Synthesis method and application of Cu octahedron PtCu-rich nano-catalyst for fuel cell

Abstract

The invention discloses a synthesis method of a Cu octahedron PtCu-rich nano-catalyst. The synthesis method is characterized by comprising the following steps of (1) adding metal platinum salt and copper salt into an organic solvent DMF (Dimethyl Formamide), and stirring for 5 to 8 minutes at room temperature, wherein the amount of a metal salt precursor is 0.01 to 0.1mol; the molar ratio of a platinum salt precursor to a copper salt precursor is (5:1) to (1:5); the amount of the organic solvent DMF is required for completely dissolving the platinum salt and the copper salt; (2) adding glucoseand CTAB (Cetyltrimehtyl Ammonium Bromide) into a mixed solution obtained in the step (1), and stirring for 3 to 10 minutes at room temperature; (3) adding formaldehyde into a mixed solution obtainedin the step (2), and stirring for 1 to 10 minutes at room temperature, wherein the volume ratio of the formaldehyde to the DMF is (1:1) to (1:8); (4) transferring a mixed solution obtained in the step (3) into a high pressure reactor, reacting for 6 to 24 hours, and controlling the temperature to be 120 to 200 DEG C; (5) cooling a product obtained in the step (4), washing, and centrifugally separating to obtain a Cu octahedron PtCu-rich nanocrystal.

Description

technical field [0001] The invention relates to a synthesis method of a Cu-rich octahedral PtCu nanometer catalyst used in fuel cells and its application in fuel cells. Background technique [0002] Metal Pt plays an irreplaceable role in alcohol oxidation, oxygen reduction, biomass fuel and hydrogen fuel cell. However, due to the scarcity and high price of Pt, the commercial cost of fuel cells is high, so the alloying of Pt and cheap metals is an effective way to reduce its cost. In addition, the shape, size and composition of alloy nanocatalysts play a decisive role in the performance of the catalyst, so it is very important to prepare Pt-based alloy catalysts with controllable shape, size and composition. So far, there are no cases of synthesis methods and shape control techniques for the synthesis of Cu-rich octahedral PtCu nanocatalysts in the liquid phase. Moreover, the addition of Cu to form an alloy can not only enhance the catalytic performance of the catalyst, bu...

AI Technical Summary

Problems solved by technology

So far, there are no cases of synthesis methods and shape control techniques for the synthesis of Cu-rich octahedral PtCu nanocatalysts in the liquid phase.

Images