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Nitrogen-doped carbon-loaded Mo/Pd alloy catalyst and application thereof

An alloy catalyst, nitrogen-doped carbon technology, applied in nanotechnology for materials and surface science, electrical components, battery electrodes, etc., can solve problems affecting catalyst activity and stability, and achieve high activity and simple process. Effect

Pending Publication Date: 2021-12-31
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the formation of alloys often requires a higher temperature, and the liquid phase reaction is only suitable for the synthesis of a small part of the alloy, and surfactants are required to stabilize the product to prevent agglomeration, and the final residual surfactant will seriously affect the activity and stability of the catalyst.

Method used

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  • Nitrogen-doped carbon-loaded Mo/Pd alloy catalyst and application thereof
  • Nitrogen-doped carbon-loaded Mo/Pd alloy catalyst and application thereof
  • Nitrogen-doped carbon-loaded Mo/Pd alloy catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 105 mL of propionic acid was placed in a round-bottomed flask, a magnet was added, the rotation speed was set to 500 rpm, and the temperature was raised to 145 °C. Weigh 190 mg of pyrrole solution with an electronic balance, dissolve it in 45 mL of propionic acid, and then add it dropwise to a round-bottomed flask for about 10 min, react for 3 h, and wash with ethanol and water after the reaction to obtain a solid black powder, namely For the nano-spherical polypyrrole.

Embodiment 2-4

[0039] The feeding time of the pyrrole solution in Example 1 was changed to 0, 5, and 15 min, respectively, and the product morphology was obtained as follows: figure 1 shown.

[0040] The morphology of polypyrrole prepared at different feeding times was studied, such as figure 1 As shown in (a), pyrrole is directly added to propionic acid under the condition of 0 min. The polypyrrole has a spherical structure as a whole, but a small part has a non-spherical irregular shape; when the feeding time is slowed down to 5 min, likefigure 1 As shown in (b), the product is all composed of spheres, the size is relatively uniform, distributed around 250nm, and shows excellent dispersibility; when the feeding time is slowed down to 10min, as shown in Fig. figure 1 As shown in (c), the product size distribution uniformity and dispersibility are still very good, and the output is more than 2 times that of the product obtained under the condition of 5min feeding time; when the feeding time...

Embodiment 5-7

[0042] The stirring speed in Example 1 was changed to 300, 400, and 600 rpm respectively, and the product morphology was obtained as follows: figure 2 shown.

[0043] The morphology of polypyrrole prepared at different stirring speeds was studied, such as figure 2 As shown in (a), under the condition of 300 rpm, the size of the prepared polypyrrole was not uniform, and other irregular shapes appeared, but most of them kept the spherical structure; when the stirring speed was increased to 400 rpm, as shown in Fig. figure 2 As shown in (b), the spherical structure became more and more uniform, and the dispersion was also improved; when the stirring speed was increased to 500 rpm, as shown in figure 2 As shown in (c), the irregular shape completely disappeared, and the products were all polypyrrole nanospheres with narrow size distribution and good dispersibility; when the stirring speed was increased to 600 rpm, as shown in Fig. figure 2 As shown in (d), the product exhib...

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Abstract

The invention belongs to the technical field of electrochemical catalyst materials, and particularly relates to a nitrogen-doped carbon-loaded Mo / Pd alloy catalyst and application. The nitrogen-doped carbon-loaded Mo / Pd alloy catalyst is obtained by dipping molybdate and chloropalladic acid into pores of nano spherical polypyrrole and calcining. The nitrogen-doped carbon-loaded Mo / Pd alloy catalyst provided by the invention shows very high activity, stability and methanol poisoning resistance to oxygen reduction reaction.

Description

technical field [0001] The invention belongs to the technical field of electrochemical catalyst materials, in particular to a nitrogen-doped carbon-supported Mo / Pd alloy catalyst and its application. Background technique [0002] The development of science and technology will inevitably increase the demand for energy, especially the consumption of non-renewable energy fossil fuels, which forces people to explore and produce materials that are beneficial to the ecological environment to replace non-renewable fuels. At present, fuel cells have attracted extensive attention due to their high energy conversion efficiency and low pollutant emissions. The cathode oxygen reduction (ORR) reaction is a key step. However, there are still problems to be solved in the process of oxygen reduction reaction, such as: the reaction kinetics is relatively slow, and the desired effect cannot be achieved; although Pt can promote the high efficiency of oxygen reduction reaction, its long-term cy...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M4/92B82Y30/00
CPCH01M4/8825H01M4/9041H01M4/9083H01M4/921H01M4/926B82Y30/00H01M2004/8689Y02E60/50
Inventor 陈伟唐文静杨圣双岑朝杰施妙艳
Owner WENZHOU UNIVERSITY
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