Pt-N-C Based Electrochemical Catalyst for Chlorine Evolution Reaction and Production Method Thereof

Patent metadata

Field	Value
Publication number	US-2021060535-A1
Application number	US-202016791281-A
Country	US
Kind code	A1
Filing date	Feb 14, 2020
Priority date	Sep 2, 2019
Publication date	Mar 4, 2021
Grant date	—

Abstract

The present invention relates to a Pt—N—C based electrochemical catalyst for chlorine evolution reaction and a production method thereof, and an aspect of the present invention provides a Pt—N—C based electrochemical catalyst including: a carbon support; and an organic compound including Pt and N distributed on the carbon support.

First claim

What is claimed is:

1 . A Pt—N—C based electrochemical catalyst comprising:
a carbon support; and
an organic compound including Pt and N distributed on the carbon support.

2 . The Pt—N—C based electrochemical catalyst of claim 1 , wherein the carbon support includes at least one selected from the group consisting of carbon nanotube, carbon nanofiber, graphene, reduced graphene oxide (rGO), and carbon black.

3 . The Pt—N—C based electrochemical catalyst of claim 1 , wherein the organic compound includes a macrocyclic compound, and the macrocyclic compound includes at least one selected from the group consisting of porphyrin, phthalocyanine, corrole, cyclam, and tetraazaannulene.

4 . The Pt—N—C based electrochemical catalyst of claim 1 , wherein the organic compound includes at least one selected from the group consisting of phenanthroline, cyanamide, ethylenediamine, pyridine, pyrrole, aniline, pyrazine, purine, imidazole, triazine, amino acid, nucleobase, and polyaniline.

5 . The Pt—N—C based electrochemical catalyst of claim 1 , wherein the organic compound includes a Pt—N X site (here X is 4 or 6).

6 . The Pt—N—C based electrochemical catalyst of claim 1 , wherein the Pt is dispersed in a monoatomic unit.

7 . The Pt—N—C based electrochemical catalyst of claim 1 , wherein the Pt has a particle diameter of 0.5 nm or less.

8 . The Pt—N—C based electrochemical catalyst of claim 1 , wherein the Pt is included in an amount of 0.1 wt % to 3 wt % in the Pt—N—C based electrochemical catalyst.

9 . The Pt—N—C based electrochemical catalyst of claim 1 , wherein the Pt—N—C based electrochemical catalyst has a selectivity of chlorine evolution reaction to oxygen evolution reaction of 95% or more at a chlorine evolution electrode of a chlor-alkali water electrolysis device.

10 . A production method of a Pt—N—C based electrochemical catalyst, the production method comprising:
mixing a carbon support with a Pt—N precursor including Pt and N to obtain a carbon support mixture; and
heat-treating the carbon support mixture.

11 . The production method of claim 10 , wherein the Pt—N precursor includes a macrocyclic compound including a Pt—N coordination, and the macrocyclic compound including the Pt—N coordination includes at least one selected from the group consisting of platinum porphyrin and its derivatives, platinum phthalocyanine and its derivatives, platinum corrole and its derivatives, platinum cyclam and its derivatives, and platinum tetraazaannulene and its derivatives.

12 . The production method of claim 10 , wherein the Pt—N precursor includes Pt 2+ Tetraphenylporphyrin (Pt II TPP).

13 . The production method of claim 10 , wherein the Pt—N precursor includes a platinum-organic compound including a Pt—N coordination, and the platinum-organic compound includes at least one selected from the group consisting of a platinum-phenanthroline complex and its derivatives, a platinum-cyanamide complex and its derivatives, a platinum-ethylenediamine complex and its derivatives, a platinum-pyridine complex and its derivatives, a platinum-pyrrole complex and its derivatives, a platinum-aniline complex and its derivatives, a platinum-pyrazine complex and its derivatives, a platinum-purine complex and its derivatives, a platinum-imidazole complex and its derivatives, a platinum-triazine complex and its derivatives, a platinum-amino acid complex and its derivatives, a platinum-nucleobase complex and its derivatives, and a platinum-polyaniline complex and its derivatives.

14 . The production method of claim 10 , wherein the carbon support mixture includes less than 5 wt % of the Pt.

15 . The production method of claim 10 , wherein the heat-treating of the carbon support mixture is performed at a temperature of 300° C. to 1,000° C.

Assignees

• Ulsan Nat Inst Science & Tech Unist

Inventors

• Joo Sang Hoon
• Lim Tae Jung

Classifications

• B01J31/18

  containing nitrogen, phosphorus, arsenic or antimony {as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms (double metal cyanides B01J27/26; N-heterocyclic carbenes B01J31/2265)} · CPC title

• B01J35/33

  Electric or magnetic properties · CPC title

• B01J35/45

  Nanoparticles · CPC title

• B01J21/185

  Carbon nanotubes (carbon nanotubes per se C01B32/15) · CPC title

• B01J31/22

  Organic complexes · CPC title