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Oxide nanowire preparation method based on quantum dot modification

A nanowire and oxide technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of low proton conductivity, low utilization rate of nano-scale active components, and high cost of catalyst preparation

Inactive Publication Date: 2017-02-15
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low utilization rate of nano-scale active component Pt, low proton conductivity and high catalyst preparation cost in the mechanism of existing proton exchange membrane fuel cell catalyst performance decline, and provides a method based on Preparation method of quantum dot modified oxide nanowires to load Pt

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  • Oxide nanowire preparation method based on quantum dot modification

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specific Embodiment approach 1

[0008] Specific embodiment one: a kind of oxide nanowire preparation method based on quantum dot modification in the present invention can be realized according to the following steps: 1. Preparation of CeO by microwave-assisted ethylene glycol method 2 Nanowire; Two, the CeO prepared in step one 2 The nanowires were dispersed in a crucible filled with water. During the ultrasonic dispersion process, a certain amount of ionic liquid was pipetted with a pipette gun, and ultrasonically dispersed into a uniform slurry; 3. Dry the step-2 slurry at 70°C to obtain A compound of ionic liquid uniformly distributed on the surface, and then the compound is kept in a tube furnace under the protection of argon at 400°C for 60-90 minutes, and then cooled to room temperature with the furnace under the protection of argon to obtain nitrogen-doped carbon Modified CeO 2 Nanowires. The nanowires can be titanium dioxide nanowires, oxide nanowires such as Fe and Co, and the like.

[0009] Nitr...

specific Embodiment approach 2

[0010] Embodiment 2: This embodiment differs from Embodiment 1 in that: the way of adding microwave heating in step 1 is direct heating; the time required for direct heating is 30-60 minutes. Its steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the ionic liquid in Step 1 is polyvinylpyrrolidone or 1-ethyl-3-methylimidazolium dicyanamide. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses an oxide nanowire preparation method based on quantum dot modification, relates to a preparation method of a proton-exchange membrane fuel cell (PEMF-Cs) catalyst, and solves the problems that the attenuation of a fuel cell catalyst is accelerated after a complex circulation process including fuel supply, humidity, temperature, currents, voltage and the like the durability of a vehicle fuel cell is low, catalyst Pt utilization rate is low, and platinum loading is relative high. The method includes: using an oxide nanowire modified by quantum dots as the carrier, and forming the platinum-loaded quantum-dot-modified dense oxide nanowire catalyst under a certain condition according to the properties of the nanowire and substances used by the quantum dot modification. The preparation method has the advantages that the prepared proton-exchange membrane fuel cell catalyst is beneficial to a fast proton conduction function, and accordingly the activity and stability of the catalyst are increased; in addition, the catalyst is high in specific power density, high in energy conversion efficiency, green and free of pollution and capable of achieving fast starting under low temperature.

Description

technical field [0001] The invention relates to a method for preparing oxide nanowires based on quantum dot modification. Background technique [0002] After more than 20 years of continuous research and development and continuous breakthroughs, new energy vehicle fuel cell (proton exchange membrane fuel cell, PEMFCs) technology has the advantages of high specific power density, high energy conversion efficiency, green and pollution-free, and fast start-up at low temperature. The performance of the fuel cell vehicle basically meets the commercialization index. PEMFCs are considered to be the most ideal energy conversion device to replace traditional internal combustion engines as vehicle power, and have become a new energy vehicle that is currently attracting attention. However, PEMF Cs will experience complex cycle processes such as fuel supply, humidity, temperature, current, and voltage as the actual vehicle conditions change, resulting in accelerated decay of fuel cell ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/8817H01M4/925Y02E60/50
Inventor 初园园夏晓明司源
Owner TIANJIN POLYTECHNIC UNIV
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