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A kind of stress control catalyst thin film electrode and its preparation method and application

A thin-film electrode and stress control technology, which is applied in the direction of electrodes, electrolytic components, electrolytic process, etc., can solve the problems of large-scale commercialization of technology, and achieve the effect of low cost and simple preparation method

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high-cost alloying of precious metals is a significant limitation to the large-scale commercialization of these technologies

Method used

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  • A kind of stress control catalyst thin film electrode and its preparation method and application
  • A kind of stress control catalyst thin film electrode and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of a stress-regulating catalyst thin film electrode in this embodiment, the specific preparation steps are as follows:

[0029] (1) Strontium carbonate, lanthanum oxide and cobalt oxide are pressed by La 0.7 Sr 0.3 CoO 3 The stoichiometric ratio was mixed evenly by high-speed ball milling for 12 hours, and sintered in a muffle furnace at 1200°C to obtain La 0.7 Sr 0.3 CoO 3 powder, which is then pressed into a target in a mold;

[0030] (2) in LaAlO 3 (001) 10nm Au conductive network deposited by ion sputtering on a single crystal substrate (LAO);

[0031] (3) Using the target obtained in step (1) on the substrate on which the Au conductive network was deposited in step (2) by pulsed laser sputtering deposition (PLD) to obtain La with stress difference from the substrate 0.7 Sr 0.3 CoO 3 Thin film; PLD parameters are: substrate temperature 600°C, oxygen pressure 200Pa, laser energy 300mj, laser frequency 5Hz, deposition time 3min, laser frequenc...

Embodiment 2

[0034] The preparation of a stress-regulating catalyst thin film electrode in this embodiment, the specific preparation steps are as follows:

[0035] (1) Strontium carbonate, lanthanum oxide and cobalt oxide are pressed by La 0.7 Sr 0.3 CoO 3 The stoichiometric ratio was mixed evenly by high-speed ball milling for 12 hours, and sintered in a muffle furnace at 1200°C to obtain La 0.7 Sr 0.3 CoO 3 powder, which is then pressed into a target in a mold;

[0036] (2) in LaAlO 3 (001) 10nm Au conductive network deposited by ion sputtering on a single crystal substrate (LAO);

[0037] (3) Using the target obtained in step (1) on the substrate on which the Au conductive network was deposited in step (2) by pulsed laser sputtering deposition (PLD) to obtain La with stress difference from the substrate 0.7 Sr 0.3 CoO 3 Thin film; PLD parameters are: substrate temperature 600°C, oxygen pressure 200Pa, laser energy 300mj, laser frequency 5Hz, deposition time 6min, laser frequenc...

Embodiment 3

[0040]The preparation of a stress-regulating catalyst thin film electrode in this embodiment, the specific preparation steps are as follows:

[0041] (1) Strontium carbonate, lanthanum oxide and cobalt oxide are pressed by La 0.7 Sr 0.3 CoO 3 The stoichiometric ratio was mixed evenly by high-speed ball milling for 12 hours, and sintered in a muffle furnace at 1200°C to obtain La 0.7 Sr 0.3 CoO 3 powder, which is then pressed into a target in a mold;

[0042] (2) in SrTiO 3 (001) Deposit 10nm Au conductive network by ion sputtering on single crystal substrate (STO);

[0043] (3) Using the target obtained in step (1) on the substrate on which the Au conductive network was deposited in step (2) by pulsed laser sputtering deposition (PLD) to obtain La with stress difference from the substrate 0.7 Sr 0.3 CoO 3 Thin film; PLD parameters are: substrate temperature 600°C, oxygen pressure 200Pa, laser energy 300mj, laser frequency 5Hz, deposition time 3min, laser frequency 10H...

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Abstract

The invention belongs to the field of electrocatalytic materials, and discloses a stress-controlled catalyst film electrode and a preparation method and application thereof. Strontium carbonate, lanthanum oxide and cobalt oxide are mixed through ball milling according to a chemical metering ratio of La 0.7Sr 0.3CoO 3, are sintered, and are pressed as a La 0.7Sr 0.3CoO 3 target; then, pulse laser is sputtered on a SrTiO3(001) or LaAlO3(001) single crystal substrate of a Au electric conducting network for deposition of a La 0.7Sr 0.3CoO 3 film with stress differences; and the La 0.7Sr 0.3CoO 3 film is connected with a silver lead for packing to obtain the catalyst film electrode. The film with stress differences is obtained through lattice constant unmatched deposition between a substrate and the film, so that the catalysis activity of the electrode is controlled; and the preparation method has the advantages of simplicity and low cost.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, and in particular relates to a stress-regulating catalyst film electrode, a preparation method and application thereof. Background technique [0002] Fossil fuels, such as oil, natural gas and coal, are unsustainable, rapidly depleted and are the main cause of global climate change, toxic gas emissions and environmental degradation. Modern society is gradually and inevitably moving from a fossil fuel economy to a clean energy economy. Substantial scientific and engineering efforts have been devoted to improving the activity and stability of various electrochemical energy storage conversion devices, most widely concerned devices such as lithium-ion batteries, supercapacitors, low-temperature fuel cells, hydrogen storage technologies, and metal-air batteries, the main problem It is still about reducing costs and improving stability to make the technology commercially viable. [0003] Hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/08C23C14/18C23C14/34C25B11/06
CPCC23C14/08C23C14/185C23C14/3485C25B11/091
Inventor 陈燕刘茜朱云敏刘美林
Owner SOUTH CHINA UNIV OF TECH
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