Method for preparing catalytic electrode rich in crystal defects through pulse laser direct writing in liquid nitrogen environment

A pulsed laser, catalytic electrode technology, applied in electrodes, electrode coatings, electrolysis processes, etc., can solve the problems of high consumption of precious metal Pt, poor catalytic stability, low reactivity, etc. Strong control effect

Active Publication Date: 2022-01-11
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of low hydrogen production reaction activity, poor catalytic stability, and high amount of precious metal Pt in alkaline electrolysis water, and to provide a method of in-situ synthesis of rich Preparation method of platinum-nickel alloy catalytic electrode containing crystal defects

Method used

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  • Method for preparing catalytic electrode rich in crystal defects through pulse laser direct writing in liquid nitrogen environment
  • Method for preparing catalytic electrode rich in crystal defects through pulse laser direct writing in liquid nitrogen environment
  • Method for preparing catalytic electrode rich in crystal defects through pulse laser direct writing in liquid nitrogen environment

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Effect test

Embodiment 1

[0026] (1) Nickel foam (NF) was ultrasonically cleaned in distilled water and absolute ethanol for 5 minutes respectively, then soaked in 3M dilute hydrochloric acid for 20 minutes, taken out, washed repeatedly with distilled water, and then dried;

[0027] (2) Soak the NF treated in step (1) in 20 mL of 2mM chloroplatinic acid solution for 4 hours, take it out, wash it with distilled water, and dry it.

[0028] (3) The NF prepared in step (2) is fixed at the bottom of the open container and poured into liquid nitrogen to keep the liquid nitrogen liquid level higher than the nickel foam, such as figure 1 The synthetic process device diagram is shown.

[0029] (4) At room temperature, a millisecond laser is used to realize a defect-rich platinum-nickel alloy catalytic electrode with the assistance of a translation stage. Set the working range of the millisecond laser on the computer, set the frequency to 1 Hz, the laser energy to 9 J, and use a pulsed laser with a wavelength ...

Embodiment 2

[0033] (1) Nickel foam (NF) was ultrasonically cleaned in distilled water and absolute ethanol for 7 minutes respectively, then soaked in 3M dilute hydrochloric acid for 20 minutes, taken out, washed repeatedly with distilled water, and dried for later use;

[0034] (2) Soak the NF treated in step (1) in 27mL of 2mM chloroplatinic acid solution for 3h, take it out, wash it with distilled water, and dry it for later use.

[0035] (3) Fix the NF prepared in step (2) at the bottom of the open container and pour liquid nitrogen into it to keep the liquid nitrogen level higher than the nickel foam.

[0036] (4) At room temperature, a millisecond laser is used to realize the defect-rich platinum-nickel alloy nanostructure with the assistance of a translation stage. Set the working range of the millisecond laser on the computer, set the frequency to 1.2 Hz, the laser energy to 8 J, and use a pulsed laser with a wavelength of 1064 nm to irradiate for 50 min.

[0037] (5) After the la...

Embodiment 3

[0040] (1) Nickel foam (NF) was ultrasonically cleaned in distilled water and absolute ethanol for 8 minutes respectively, then soaked in 3M dilute hydrochloric acid for 20 minutes, taken out, washed repeatedly with distilled water, and dried for later use;

[0041] (2) Soak the NF treated in step (1) in 25mL of 3mM chloroplatinic acid solution for 4h, take it out, wash it with distilled water, and dry it for later use.

[0042] (3) Fix the NF prepared in step (2) at the bottom of the open container and pour liquid nitrogen into it to keep the liquid nitrogen level higher than the nickel foam.

[0043] (4) At room temperature, a millisecond laser is used to realize the defect-rich platinum-nickel alloy nanostructure with the assistance of a translation stage. Set the working range of the millisecond laser on the computer, set the frequency to 4 Hz, the laser energy to 11 J, and use a pulsed laser with a wavelength of 1064 nm to irradiate for 60 min.

[0044] (5) After the las...

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Abstract

The invention relates to a method for preparing a catalytic electrode rich in crystal defects through pulse laser direct writing in a liquid nitrogen environment. The method comprises the following steps: ultrasonically cleaning foamed nickel in distilled water and absolute ethyl alcohol respectively, soaking in diluted hydrochloric acid for 15-30 minutes, taking out the material, cleaning the material with distilled water, and drying the material; soaking the treated foamed nickel in a chloroplatinic acid solution, taking out the material, cleaning the material with distilled water, and drying the material; fixing the prepared foamed nickel to the bottom of an open container, pouring liquid nitrogen into the open container, and placing the open container in the container containing the liquid nitrogen so that the liquid level of the liquid nitrogen can be kept higher than the foamed nickel; at normal temperature, setting the working range of a millisecond laser on a computer by adopting the millisecond laser, and carrying out direct writing by using pulse laser; and moving out the obtained foamed nickel, cleaning with deionized water, and drying the foamed nickel to obtain the platinum-nickel alloy catalytic electrode rich in defects. The preparation method is simple and easy to implement, high in controllability and capable of achieving large-scale production.

Description

technical field [0001] The invention relates to a method for preparing a platinum-nickel-based catalytic electrode for hydrogen production by electrolysis of water, in particular to a method for preparing a platinum-nickel-based catalytic electrode for hydrogen production by electrolysis of water rich in crystal defects by direct writing of a pulsed laser in a liquid nitrogen environment. Background technique [0002] In recent years, hydrogen energy has become the most promising renewable energy to replace traditional energy due to its abundant reserves, cleanness and pollution-free. Among the many hydrogen production systems, electrolysis of water technology is based on the principle of electrochemical water splitting, using renewable electric energy to drive the decomposition of water into hydrogen and oxygen, which is considered to be the most promising and sustainable way to produce hydrogen. At present, the hydrogen production reaction (HER) of industrial electrolyzed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/031C25B11/046C25B1/04
CPCC25B11/031C25B11/046C25B1/04Y02E60/36
Inventor 杨静周苗张景彤
Owner TIANJIN UNIV
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