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A method for improving the electro-oxidation and anti-poisoning performance of methanol fuel cells

A methanol fuel cell and electro-oxidation technology, which is applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve the problems of easy poisoning and low utilization efficiency per unit mass, achieve lively properties, promote anti-poisoning ability, and improve electricity The effect of catalytic stability

Active Publication Date: 2020-12-04
UNIV OF JINAN
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Problems solved by technology

[0005] In view of the above-mentioned technical problems, the present invention solves the technical problems such as low utilization efficiency per unit mass and easy poisoning of Pt nanostructure catalysts in the electro-oxidation process of methanol fuel cells. By preparing a Pt-Ni binary alloy to support CeO 2 Preparation method to improve the performance of Pt-based nanostructured catalysts

Method used

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  • A method for improving the electro-oxidation and anti-poisoning performance of methanol fuel cells
  • A method for improving the electro-oxidation and anti-poisoning performance of methanol fuel cells
  • A method for improving the electro-oxidation and anti-poisoning performance of methanol fuel cells

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Embodiment 1

[0028] A Pt-Ni Binary Alloy Supporting CeO 2 The experimental steps of the preparation method are as follows:

[0029] (1) 1mL oleylamine corresponds to 3.44mg CeO 2 Add (a) 0mL (b) 0.1mL (c) 0.2mL and (d) 0.3mL respectively to the centrifuge tube, centrifuge once at 10000r / min for 15min, and absorb the supernatant with a pipette gun liquid until only the precipitate remains;

[0030] (2) Weigh 8mg platinum acetylacetonate and 12mg nickel acetylacetonate respectively in a clean beaker;

[0031] (3) Use a graduated cylinder to measure 9 mL of oleylamine and add it to the beaker in (2), pipette 1000 μL of oleic acid into the beaker, sonicate for 10 minutes until the solution is clear, and stir for 30 minutes;

[0032] (4) Pipette 800 μL (40%) formaldehyde solution, slowly drop it into the beaker, and continue to stir for 15 minutes until the solution is clear;

[0033] (5) Pipette 1ml of the clear and transparent solution into the centrifuge tube of step (1), disperse evenly...

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Abstract

The invention relates to a method for improving the electrooxidation anti-poisoning performance of a methanol fuel cell. The present invention utilizes a solvothermal method to synthesize Pt-Ni binary metal alloy loaded with cerium oxide in one step as a catalyst to carry out methanol electrooxidation. Specifically, oleylamine oleic acid is used as a dispersant to inhibit the growth of crystals, and the added formaldehyde can CeO 2 Inducing voids on the surface of Pt‑Ni alloys to explore whether rare earth metal oxides can improve the catalyst's resistance to CO poisoning and enhance its electrocatalytic effect. We take advantage of the voids in the Pt-Ni alloy group to synthesize very small diameter CeO 2 Added to the surface of the catalyst, using CeO 2 The strong oxidation effect on CO can be used to improve the CO poisoning resistance of metal catalysts and significantly improve their electrocatalytic stability.

Description

technical field [0001] The invention belongs to the field of fuel cells. Specifically, the present invention relates to an application for improving the electro-oxidation of a methanol fuel cell. Background technique [0002] So far, proton membrane fuel cells have become an efficient energy supply for cars and other portable devices. Pt-based catalysts are still the best catalysts in PEMFC, but the high price of metal platinum is the main reason why proton membrane fuel cells are difficult to produce on a large scale. Therefore, metals of other transition elements are added to form binary or ternary metal alloys to reduce the oxygen adsorption bond energy and reduce costs, but still face problems such as high catalyst costs and low actual utilization efficiency of precious metals. [0003] In fuel cells, platinum-based catalysts mainly catalyze organic fuels and help organic fuels react. Since organic fuels contain a large amount of C elements, the platinum-based catalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/92H01M4/88H01M8/1011
CPCH01M4/8878H01M4/9016H01M4/921H01M8/1011Y02E60/50
Inventor 高道伟李彬生吕一品杨绍寒陈国柱
Owner UNIV OF JINAN
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