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Sulfur-doped carbon nanotube Pt-loaded catalyst for direct methanol fuel cell and preparation method of catalyst

A methanol fuel cell, carbon nanotube technology, applied in battery electrodes, circuits, electrical components, etc.

Active Publication Date: 2015-04-22
GUANGXI NORMAL UNIV
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  • Application Information

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Problems solved by technology

However, most of the above-mentioned doped carbon nanotube composites are prepared by chemical vapor deposition (CVD), by heat-treating poly-3,4-ethylenedioxythiophene (PEDOT) functionalized carbon nanotubes to prepare S-doped carbon Nanotube composites and their application to fuel cell anode electrocatalyst supports have not yet been reported in literature and patents

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  • Sulfur-doped carbon nanotube Pt-loaded catalyst for direct methanol fuel cell and preparation method of catalyst

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Embodiment

[0017] Such as figure 1 Shown, a kind of preparation method of direct methanol fuel cell sulfur-doped carbon nanotube loaded Pt catalyst, comprises the steps:

[0018] 1) Add 20 mg of acidified multi-walled carbon nanotubes (MWCNTs), sodium dodecyl sulfate (SDS) and 20–300 μL of 3,4-ethylenedioxythiophene (EDOT) in a container filled with triple distilled water. body, stirred at room temperature for 2 hours and then added 5 mg mL dropwise ?1 of (NH 4 ) 2 S 2 o 8 aqueous solution, and then continuously stirred for 24 hours, and the resulting product was centrifuged, washed and vacuum-dried to obtain a PEDOT functionalized MWCNTs composite material;

[0019] 2) PEDOT functionalized MWCNTs composite samples were placed in a tube furnace for heat treatment for 3 hours under nitrogen protection to obtain sulfur-doped MWCNTs composites;

[0020] 3) Add sulfur-doped MWCNTs with a mass ratio of Pt / sulfur-doped MWCNTs = 1 / 4 and 19.3 mM H in 20 mL of ethylene glycol 2 PtCl 6 , a...

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Abstract

The invention discloses a sulfur-doped carbon nanotube Pt-loaded catalyst for a direct methanol fuel cell and a preparation method of the catalyst. The preparation method comprises the following steps: (1) preparing a PEDOT functional MWCNTs composite material; (2) preparing a sulfur-doped MWCNTs composite material; and (3) obtaining the sulfur-doped MWCNTs Pt-loaded catalyst. The preparation method is simple in process and mild and controllable in operating condition, and deposited Pt nano particles are small in size and high in electrochemical activity superficial area and are uniformly dispersed on the sulfur-doped MWCNTs. The catalyst prepared by the method disclosed by the invention represents the characteristics of good electrochemical activity, high stability and strong anti-CO poisoning capacity on methanol oxidation.

Description

technical field [0001] The invention relates to the fields of electrocatalysis and fuel cells, in particular to a sulfur-doped carbon nanotube-supported Pt catalyst for a direct methanol fuel cell and a preparation method thereof. Background technique [0002] At present, the high cost and low electrocatalytic performance of direct methanol fuel cell anode electrocatalysts are still the main factors hindering its large-scale commercial application. Therefore, how to improve the utilization efficiency and electrocatalytic performance of the noble metal Pt in the catalyst has always been a hot issue in this field. [0003] The size, dispersion, and utilization efficiency of Pt nanoparticles in electrocatalysts are closely related to the catalyst supports used and their surface properties. Although carbon-supported Pt-based electrocatalysts are widely used as anode electrode materials for direct methanol fuel cells, due to factors such as the small pore size of the carrier car...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/8825H01M4/926Y02E60/50
Inventor 樊友军樊晶晶王睿翔
Owner GUANGXI NORMAL UNIV
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