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PEM electrolytic water hydrogen evolution catalyst with low precious metal content as well as preparation method and application of PEM electrolytic water hydrogen evolution catalyst

A catalyst and precious metal technology, applied in the application field of PEM electrolyzed water, can solve the problems of high cost and scarcity of precious metal materials hindering large-scale practical application, and achieve the effects of optimizing the distribution of internal electronic states, reducing costs, and strong operability

Pending Publication Date: 2022-06-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high cost and scarcity of noble metal materials hinder their large-scale practical application

Method used

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  • PEM electrolytic water hydrogen evolution catalyst with low precious metal content as well as preparation method and application of PEM electrolytic water hydrogen evolution catalyst
  • PEM electrolytic water hydrogen evolution catalyst with low precious metal content as well as preparation method and application of PEM electrolytic water hydrogen evolution catalyst
  • PEM electrolytic water hydrogen evolution catalyst with low precious metal content as well as preparation method and application of PEM electrolytic water hydrogen evolution catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 1g of conductive carbon and 2g of melamine mixed ball mill, the ball milling time is 1h, and the ball milling speed is 300rpm. The resulting mixture was placed in an ark and calcined at 700°C for 1 h in a tube furnace under an argon atmosphere. The calcined conductive carbon was mixed with 50 mg of platinum acetylacetonate for ball milling, the ball milling time was 1 h, and the ball milling rate was 300 rpm. The obtained ball milling product was placed in an ark, and calcined at 700 °C for 1 h in a tube furnace under an argon atmosphere to obtain nitrogen-doped Conductive carbon-supported platinum nanoparticle catalyst samples.

[0038] figure 2 In order to obtain the TEM image of nitrogen-doped conductive carbon-supported platinum nanoparticle catalyst, the figure 2 It can be seen that the distribution of Pt particles is relatively uniform, and the size is relatively consistent, about 5 nm.

[0039] The electrochemical activity and stability data of the nit...

Embodiment 2

[0041] 1g of conductive carbon and 2g of sodium hypophosphite were weighed and placed in different arks, the ark was placed in a tube furnace, and the sodium hypophosphite was placed upstream of the conductive carbon, and calcined at 350°C for 2h in an argon atmosphere. The calcined modified conductive carbon was mixed with 50 mg of platinum acetylacetonate for ball milling, the ball milling time was 1 h, and the ball milling speed was 300 rpm. The obtained ball-milled product was placed in an ark, and calcined at 700 °C for 1 h in a tube furnace under an argon atmosphere to obtain a phosphorus-doped conductive carbon-supported platinum nanoparticle catalyst sample.

[0042] The electrochemical activity and stability data of the phosphorus-doped conductive carbon-supported platinum nanoparticle catalyst material obtained in this example are shown in Table 1 and Table 2, respectively.

Embodiment 3

[0044] Weigh 1g of conductive carbon and 2g of melamine phosphate mixed ball milling, the ball milling time is 1h, and the ball milling speed is 300rpm. The resulting mixture was placed in an ark and calcined at 700°C for 1 h in a tube furnace under an argon atmosphere. The calcined modified conductive carbon was mixed with 50 mg of platinum acetylacetonate for ball milling, the ball milling time was 1 h, and the ball milling speed was 300 rpm. The obtained ball-milled product was placed in an ark and calcined at 600 °C for 1 h in a tube furnace under an argon atmosphere to obtain a nitrogen and phosphorus double-doped conductive carbon-supported platinum nanoparticle catalyst sample.

[0045] image 3 In order to obtain the TEM image of nitrogen and phosphorus double-doped conductive carbon-supported platinum nanoparticle catalyst, the image 3 It can be seen that the distribution of Pt nanoparticles is relatively uniform, and the size distribution is uniform, about 2nm.

...

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Abstract

The invention discloses a catalyst which comprises a modified conductive carbon carrier and noble metal nanoparticles uniformly loaded on the surface of the modified conductive carbon carrier. The invention further discloses a preparation method of the catalyst and application of the catalyst to a PEM water electrolysis hydrogen evolution reaction electrode. The noble metal content of the catalyst is greatly reduced compared with that of a commercial catalyst, and the catalyst has excellent catalytic activity and long-term stability.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a modified conductive carbon anchored by nitrogen or / and phosphorus to support a noble metal nanoparticle catalyst, a preparation method thereof and its application in PEM electrolyzed water. Background technique [0002] As a clean secondary energy source, hydrogen is lightweight, easy to store, energy-dense, and has no operating temperature restrictions, and does not emit pollutants or greenhouse gases directly. Therefore, vigorously developing renewable energy to produce hydrogen by electrolysis of water can help accelerate the process of decarbonization and the transformation of energy structure. [0003] The highly dynamic Proton Exchange Membrane Electrolyzer (PEMEL) technology is ideal for forming a dynamic, efficient and clean hydrogen production process based on fluctuating energy generated by renewable energy sources such as wind and solar energy, converting electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/054C25B11/065C25B11/081C25B1/04B22F9/04B22F1/054B22F1/142B22F9/24B82Y30/00
CPCC25B11/054C25B11/065C25B11/081C25B1/04B22F9/24B22F9/04B82Y30/00B22F2009/043Y02E60/36
Inventor 邹吉军黄振峰潘伦张香文何泽兴
Owner TIANJIN UNIV
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