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Direct methanol fuel cell anode catalyst and preparation method thereof

A methanol fuel cell and catalyst technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve problems such as unsatisfactory electrical conductivity, impact on performance and application, high specific surface area, etc., and improve the ability to resist CO poisoning , reduced band gap energy, and high catalytic oxidation performance

Active Publication Date: 2020-05-08
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But TiO 2 As a semiconductor, the conductivity is not ideal, and the catalyst needs to be doped with C when used, which affects its performance and application
[0004] Black phosphorus is a two-dimensional material that has been studied more in recent years. It has high conductivity, low band gap energy, and high specific surface area. It is compatible with TiO 2 The research and application of composite and used as methanol catalyst have not been reported yet

Method used

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preparation example Construction

[0021] The invention provides a method for preparing an anode catalyst for a direct methanol fuel cell, comprising the following steps:

[0022] 1) Pretreating the titanium plate to remove surface oil stains to obtain a titanium plate with a rough surface;

[0023] 2) Put the titanium plate obtained in step 1) into the electrolyte for anodic oxidation, then wash with deionized water, dry, and roast to obtain TiO 2 Nanotube / Ti;

[0024] 3) Heat-treat red phosphorus at 200°C for 2 hours to remove oxides and impurities on the surface, and grind for 15 minutes after cooling;

[0025] 4) TiO 2 The nanotubes / Ti were placed in a tube furnace, and the TiO 2 Place the nanotube / Ti around the red phosphorus obtained in step 3) at a rate of 5 cm per minute 3 Pass argon gas into the tube furnace at a high rate, raise the temperature to 600-1000°C, keep it for 4-5 hours, then cool it down to 350°C at a rate of 5°C per minute, keep it for 2 hours, and form a black phosphorus nano-layer d...

Embodiment 1

[0033](1) Pretreat the titanium plate of 20mm×20mm×0.3mm, specifically: polish the titanium plate with metallographic sandpaper, put it in acetone for ultrasonic degreasing for 15min, then clean it with methanol, and use a concentration of 1mol / L HF treatment for 10 min, ultrasonic cleaning in distilled water for 3 times, and drying.

[0034] (2) Place the pretreated titanium plate in the electrolyte, adjust the electrolysis potential to 20V, and carry out anodic oxidation for 80min. The concentration of HF in the electrolyte is 0.8wt%, and the H 2 SO 4 The concentration is 1mol / L, then washed with deionized water and dried, and roasted in air atmosphere in a muffle furnace at 500°C for 3h to obtain TiO 2 Nanotube / Ti.

[0035] (3) Heat-treat red phosphorus at 200°C for 2 hours to remove oxides and impurities on the surface, and grind for 15 minutes after cooling.

[0036] (4) TiO 2 The nanotubes / Ti were placed in a tube furnace, and the TiO 2 Red phosphorus is placed arou...

Embodiment 2

[0038] (1) Pretreat the titanium plate of 20mm×20mm×0.3mm, specifically: polish the titanium plate with metallographic sandpaper, put it in acetone for ultrasonic degreasing for 15min, then clean it with methanol, and use a concentration of 1mol / L HF treatment for 10 min, ultrasonic cleaning in distilled water for 3 times, and drying.

[0039] (2) Place the pretreated titanium plate in the electrolyte, adjust the electrolysis potential to 20V, and carry out anodic oxidation for 80min. The concentration of HF in the electrolyte is 0.8wt%, and the H 2 SO 4 The concentration is 1mol / L, then washed with deionized water and dried, and roasted in air atmosphere in a muffle furnace at 500°C for 3h to obtain TiO 2 Nanotube / Ti.

[0040] (3) Heat-treat red phosphorus at 200°C for 2 hours to remove oxides and impurities on the surface, and grind for 15 minutes after cooling.

[0041] (4) TiO 2 The nanotubes / Ti were placed in a tube furnace, and the TiO 2 Red phosphorus is placed aro...

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PUM

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Abstract

The invention belongs to the technical field of cell catalysts, and discloses a direct methanol fuel cell anode catalyst and a preparation method thereof. The preparation method comprises the steps: pretreating a titanium plate, and removing surface oil stains to obtain a rough surface; carrying out anodic oxidation of the pretreated titanium plate, performing washing through deionized water, performing drying and roasting to obtain TiO2 nanotube / Ti; performing heat treatment of red phosphorus, removing oxides and impurities on the surface, and performing grinding after cooling; putting TiO2 nanotubes / Ti into a tubular furnace, putting ground red phosphorus around the TiO2 nanotubes / Ti, introducing argon into the tubular furnace, performing heating and then cooling, performing further cooling to form a black phosphorus nano layer, and depositing the black phosphorus nano layer on the surface of the TiO2 nanotubes / Ti to obtain the anode catalyst for the direct methanol fuel cell. The obtained anode catalyst of the direct methanol fuel cell has high catalytic activity and CO poisoning resistance to methanol, and is low in cost.

Description

technical field [0001] The invention relates to the technical field of battery catalysts, in particular to a direct methanol fuel cell anode catalyst and a preparation method thereof. Background technique [0002] Direct Methanol Fuel Cell (DMFC) has the advantages of low energy consumption, high energy density, abundant sources of methanol, low price, simple system, convenient operation and low noise, and is considered to be the most promising future vehicle power and other vehicles. Promising chemical power sources have attracted widespread attention. One of the most critical materials of DMFC is the anode catalyst, which directly affects the performance, stability, service life and manufacturing cost of the battery. The noble metal Pt has excellent catalytic performance at low temperature (less than 80°C). At present, the anode catalysts of DMFC all use Pt as the main component, and the PtRu catalyst has stronger CO poisoning resistance and higher catalytic activity than...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/92H01M8/1011
CPCH01M4/8647H01M4/925H01M8/1011Y02E60/50Y02P70/50
Inventor 鞠剑峰鞠一逸章琴袁航于亚楠黄佩琳冯芸英
Owner NANTONG UNIVERSITY
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