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Method and application for synthesizing cheap nickel-iron nanosheet array high-efficiency electrocatalyst at normal temperature and normal pressure

A nanosheet array and electrocatalyst technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of harsh synthesis conditions, restrictions on large-scale production and application, and poor stability of nickel-iron catalysts for large-scale application, and achieve green and reliable Sustained hydrogen energy production, increased electron transfer rate, and improved catalytic performance

Active Publication Date: 2018-12-07
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing commercial oxygen evolution reaction catalyst is noble metal, the price is high and the stability is poor, the large-scale application is limited and the synthesis conditions of the existing nickel-iron catalyst are harsh, the process is complicated, and the cost is high, which seriously restricts its large-scale application. In order to solve the problem of large-scale production and application, and provide a method and application of synthesizing cheap nickel-iron nanosheet array high-efficiency electrocatalyst under normal temperature and pressure

Method used

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  • Method and application for synthesizing cheap nickel-iron nanosheet array high-efficiency electrocatalyst at normal temperature and normal pressure
  • Method and application for synthesizing cheap nickel-iron nanosheet array high-efficiency electrocatalyst at normal temperature and normal pressure
  • Method and application for synthesizing cheap nickel-iron nanosheet array high-efficiency electrocatalyst at normal temperature and normal pressure

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specific Embodiment approach 1

[0040] Embodiment 1: This embodiment is a method for synthesizing cheap nickel-iron nanosheet array high-efficiency electrocatalysts under normal temperature and pressure, which is completed according to the following steps:

[0041] 1. Pretreatment of nickel foam:

[0042] Immerse commercial nickel foam in dilute hydrochloric acid with a concentration of 2mol / L-4mol / L for 5min-10min, and after taking it out, first rinse it with absolute ethanol for 3-5 times, and then rinse it with distilled water for 3-5 times to obtain Nickel foam to remove impurities;

[0043] 2. Preparation of iron solution:

[0044] Dissolve the iron salt in deionized water, and then perform ultrasonication for 5-10 minutes to obtain an iron salt solution;

[0045]The concentration of the iron salt solution described in step 2 is 100mmol / L~300mmol / L;

[0046] 3. Soaking:

[0047] The foamed nickel from which impurities have been removed is soaked in the iron salt solution for 1 h to 10 h at room temp...

specific Embodiment approach 2

[0056] Embodiment 2: This embodiment differs from Embodiment 1 in that: the thickness of the commercialized nickel foam described in step 1 is 0.5 mm to 1 mm, and the pore diameter is 1 μm to 100 μm. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0057] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the iron salt described in step 2 is ferric nitrate nonahydrate. Other steps are the same as those in Embodiment 1 or 2.

[0058] In this embodiment, ferric nitrate nonahydrate is analytically pure.

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Abstract

The invention discloses a method and application for synthesizing a cheap nickel-iron nanosheet array high-efficiency electrocatalyst at normal temperature and normal pressure, and relates to a methodand application for synthesizing the high-efficiency electrocatalyst. The method and application aim to solve the problems that an existing commercial oxygen evolution reaction catalyst is noble metal, high in price and poor in stability, the large-scale application is limited, the synthesis condition of an existing nickel-iron catalyst is rigorous, the process is complex, the cost is high, and the large-scale production and application of the nickel-iron catalyst are seriously restricted. The method comprises the following steps that 1, pretreatment is carried out on foamed nickel; 2, an iron solution is prepared; and 3, soaking is carried out so as to obtain the nickel-iron nanosheet array high-efficiency electrocatalyst. According to the method, the large-scale production can be achieved, the method can be used for producing the nickel-iron nanosheet array high-efficiency electrocatalysts with different specifications, is suitable for commercial application, and is more suitable for the requirements of industrial production. According to the method, the nickel-iron nanosheet array high-efficiency electrocatalyst can be obtained.

Description

technical field [0001] The invention relates to a method and application for synthesizing high-efficiency electrocatalyst. Background technique [0002] The global energy problem and the accompanying serious environmental impact caused by the overexploitation of fossil energy have stimulated the research activities to develop clean and sustainable energy today. Due to its high energy density and carbon-free properties, hydrogen is considered to be a promising substitute for carbon-based fossil energy in the future. Among various hydrogen production methods, solar-driven electrolysis of water in alkaline electrolytes has received a lot of attention in the last decade. In the process of electrolyzing water, water is both the only raw material and the only by-product. The production method is environmentally friendly and the hydrogen produced is of high purity. Currently, an increasing number of reported works focus on designing high-efficiency rechargeable Zn-air battery-pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/04Y02E60/36
Inventor 王建龙岳智浩朱文新张天树李银鸽张怡
Owner NORTHWEST A & F UNIV
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