an oxygen reduction catalyst

Abstract

The invention discloses an oxygen reduction catalyst, which is prepared by the following method: accurately weighing an appropriate amount of copper sulfate pentahydrate, dissolving it in distilled water, placing it at the bottom of a test tube, and then using a methanol-water mixed solution with a volume ratio of 1:1 as a buffer layer, dropwise into the test tube with a syringe, then mix 2-carbonylpropionic acid-4-nitrobenzoylhydrazone and 1-methylimidazole, dissolve in methanol, dropwise into the test tube, and place it on the upper layer of the solution, Finally, the mouth of the test tube was sealed with plastic wrap, and after standing for two weeks, dark green needle-like crystals were obtained at the interface of the solution on the wall of the test tube, which were complex crystals. tube, placed in ethanol, and ultrasonically dispersed for 1-2 h to obtain catalyst ink. The preparation of the catalyst of the invention is simple, the raw materials are easily obtained, and the cost is far lower than that of Pt / C. At the optimal ratio, a one-step 4-electron reduction of oxygen molecules on the electrode is achieved.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an oxygen reduction catalyst. Background technique [0002] Energy and environmental issues have become important issues restricting economic development, and countries around the world have invested heavily in the development and research of clean energy. As a new type of energy, fuel cells do not produce pollutants during use, so the development and research of fuel cells has attracted more and more attention. As a kind of fuel cell, direct methanol fuel cell (DMFC) has attracted great attention due to its advantages of convenience and high specific energy. At present, the DMFC cathode catalyst is mainly Pt / C. Platinum is not only expensive, but also has limited resources. At the same time, methanol penetrates into the cathode and discharges on the Pt / C catalyst, which reduces the catalytic activity, and the carbon monoxide generated by the discharge causes the catalyst to be ...

AI Technical Summary

Problems solved by technology

At present, the DMFC cathode catalyst is mainly Pt / C. Platinum is not only expensive, but also has limited resources. At the same time, methanol permeates into the cathode and discharges on the Pt / C catalyst, which reduces the catalytic activity, and the carbon monoxide generated by the discharge causes catalyst poisoning.

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