1cm*1cm, put it in hydrochloric acid with a concentration of 6mol / L and sonicate it for 10min, wash it several times with deionized water, and dry it in vacuum at 60°C for 2 hours for later use. Among them, hydrochloric acid is used to remove surface oxides (NiO x ), repeated washing with deionized water is to remove residual hydrochloric acid on the foamed nickel.

[0042] (2) 1.2 mmol of copper sulfate pentahydrate (CuSO 4 ﹒ 5H 2 O), 1.2mmol of manganese sulfate monohydrate (MnSO 4 ﹒ h 2 O), 4mmol of nickel sulfate hexahydrate (NiSO 4 ﹒ 6H 2 O) and 2.6mmol ammonium sulfate ((NH 4 ) 2 SO 4 ), dispersed in 100ml of deionized water, and ultrasonicated for 20 minutes to obtain a uniformly mixed electrochemical deposition electrolyte with a pH of 4-5. Among them, the main function of am...

Embodiment 2-5

[0046] The preparation process of Examples 2-5 is the same as that of the NiCuMn catalyst in Example 1, the only difference is that the ratio of Cu and Mn is changed. Specifically, in Example 2-5, the molar amounts of Cu and Mn were adjusted to 1.5mmol and 0.9mmol, 0.9mmol and 1.5mmol, 0.6mmol and 1.8mmol, and 0.3mmol and 2.1mmol respectively, which will not be repeated here.

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Abstract

The embodiment of the invention discloses a foamed nickel loaded nickel-copper-manganese metal nano electrocatalyst and a preparation method thereof, and the preparation method comprises the following steps: (1) pretreating foamed nickel to remove nickel oxide on the surface of the foamed nickel; (2) dissolving a water-soluble manganese salt, a water-soluble copper salt and a water-soluble nickel salt in deionized water according to a preset proportion to obtain a precursor solution, and adjusting the pH value of the precursor solution to be acidic; and (3) taking the pretreated foamed nickel as a working electrode, and carrying out electro-deposition in the precursor solution to load nickel-copper-manganese metal nanoparticles on the foamed nickel; wherein the deposition potential ranges from-0.5 V to-1.2 V. The adsorption energy of Ni active sites to * H is optimized by doping the catalytic inert metal Cu, meanwhile, the Mn element with the electrode potential far lower than that of Ni and Cu is added, formation of a Ni / Ni (OH) 2 structure is promoted, the preparation method has the advantages of being simple in preparation process, low in cost and high in efficiency, and the prepared catalyst has excellent electro-catalytic performance on alkaline HER reaction.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis; more specifically, it relates to a non-noble metal nanometer electrocatalyst for hydrogen evolution reaction and a preparation method thereof. Background technique [0002] In recent years, hydrogen energy has attracted extensive attention due to its high energy density and high cleanliness. Among the existing hydrogen production technologies, hydrogen production by electrolysis of water can be said to have the most development potential, because the products of hydrolysis are only oxygen and hydrogen, which not only has zero pollution to the environment, but also can be used as a raw material for fuel cells, so electrolysis of water can fundamentally reduce environmental pollution. The pollution problem can also solve the energy crisis faced by mankind. [0003] However, the hydrogen evolution reaction (hydrogen evolution reaction, HER) on the cathode side of electrolyzed water needs t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/031C25B11/089C25B11/054C25B1/04C25D3/56C25D5/40C25D7/00
CPCC25B11/031C25B11/089C25B11/054C25B1/04C25D3/562C25D7/00C25D5/40Y02E60/36
Inventor 王劲松李智敏徐明丽张正富辛思思
Owner KUNMING UNIV OF SCI & TECH
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