Mesoporous platinum-palladium-gold electrocatalyst and preparation method thereof

Abstract

The present invention provides a platinum-palladium-gold nanometer mesoporous electrocatalyst and a preparation method thereof. A potassium chloroplatinate, a sodium chloropalladate and a chloroauricacid solution with concentrations of 5-40 mM, a hydrochloric acid with a concentration of 1-10 mM, and an ascorbic acid solution with a concentration of 0.02-0.5 mM are prepared; the solution of the potassium chloroplatinate, the sodium chloropalladate and the chloroauric acid with the total volume of 4 mL are mixed, the hydrochloric acid with 10-200 [Mu]L is added, and F127 between 10-100mg is added for complete dissolution by ultrasound; and finally, the ascorbic acid solution with 1-5mL is added to uniformly mix with the solution and put the solution into an ultrasonic washing unit for heating to a temperature in a range of 20-60 DEG C, after reaction for 1-6 hours, the solution is washed by pure water, and products are collected by centrifugation and dried to obtain a platinum-palladium-gold nanometer mesoporous electrocatalyst. The reaction time is short, the electrocatalytic methanol oxidation reaction performance is excellent.

Description

(1) Technical field [0001] The invention relates to a mesoporous platinum-palladium-gold electrocatalyst and a preparation method thereof. The catalyst can be used for the research of electrochemically catalyzing methanol oxidation reaction. (2) Background technology [0002] As a kind of energy storage and conversion device, direct methanol fuel cell can convert the chemical energy of methanol fuel into electrical energy. It has the advantages of high conversion efficiency, energy saving and environmental protection, and has attracted extensive attention. Platinum is usually used as an electrocatalyst in the anode methanol oxidation process, and its high price limits the wide application of direct methanol fuel cells. Therefore, many current studies are devoted to reducing the amount of platinum in the catalyst and increasing its utilization rate under the premise of maintaining the stability of the catalyst. In this regard, combining platinum with other relatively inexpen...

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Problems solved by technology

Although there have been many reports on the synthesis of platinum-based mesoporous materials, these methods mainly focus on the synthesis of monometallic or bimetallic components, and there are relatively few reports on mesoporous multimetallic components, and most of these methods focus on the hard template method. , incipient wetness impregnation method, electrochemical deposition method, etc., the operation steps are relatively cumbersome (B-S.Choi, Y.W.Lee, S.W.Kang, J.W.Hong, J.Kim, I.Park and S.W.Han, MultimetallicAlloy Nanotubes with Nanoporous Framework.ACS Nano, 2012, 6(6), 5659–5667)

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