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A method for improving the electrooxidation anti-CO performance of formic acid fuel cell

A formic acid fuel cell, electro-oxidation technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low utilization efficiency per unit mass of Pt nanostructure catalysts, easy poisoning, etc., achieve excellent area specific activity and improve stability , to ensure the effect of utilization efficiency

Active Publication Date: 2020-12-08
UNIV OF JINAN
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Problems solved by technology

[0005] Aiming at 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 current formic acid fuel cell electrooxidation process, and prepares a Pt-Ni-Cu ternary alloy loaded CeO 2 Preparation method to improve the performance of Pt-based nanostructured catalysts

Method used

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  • A method for improving the electrooxidation anti-CO performance of formic acid fuel cell
  • A method for improving the electrooxidation anti-CO performance of formic acid fuel cell
  • A method for improving the electrooxidation anti-CO performance of formic acid fuel cell

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Embodiment 1

[0025] A Pt-Ni-Cu Ternary Alloy Supporting CeO 2 The experimental steps of the preparation method are as follows:

[0026] (1) Fully ultrasonically disperse the original solution of 1 mL oleylamine corresponding to 3.44 mg CeO2, add (a) 0 mL (b) 0.07 mL (c) 0.2 mL and (d) 0.3 mL respectively to centrifuge tubes, centrifuge, and use Pipette the supernatant until only the precipitate remains. Add 0.7 mL of ethanolamine to ultrasonically disperse to make it evenly dispersed;

[0027] (2) Weigh 303.4 mg of glycine, 200 mg of polyvinylpyrrolidone (PVP), and 300 mg of sodium iodide into a clean beaker;

[0028] (3) Add 2 mL of 20 mM H 2 PtCl 6 aqueous solution, 1 mL of 20 mM CuCl 2 aqueous solution, 1 mL of 20mM NiCl 2 The aqueous solution is added into the beaker of the sample in step (2), and the fully dispersed CeO-containing 2 Add ethanolamine to the above beaker, stir for 24 h until the solution is blue and transparent, pipette 600 µL (40%) formaldehyde solution, slowly ...

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Abstract

The invention relates to a method for improving the anti-CO performance of formic acid fuel cell electrooxidation. The present invention utilizes a microwave thermal method to synthesize Pt-Ni-Cu ternary metal alloy loaded ceria nanoparticles in one step as a catalyst to carry out formic acid electro-oxidation. Specifically, the added formaldehyde can convert CeO 2 Inducing surface voids during the formation of concave octahedral Pt‑Ni‑Cu alloys not only preserves the morphology of the Pt‑Ni‑Cu ternary metal, but also allows the resulting nanoparticles to continue to exhibit The excellent area specific activity also fully guarantees the utilization efficiency of metal atoms. Surprisingly, it is found that on the basis of the particle size being significantly larger than that of commercial Pt-based catalysts, it can also achieve a higher mass specific activity than commercial catalysts, which significantly improves the catalytic performance of noble metals. The utilization efficiency achieves an unexpected technical effect, and can further improve the anti-poisoning ability and electrocatalytic stability of the prepared metal alloy catalysis.

Description

technical field [0001] The invention belongs to the field of fuel cells. Specifically, the present invention relates to the application of a method for improving the anti-CO performance of formic acid electrooxidation. 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. For example, in the patent document CN110380068A, PtCuNi ternary alloys are prepared by adjusting the morphology to improve electrocatalytic performance and stability. However, it still faces the problems of high catalyst cost and low actual utilization efficiency of precious meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/92
CPCH01M4/9016H01M4/9075H01M4/921H01M4/925Y02E60/50
Inventor 吕一品李彬生高道伟杨绍寒陈国柱
Owner UNIV OF JINAN
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