Palladium-ruthenium nano-thorn assembly catalyst and preparation method thereof

A nanothorn and assembly technology, which is applied in the field of palladium ruthenium nanothorn assembly catalyst and its preparation, can solve the problems of complexity, difficulty in large-scale preparation, time-consuming, etc., and achieve simple preparation method, high yield and high application foreground effect

Inactive Publication Date: 2019-03-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These multi-step synthetic methods are difficult to scale up due to their complex and time-consuming processes

Method used

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  • Palladium-ruthenium nano-thorn assembly catalyst and preparation method thereof
  • Palladium-ruthenium nano-thorn assembly catalyst and preparation method thereof
  • Palladium-ruthenium nano-thorn assembly catalyst and preparation method thereof

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Embodiment 1

[0038] A preparation method of a palladium ruthenium nanothorn assembly catalyst, said method comprising the steps of:

[0039] 1) Prepare respectively sodium chloropalladate and ruthenium chloride with a concentration of 20mM, a hydrochloric acid solution with a concentration of 6M and an ascorbic acid solution with a concentration of 0.1M;

[0040]2) Mix 0.4mL sodium chloropalladate and 2.6mL ruthenium chloride solution, then add 0.1 mL hydrochloric acid solution, then add 80mg potassium bromide and 50mg F127, and mix evenly by ultrasonic; finally add 2mL ascorbic acid solution, and mix by ultrasonic 10 minutes;

[0041] 3) After the solution is fully mixed, place it in an oil bath and heat it to 90° C., react for 1 hour, wash, centrifuge, and dry to obtain the palladium ruthenium nanothorn assembly catalyst.

[0042] The SEM figure of the obtained palladium ruthenium nanothorn assembly catalyst is shown in figure 1 . The TEM figure of the obtained palladium ruthenium nan...

Embodiment 2

[0045] A preparation method of a palladium ruthenium nanothorn assembly catalyst, said method comprising the steps of:

[0046] 1) Prepare respectively sodium chloropalladate and ruthenium chloride solutions with a concentration of 20mM, a hydrochloric acid solution with a concentration of 6M and an ascorbic acid solution with a concentration of 0.1M;

[0047] 2) Mix 1.5mL sodium chloropalladate and 1.5mL ruthenium chloride solution respectively, then add 0.1 mL hydrochloric acid solution, then add 80mg potassium bromide and 50mg F127, and mix well by ultrasonic. Finally, 2 mL of ascorbic acid solution was added, and ultrasonically mixed for 10 minutes;

[0048] 3) After the solution is fully mixed, place it in an oil bath and heat it to 90° C., react for 1 hour, wash, centrifuge, and dry to obtain the palladium ruthenium nanothorn assembly catalyst.

[0049] Obtain the SEM image of palladium ruthenium flower-shaped nanoparticles see Figure 7 .

[0050] It can be seen from...

Embodiment 3

[0052] A preparation method of a palladium ruthenium nanothorn assembly catalyst, said method comprising the steps of:

[0053] 1) Prepare respectively sodium chloropalladate and ruthenium chloride with a concentration of 20mM, a hydrochloric acid solution with a concentration of 6M and an ascorbic acid solution with a concentration of 0.1M;

[0054] 2) Mix 0.2 mL of sodium chloropalladate and 2.8 mL of ruthenium chloride solution, then add 0.2 mL of hydrochloric acid solution, then add 80 mg of potassium bromide and 50 mg of F127, and mix well by ultrasonic. Finally, 2 mL of ascorbic acid solution was added, and ultrasonically mixed for 10 minutes;

[0055] 3) After the solution is fully mixed, place it in an oil bath and heat it to 90° C., react for 1 hour, wash, centrifuge, and dry to obtain the palladium ruthenium nanothorn assembly catalyst.

[0056] Obtain the SEM image of palladium ruthenium nanoparticle see Figure 8 .

[0057] It can be seen from the SEM image that...

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Abstract

The invention discloses a palladium-ruthenium nano-thorn assembly catalyst and a preparation method thereof. Sodium tetrachloropalladate and ruthenium chloride solution of which the concentration is 1-30mM, hydrochloric acid solution of which the concentration is 1-10M and ascorbic acid solution of which the concentration is 0.01-0.5M are independently prepared; the sodium tetrachloropalladate andruthenium chloride solution of which the total volume is 3.0mL is independently taken for mixing, then, 0.1-0.5mL of prepared hydrochloric acid solution is added, and 0.1-0.5g of potassium bromide and F127 can be added to be evenly mixed; finally, 1-10mL of ascorbic acid solution is added; and after solution is fully mixed, the mixture is heated in an oil bath pan to 70-130DEG C to react for 0.1-3h, and washing, centrifugation and drying are carried out to obtain the palladium-ruthenium nano-thorn assembly catalyst. The preparation technology is simple, reaction time is short, and the prepared material has an excellent electrochemistry formic acid oxidation property at a normal temperature under normal pressure.

Description

(1) Technical field [0001] The invention relates to a palladium ruthenium nano-thorn assembly catalyst and a preparation method thereof, and the catalyst can be used for the research of electrocatalytic formic acid oxidation reaction. (2) Background technology [0002] Direct formic acid fuel cells are considered as a promising energy source for room temperature power generation and portable electronic devices. The catalytic performance of formic acid oxidation largely determines the performance of direct formic acid fuel cells, so catalysts applied to formic acid oxidation have received extensive attention and research. Studies have shown that palladium catalysts due to the direct reaction pathway (HCOOH→CO 2 +2H + +2e - ) has a high catalytic activity for the oxidation of formic acid under low overpotential conditions. In addition, the palladium catalyst has good resistance to CO poisoning, which is beneficial to improve the durability of the formic acid oxidation reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/92H01M8/1011
CPCH01M4/8825H01M4/9058H01M4/921H01M8/1011Y02E60/50
Inventor 王亮李英豪王自强薛海荣许友王鸿静
Owner ZHEJIANG UNIV OF TECH
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