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Iron-based non-noble metal catalyst for electrocatalytic synthetic ammonia and preparation method thereof

A non-precious metal and catalyst technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of low Faradaic efficiency and low catalytic efficiency, and achieve the effects of improving the utilization rate of iron atoms, reducing costs, and convenient preparation methods.

Inactive Publication Date: 2018-11-06
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the faradaic efficiency of the existing electrocatalytic ammonia synthesis process is lower than 20%, and the catalytic efficiency is low

Method used

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  • Iron-based non-noble metal catalyst for electrocatalytic synthetic ammonia and preparation method thereof
  • Iron-based non-noble metal catalyst for electrocatalytic synthetic ammonia and preparation method thereof
  • Iron-based non-noble metal catalyst for electrocatalytic synthetic ammonia and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh FeSO 4 ·7H 2 Add 5.56g of O, 0.1g of ascorbic acid, 0.6g of o-sulfonyl benzimide, and 0.3g of sodium lauryl sulfate into a beaker, add an appropriate amount of deionized water to dissolve, stir until it is completely dissolved, transfer it to a 200mL volumetric flask, and continue Add deionized water to the scale line; before electrodeposition, carry out surface treatment on the graphite rod working electrode to increase surface smoothness or remove surface impurity ions; use platinum electrode as counter electrode, saturated calomel electrode as reference electrode, and graphite rod as working electrode Electrode, take 50mL of FeSO prepared above 4 The solution is placed in a conventional electrolytic cell (such as figure 2 ), adjust the pH to 3.0, use the Gamry electrochemical workstation, use the three-electrode system cyclic voltammetry for electrodeposition, and set the scan rate to 0.02V s -1 , the cycle potential is between -1.6V and -0.8V, and the meta...

Embodiment 2

[0044] Weigh FeSO 4 ·7H 2 Add 8.58g of O, 0.2g of ascorbic acid, 0.8g of o-sulfonyl benzimide, and 0.5g of sodium lauryl sulfate into a beaker, add an appropriate amount of deionized water to dissolve, stir until it is completely dissolved, transfer it to a 200mL volumetric flask, and continue Add deionized water to the scale line; before electrodeposition, carry out surface treatment on the graphite rod working electrode to increase surface smoothness or remove surface impurity ions; use platinum electrode as counter electrode, saturated calomel electrode as reference electrode, and graphite rod as working electrode Electrode, take 50mL of FeSO prepared above 4 The solution was placed in a conventional electrolytic cell, and the pH was adjusted to 3.5. With the help of Gamry electrochemical workstation, three-electrode system cyclic voltammetry was used for electrodeposition, and the scanning rate was set to 0.02V s. -1 , the cycle potential is between -1.6V and -0.8V, and ...

Embodiment 3

[0047] Weigh FeSO 4 ·7H 2 Add 5.56g of O, 0.1g of ascorbic acid, 0.6g of o-sulfonyl benzimide, and 0.3g of sodium lauryl sulfate into a beaker, add an appropriate amount of deionized water to dissolve, stir until it is completely dissolved, transfer it to a 200mL volumetric flask, and continue Add deionized water to the scale line; before electrodeposition, carry out surface treatment on the metal copper sheet working electrode to increase the surface smoothness or remove surface impurity ions; use the platinum electrode as the counter electrode, the saturated calomel electrode as the reference electrode, and the copper sheet as Working electrode, take 50mL of FeSO prepared above 4 The solution was placed in a conventional electrolytic cell, and the pH was adjusted to 3.5. With the help of Gamry electrochemical workstation, three-electrode system cyclic voltammetry was used for electrodeposition, and the scanning rate was set to 0.02V s. -1 , the cycle potential is between -...

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Abstract

The invention discloses an iron-based non-noble metal catalyst for electrocatalytic synthetic ammonia and a preparation method thereof. The preparation method is characterized in that bivalent iron ions in the bivalent iron salt solution are reduced and deposited on the surface of a conductive carrier by adopting an electrochemical deposition method, and the bivalent iron salt solution contains bivalent iron salt, a reducing agent, o-sulfonyl imide and sodium dodecyl sulfate. According to the preparation method, the catalyst is carried out electro-catalysis to synthesize ammonia, so that the faraday efficiency of the electrocatalysis synthetic ammonia process can be obviously improved.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation in the chemical engineering industry, and relates to an iron-based non-noble metal catalyst for electrocatalytically synthesizing ammonia and a preparation method. Background technique [0002] The synthetic ammonia industry is the pillar industry of chemical production. After more than a hundred years of development, the catalytic ammonia synthesis technology has made great progress. In the Haber-Bosch nitrogen fixation process that uses thermal energy of fossil fuels as the sole driving force, the raw materials and fuels for catalytic ammonia production are energy sources, and some by-products (such as carbon dioxide) of the production process are identified as the source of air pollution. The energy issue of global concern is placed in front of the synthetic ammonia industry, and energy saving and emission reduction are the primary topics of the traditional ammonia synthesis proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/00C25D3/20
CPCC25B1/00C25D3/20C25B11/073
Inventor 张其坤刘宝良李涵王佳敏
Owner SHANDONG NORMAL UNIV
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