Amorphous lanthanum nickelate film composite electrode, and preparation method and application thereof

A composite electrode, lanthanum nickelate technology, applied in electrodes, electrolysis components, electrolysis process and other directions, can solve the problems of reduced catalytic performance, common thin films are not easy to electrocatalytic reaction, easy to be corroded and fall off active sites, etc.

Active Publication Date: 2021-07-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an amorphous lanthanum nickelate thin film composite electrode and its preparation method and application, which can solve the problem that ordinary thin films are not easy to directly participate in the electrocatalytic reaction, are easily corroded and peeled off during the reaction process, and have few active sites leading to reduced catalytic performance. And other issues

Method used

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  • Amorphous lanthanum nickelate film composite electrode, and preparation method and application thereof
  • Amorphous lanthanum nickelate film composite electrode, and preparation method and application thereof
  • Amorphous lanthanum nickelate film composite electrode, and preparation method and application thereof

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Embodiment 1

[0041] This embodiment provides a method for preparing an amorphous lanthanum nickelate thin film composite electrode, comprising the following steps:

[0042] (1) Preparation of lanthanum nickelate target

[0043] La with a purity of 99.9% 2 o 3Mix and grind with NiO powder at an atomic ratio of La and Ni of 1:1, sinter at 900°C for 10 hours, put it into a mold with a radius and a height of 5mm, press it into a columnar body, and sinter 12 pieces at a high temperature of 1200°C hours, made of LaNiO 3 target;

[0044] (2) Substrate pretreatment

[0045] Polish the glassy carbon sheet with a size of 10mm*10mm smooth with alumina, then ultrasonically clean the glassy carbon sheet with acetone, absolute ethanol and deionized water for 10 minutes respectively, and dry it with a nitrogen gun after ultrasonic cleaning;

[0046] (3) Preparation of composite electrodes

[0047] The pretreated glassy carbon sheet and LaNiO 3 The targets are all placed on the sample stage of the ...

Embodiment 2

[0054] This embodiment provides a method for preparing an amorphous lanthanum nickelate thin film composite electrode, comprising the following steps:

[0055] (1) Preparation of lanthanum nickelate target

[0056] La with a purity of 99.9% 2 o 3 Mix and grind NiO powder at an atomic ratio of La and Ni of 1:1, sinter at 1000°C for 12 hours, put it into a mold with a radius and a height of 5mm, press it into a columnar body, and sinter 12 pieces at a high temperature of 1300°C hours, made of LaNiO 3 target;

[0057] (2) Substrate pretreatment

[0058] Polish the glassy carbon sheet with a size of 10mm*10mm smooth with alumina, then ultrasonically clean the glassy carbon sheet with acetone, absolute ethanol and deionized water for 20 minutes respectively, and dry it with a nitrogen gun after ultrasonic cleaning;

[0059] (3) Preparation of composite electrodes

[0060] The pretreated glassy carbon sheet and LaNiO 3 The targets are all placed on the sample stage of the pul...

Embodiment 3

[0063] This embodiment provides a method for preparing an amorphous lanthanum nickelate thin film composite electrode, comprising the following steps:

[0064] (1) Preparation of lanthanum nickelate target

[0065] La with a purity of 99.9% 2 o 3 Mix and grind NiO powder at an atomic ratio of La and Ni of 1:1, sinter at 800°C for 10 hours, put it into a mold with a radius and a height of 5mm, and press it into a columnar body, and sinter 13 pieces at a high temperature of 1100°C hours, made of LaNiO 3 target;

[0066] (2) Substrate pretreatment

[0067] Polish the glassy carbon sheet with a specification of 10mm*10mm smooth with alumina, then ultrasonically clean the glassy carbon sheet with acetone, absolute ethanol and deionized water for 15 minutes respectively, and dry it with a nitrogen gun after ultrasonic cleaning;

[0068] (3) Preparation of composite electrodes

[0069] The pretreated glassy carbon sheet and LaNiO 3 The targets are all placed on the sample stag...

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Abstract

The invention discloses an amorphous lanthanum nickelate film composite electrode, and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a lanthanum nickelate target material; (2) pretreating a substrate; and (3) preparing the composite electrode. By preparing the amorphous lanthanum nickelate film, more active sites can be provided; and the amorphous lanthanum nickelate film covers the glassy carbon sheet substrate, so that conductivity can be provided. When the composite electrode covered with the amorphous lanthanum nickelate film is applied to an OER electro-catalysis system, the catalytic activity and durability in an alkaline solution can be effectively improved, and the OER reaction is effectively catalyzed and promoted.

Description

technical field [0001] The invention relates to the technical field of composite electrode preparation, in particular to an amorphous lanthanum nickelate thin-film composite electrode and its preparation method and application. Background technique [0002] Due to a series of severe challenges such as energy shortage and ecological environment deterioration, it is imperative to develop and promote clean and sustainable energy. Among the existing technologies, catalytic water splitting is considered to be one of the most promising strategies. However, in the process of energy conversion, the rate of conversion is constrained by the slow kinetic process of oxygen evolution reaction (OER), which usually requires a large overpotential to initiate the fundamental chemical reaction to achieve the desired current density. . This also hinders the development of the core of new energy technology, greatly reducing the efficiency of metal-air batteries, fuel cells and water splitting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/077C23C14/08C23C14/34C25B1/04
CPCC25B1/04C23C14/08C23C14/3485Y02E60/36
Inventor 乔梁黄晨王勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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