Aryne-grafted carbon-supported electrocatalyst and process of preparing the same

Patent metadata

Field	Value
Publication number	US-11056693-B2
Application number	US-201815879237-A
Country	US
Kind code	B2
Filing date	Jan 24, 2018
Priority date	Sep 6, 2017
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

An aryne-grafted carbon-supported catalyst and a method of preparing the same, and particularly to a carbon-supported catalyst having an organic anchor formed on the surface of a carbon support through aryne cycloaddition in order to improve the durability of a fuel cell catalyst, and a method of preparing the same. It is possible to form a covalent bonding selectively to a carbon support of a fuel cell catalyst in a solution by using 2-(trimethylsilyl)phenyl triflate or the like. In addition, the formed anchor prevents adhesion of metal catalyst particles of a fuel cell, and thus improves the durability of a fuel cell catalyst.

First claim

What is claimed is:

1. A method of preparing an aryne-grafted carbon-supported catalyst, comprising the steps of:
(A) dispersing a carbon-supported platinum (Pt/C) catalyst to a solution containing a compound represented by the following Chemical Formula 2 dissolved in a solvent to obtain a dispersion:

(B) introducing at least one reaction catalyst to the dispersion to carry out aryne cycloaddition; and
(C) separating and recovering a compound represented by Chemical Formula 1 modified the carbon-supported platinum (Pt/C) catalyst after the completion of a reaction:

wherein R 1 and R 2 are the same or different, and each is independently selected from the group consisting of H, F and C1-C6 alkyl groups;
—X is selected from —Si(CH 3 ) 3 and —F;
—Y is selected from —O—SO 2 —CF 3 and —H; and
bonding to the carbon support occurs at two sites marked by wavy lines,
wherein the reaction catalyst is at least one selected from CsF, Mg and KF, and the solvent is at least one selected from CH 3 CN and THF.

2. The method of preparing an aryne-grafted carbon-supported catalyst according to claim 1 , wherein the carbon-supported catalyst and the compound represented by Chemical Formula 2 are introduced at a weight ratio of 1:0.1-1.

Assignees

• Korea Inst Sci & Tech

Inventors

• Jang Jong Hyun
• Park Hee-Young
• Kim Hyoung-Juhn
• Henkensmeier Dirk
• Yoo Sung Jong
• Kim Jin Young
• Lee So Young
• Park Hyun Seo

Classifications

• H01M8/1004

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title

• H01M4/926

  on carbon or graphite · CPC title

• H01M4/9083

  on carbon or graphite · CPC title

• B01J31/12 Primary

  containing organo-metallic compounds or metal hydrides · CPC title

• B01J37/0201

  Impregnation · CPC title