PT-loaded Ni0.8Fe0.2/Niooh/Feooh mixed crystal composite electrode and preparation method thereof

A ni0.8fe0.2, composite electrode technology, used in battery electrodes, circuits, fuel cells, etc., can solve problems such as poor durability, and achieve the effects of good durability, poor durability, excellent activity and long-term durability

Active Publication Date: 2022-02-11
CHENGDU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned problems existing in the prior art, the present invention provides a Pt-loaded Ni0.8Fe0.2 / NiOOH / FeOOH mixed crystal composite electrode and its preparation method, between Ni0.8Fe0.2 / NiOOH / FeOOH and noble metal Pt Under the strong interaction between them, the OOH produced + React with CO produced by incomplete oxidation of methanol to achieve the effect of "detoxification", effectively solving the problem of poor durability caused by incomplete oxidation of methanol fuel cell catalysts in the MOR reaction process in the prior art

Method used

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  • PT-loaded Ni0.8Fe0.2/Niooh/Feooh mixed crystal composite electrode and preparation method thereof
  • PT-loaded Ni0.8Fe0.2/Niooh/Feooh mixed crystal composite electrode and preparation method thereof
  • PT-loaded Ni0.8Fe0.2/Niooh/Feooh mixed crystal composite electrode and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] A Pt-loaded Ni0.8Fe0.2 / NiOOH / FeOOH mixed crystal composite electrode, and its preparation method comprises the following steps:

[0032] (1) The glassy carbon sheet was ultrasonically washed for 3 minutes, then placed in 0.05g of alumina powder for mechanical polishing, and then placed in the washing solution for ultrasonic washing again to remove the surface alumina powder and surface static electricity, and vacuum-dried to obtain pretreated glassy carbon sheet; the washing solution includes absolute ethanol and deionized water, and the volume ratio of absolute ethanol and deionized water is 10:20;

[0033] (2) Fix the pretreated glassy carbon sheet obtained in step (1) on the sample stage of the pulsed laser deposition system, fix the nickel-iron alloy target on the rotating target stage, the pulse width of the laser source is 4ns, the laser repetition frequency is 5Hz, and the pulse Laser deposition for 20 minutes to obtain a glassy carbon sheet loaded with a nickel-...

Embodiment 2

[0037] A Pt-loaded Ni0.8Fe0.2 / NiOOH / FeOOH mixed crystal composite electrode, and its preparation method comprises the following steps:

[0038] (1) The glassy carbon sheet was ultrasonically washed for 5 minutes, then placed in 0.05g of alumina powder for mechanical polishing, and then placed in the washing solution for ultrasonic washing again to remove the surface alumina powder and surface static electricity, and vacuum-dried to obtain pretreated glassy carbon sheet; the washing solution includes absolute ethanol and deionized water, and the volume ratio of absolute ethanol and deionized water is 10:30;

[0039](2) Fix the pretreated glassy carbon sheet obtained in step (1) on the sample stage of the pulsed laser deposition system, and fix the nickel-iron alloy target on the rotating target stage. The pulse width of the laser light source is 5 ns, and the laser repetition frequency is 10 Hz. Laser deposition for 35 minutes to obtain a glassy carbon sheet loaded with a nicke...

Embodiment 3

[0043] A Pt-loaded Ni0.8Fe0.2 / NiOOH / FeOOH mixed crystal composite electrode, and its preparation method comprises the following steps:

[0044] (1) The glassy carbon sheet was ultrasonically washed for 7 minutes, then placed in 0.05g of alumina powder for mechanical polishing, and then placed in the washing solution for ultrasonic washing again to remove the surface alumina powder and surface static electricity, and vacuum-dried to obtain pretreated glassy carbon sheet; the washing liquid comprises absolute ethanol and deionized water, and the volume ratio of absolute ethanol and deionized water is 10:40;

[0045] (2) Fix the pretreated glassy carbon sheet obtained in step (1) on the sample stage of the pulsed laser deposition system, and fix the nickel-iron alloy target on the rotating target stage. The pulse width of the laser source is 6 ns, and the laser repetition frequency is 15 Hz. Laser deposition for 50 minutes to obtain a glassy carbon sheet loaded with a nickel-iron...

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Abstract

The invention provides a Pt-loaded Ni0.8Fe0.2 / NiOOH / FeOOH mixed crystal composite electrode and a preparation method thereof. The preparation method comprises the following steps: mechanically polishing a glassy carbon sheet after ultrasonic washing, ultrasonic washing, vacuum drying, Obtain a pretreated glassy carbon sheet; fix the pretreated glassy carbon sheet on the sample stage of the pulsed laser deposition system, fix the nickel-iron alloy target on the rotating target stage, and obtain the glassy carbon sheet loaded with the nickel-iron alloy thin film; establish a three-electrode deposition system, A Ni0.8Fe0.2 / NiOOH / FeOOH composite is obtained; Pt is deposited on a glassy carbon sheet supporting the Ni0.8Fe0.2 / NiOOH / FeOOH composite to obtain a mixed crystal composite electrode. The present invention also includes the composite electrode prepared by the above method. The invention effectively solves the problem of poor durability caused by incomplete oxidation of the MOR reaction process of the methanol fuel cell catalyst in the prior art.

Description

technical field [0001] The invention belongs to the technical field of composite electrodes, and in particular relates to a Pt-loaded Ni0.8Fe0.2 / NiOOH / FeOOH mixed crystal composite electrode and a preparation method thereof. Background technique [0002] Among a series of efficient, renewable, and environmentally friendly energy storage systems, fuel cells have emerged as one of the most versatile devices that generate energy in the form of electricity through redox-mediated electrochemical conversion of chemical energy. Fuel cells are classified according to the electrolyte used or the operating temperature of the cell. For example, alkaline fuel cells, polymer electrolyte fuel cells, direct methanol fuel cells (DMFC), and phosphoric acid fuel cells are low temperature fuel cells, while molten carbonate fuel cells and solid oxide fuel cells are high temperature fuel cells. Among them, DMFC has great practical application prospects in transportation and portable equipment a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/92H01M4/86H01M8/1011
CPCH01M4/8825H01M4/925H01M4/8652H01M4/8657H01M8/1011Y02E60/50
Inventor 吴小强雍朝友安旭光
Owner CHENGDU UNIV
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