High-performance titanium-based low-platinum catalyst, preparation method thereof and application of high-performance titanium-based low-platinum catalyst in fuel cell
A platinum catalyst, high-performance technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor catalyst effect, achieve the effects of avoiding dissolution/migration, improving utilization rate, and improving stability
Pending Publication Date: 2022-02-18
SICHUAN UNIV
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Problems solved by technology
[0004] The present invention intends to provide a high-performance titanium-based low-platinum catalyst to solve the technical problem of poor catalyst effect caused by the separate deposition of platinum and metal oxide nanoparticles on the surface of carbon materials
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Embodiment 1
[0037] A method for preparing a high-performance titanium-based low-platinum catalyst for fuel cells, the specific steps are as follows:
[0038] S1: Weigh 400 mg of X72R carbon powder and disperse it in 10 mL of deionized water, add a stirrer, stir evenly with a magnetic stirrer at room temperature for 10 min, and mark it as solution A; drop 1 mL of titanium isopropoxide into 10 mL of hydrochloric acid aqueous solution (hydrochloric acid and The volume ratio of water is 1:2-10, and the volume ratio of 1:10 is used here), and the solution is uniformly stirred by ultrasonic, which is marked as solution B. Mix A and B solutions, stir evenly, put the above-mentioned solution after mixing evenly into a 50mL polytetrafluoroethylene reactor, set the oven parameters to 170°C, and conduct a hydrothermal reaction for 5h. After the hydrothermal kettle was naturally cooled to room temperature, the solid obtained from the reaction was repeatedly washed with deionized water, filtered with ...
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Abstract
The invention relates to the technical field of catalysts for fuel cells, and particularly relates to a high-performance titanium-based low-platinum catalyst, a preparation method thereof and an application of the high-performance titanium-based low-platinum catalyst in a fuel cell. According to the scheme, vacancy oxygen (Ov) is introduced into titanium oxide through a ''two-step method'' and serves as a carrier, reduction of low-loading-capacity Pt particles through an atomic layer deposition technology is promoted, the Pt particles, TinOX and a carbon material form a ''three-junction'' structure, and the situation that the catalyst effect is poor due to the fact that Pt and metal oxide nanoparticles are independently deposited on the surface of the carbon material is avoided. The catalyst can be applied to manufacturing of a proton exchange membrane fuel cell, an alkaline anion exchange membrane fuel cell or a metal-air cell so that the cell performance is improved, and the cell cost is reduced by reducing the Pt content.
Description
technical field [0001] The invention relates to the technical field of catalysts for fuel cells, in particular to a high-performance titanium-based low-platinum catalyst, its preparation method and its application in fuel cells. Background technique [0002] As an emerging energy conversion device, fuel cells can directly and continuously convert the chemical energy of fuels and oxidants into electrical energy, and have the advantages of low noise, fast response, high modularity, high operating quality, and high energy conversion efficiency. To attract the attention of countries all over the world, it is widely used in transportation, energy storage power stations, aerospace and other fields. The cathode oxygen reduction reaction (Oxygen reduction reaction, ORR) kinetics of the fuel cell is slow, resulting in a large polarization (up to 300400mV), which greatly affects the output performance of the battery. Therefore, the mechanism study of cathode oxygen reduction reaction...
Claims
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Login to View More IPC IPC(8): H01M4/86H01M4/88H01M4/92H01M4/96
CPCH01M4/86H01M4/88H01M4/92H01M4/96Y02E60/50
Inventor 陈金伟王瑞林张洁陈奕含周玉凤王刚
Owner SICHUAN UNIV