Ammonia synthesis device and ammonia synthesis method using the same

Patent metadata

Field	Value
Publication number	US-2025333855-A1
Application number	US-202519188343-A
Country	US
Kind code	A1
Filing date	Apr 24, 2025
Priority date	Apr 26, 2024
Publication date	Oct 30, 2025
Grant date	—

Abstract

Provided herein is an ammonia synthesis device including an electrode unit including a first electrode and a second electrode that have opposite polarities, and an electrolyte in which at least a portion of the electrode unit is immersed, wherein the electrolyte includes an organic solvent, a lithium salt, and a medium that provides protons, and at least a portion of the first electrode includes silver through galvanic replacement, or the electrolyte further includes a silver salt

First claim

What is claimed is:

1 . An ammonia synthesis device comprising:
an electrode unit comprising a first electrode and a second electrode that have opposite polarities; and an electrolyte in which at least a portion of the electrode unit is immersed, wherein the electrolyte comprises an organic solvent, a lithium salt, and a medium that provides protons, and at least a portion of the first electrode comprises silver through galvanic replacement, or the electrolyte further comprises a silver salt.

2 . The ammonia synthesis device of claim 1 , wherein only a portion of the first electrode which is immersed in the electrolyte is galvanically replaced with silver.

3 . The ammonia synthesis device of claim 1 , wherein a concentration of the silver salt added to the electrolyte is in a range of about 10 μM to about 8,000 μM.

4 . The ammonia synthesis device of claim 1 , wherein the first electrode comprises at least any one of copper, nickel, molybdenum, titanium, or stainless steel.

5 . The ammonia synthesis device of claim 1 , wherein the electrode unit further comprises a reference electrode for measuring the reduction potential of lithium.

6 . An ammonia synthesis method comprising:
supplying nitrogen into an electrolyte; applying a voltage to an electrode unit that is at least partially immersed in the electrolyte; and reducing the nitrogen with the applied voltage to produce ammonia, wherein at least a portion of a first electrode of the electrode unit comprises silver through galvanic replacement, or the electrolyte further comprises a silver salt.

7 . The ammonia synthesis method of claim 6 , wherein only a portion of the first electrode which is immersed in the electrolyte is galvanically replaced with the silver.

8 . The ammonia synthesis method of claim 6 , wherein a concentration of the silver salt added to the electrolyte is in a range of about 10 μM to about 8,000 μM.

9 . The ammonia synthesis method of claim 6 , wherein the first electrode comprises at least any one of copper, nickel, molybdenum, titanium, or stainless steel.

10 . The ammonia synthesis method of claim 6 , wherein, in the application of the voltage, a first layer comprising silver and lithium is formed, and a second layer comprising LiF is formed on the first layer.

Assignees

• Seoul Nat Univ R&Db Foundation

Inventors

• Hwang Yun Jeong
• Jeon Yeong Bae
• Shin Dong Woo

Classifications

• C01C1/04

  Preparation of ammonia by synthesis (preparation or purification of gas mixtures for ammonia synthesis C01B3/025) · CPC title

• C25B11/042

  Electrodes formed of a single material · CPC title

• C25B1/50

  Processes · CPC title

• C25B1/27 Primary

  Ammonia · CPC title

• C25B1/00

  Electrolytic production of inorganic compounds or non-metals · CPC title