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Mesoporous platinum palladium cobalt alloy nanosphere for catalyzing oxidation reaction of formic acid and preparation method of mesoporous platinum palladium cobalt alloy nanosphere

A technology of formic acid oxidation and nanospheres, which is applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve problems such as cumbersome synthesis steps, and achieve simple synthesis methods, mild reaction conditions and high yields. Effect

Inactive Publication Date: 2019-02-26
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation methods used in many literatures require high temperature or hard template method, which makes the synthesis steps more cumbersome.

Method used

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  • Mesoporous platinum palladium cobalt alloy nanosphere for catalyzing oxidation reaction of formic acid and preparation method of mesoporous platinum palladium cobalt alloy nanosphere
  • Mesoporous platinum palladium cobalt alloy nanosphere for catalyzing oxidation reaction of formic acid and preparation method of mesoporous platinum palladium cobalt alloy nanosphere
  • Mesoporous platinum palladium cobalt alloy nanosphere for catalyzing oxidation reaction of formic acid and preparation method of mesoporous platinum palladium cobalt alloy nanosphere

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Experimental program
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Effect test

Embodiment 1

[0037] A method for preparing a mesoporous platinum-palladium-cobalt alloy nanosphere that catalyzes the oxidation reaction of formic acid, said method comprising the steps of:

[0038] 1) chloroplatinic acid, sodium chloropalladate and cobalt chloride solution with a concentration of 20mM, hydrochloric acid solution with a concentration of 6M and ascorbic acid solution with a concentration of 0.1M;

[0039] 2) Mix 2.4mL of chloroplatinic acid, 0.8mL of sodium chloropalladate and 0.8mL of cobalt chloride solution, then add 0.05mL of hydrochloric acid solution, then add 0.04g of F127; finally add 4mL of ascorbic acid solution ,well mixed;

[0040] 3) After the solution is fully mixed, place it in a water bath and heat it to 40° C., react for 4 hours, wash, centrifuge, and dry to obtain mesoporous platinum-palladium-cobalt alloy nanospheres.

[0041] The SEM figure of the obtained platinum palladium cobalt mesoporous nanospheres is shown in figure 1 . The TEM picture of the o...

Embodiment 2

[0044] A kind of preparation method of the mesoporous platinum-palladium alloy nanosphere of catalytic formic acid oxidation reaction, described method comprises the steps:

[0045] 1) chloroplatinic acid and sodium chloropalladate solutions with a concentration of 20mM, hydrochloric acid solution with a concentration of 6M and ascorbic acid solution with a concentration of 0.1M are prepared respectively;

[0046] 2) Mix 3mL of chloroplatinic acid and 1mL of sodium chloropalladate solution, then add 0.05mL of hydrochloric acid solution prepared in advance, then add 0.04g of F127, and ultrasonically dissolve it completely; finally add 4mL of ascorbic acid solution;

[0047] 3) After the solution is uniformly mixed, place it in an ultrasonic cleaner and heat it to 40° C., react for 4 hours, wash with ultrapure water, collect the product by centrifugation, and dry to obtain mesoporous platinum-palladium-cobalt alloy nanospheres.

[0048] It can be seen from the SEM image that wh...

Embodiment 3

[0050] A method for preparing a mesoporous platinum-palladium-cobalt alloy nanosphere that catalyzes the oxidation reaction of formic acid, said method comprising the steps of:

[0051] 1) chloroplatinic acid, sodium chloropalladate and cobalt chloride solution with a concentration of 10mM, hydrochloric acid solution with a concentration of 1M and ascorbic acid solution with a concentration of 0.02M;

[0052] 2) Mix 2.4mL of chloroplatinic acid, 0.8mL of sodium chloropalladate and 0.8mL of cobalt chloride solution, then add 0.01mL of hydrochloric acid solution, then add 0.01g of F127; finally add 1mL of ascorbic acid solution ,well mixed;

[0053] 3) After the solution is fully mixed, place it in a water bath and heat it to 25° C., react for 1 hour, wash, centrifuge, and dry to obtain mesoporous platinum-palladium-cobalt alloy nanospheres.

[0054] During the reaction, the concentration of chloroplatinic acid, sodium chloropalladate and cobalt chloride solution is very low, s...

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Abstract

The invention discloses a mesoporous platinum palladium cobalt electrocatalyst for catalyzing an oxidation reaction of formic acid and a preparation method of the mesoporous platinum palladium cobaltelectrocatalyst. The preparation method comprises the following steps: respectively preparing a chloroplatinic acid solution, a sodium chloropalladate solution and a cobalt chloride solution with theconcentration of 10 to 100mM, a hydrochloric acid solution with the concentration of 1 to 10M and an ascorbic acid solution with the concentration of 0.02 to 0.4M; respectively taking the chloroplatinic acid solution, the sodium chloropalladate solution and the cobalt chloride solution with the total volume of 4mL for mixing, adding 0.01 to 0.2mL of prepared hydrochloric acid solution and then adding 0.01 to 0.2g of F127; finally, adding 1 to 8mL of the ascorbic acid solution and uniformly mixing; after the solution is fully mixed, putting the solution into a water bath kettle, heating to 25 to 70 DEG C, reacting for 1 to 10 hours, washing, centrifuging and drying to obtain a platinum palladium cobalt alloy catalyst. The preparation method disclosed by the invention has the advantages of simple operation flow and relatively short reaction time; a material prepared at normal temperature and pressure has excellent electrocatalytic formic acid oxidation property.

Description

(1) Technical field [0001] The invention relates to a mesoporous platinum-palladium-cobalt alloy nanosphere for catalyzing the oxidation reaction of formic acid and a preparation method thereof. The catalyst can be used for the research of electrochemically catalyzing the oxidation reaction of formic acid. (2) Background technology [0002] Direct formic acid fuel cell has the advantages of low reaction energy barrier, high energy density and low toxicity, and is one of the most potential clean energy sources at present. The development of new anode electrocatalysts for formic acid oxidation reaction is an effective way to promote the development of formic acid fuel cells. Currently, platinum-based catalysts are the most commonly used electrocatalysts for the oxidation of formic acid. However, due to the low reserves and high price of precious metal platinum, its large-scale application is limited (Y.Kang, L.Qi, M.Li, R.E.Diaz, D.Su, R.R.Adzic, E.Stach, J.Li and C.B. Murra...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/92B82Y30/00
CPCB82Y30/00H01M4/88H01M4/921Y02E60/50
Inventor 王亮李春洁王自强薛海荣许友王鸿静
Owner ZHEJIANG UNIV OF TECH
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