IP Library › Granted Patent US 12,308,445
Granted Patent B2
US 12,308,445 · App. 17/757,539 · Granted May 20, 2025

Methods of preparing catalyst materials

Inventors: Arman Bonakdarpour (Vancouver, CA); Lius Daniel (Vancouver, CA); Baizeng Fang (Vancouver, CA); Jonathan Sharman (Reading, GB); David Wilkinson (Vancouver, CA)
Assignee: Johnson Matthey Hydrogen Technologies Limited
H01M4/926H01M4/8807H01M4/881H01M4/8892H01M8/1004
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Quick Facts
Patent No.
US 12,308,445
App. No.
17/757,539
Granted
May 20, 2025
Kind
B2
Abstract

Methods of preparing catalyst materials are provided. The catalyst material comprise electrocatalyst particles, a support material, and graphitic carbon nitride. The methods comprise applying graphitic carbon nitride to a catalyst material precursor.

Claims (9)

1. A method of preparing catalyst material which comprises electrocatalyst particles, a support material, and graphitic carbon nitride, said method comprising the steps of:

(i) providing a catalyst material precursor comprising electrocatalyst particles dispersed on a support material, wherein the catalyst material precursor does not comprise graphitic carbon nitride; then

(ii) applying graphitic carbon nitride to the catalyst material precursor provided in step (i) by contacting the catalyst material precursor with a graphitic carbon nitride precursor compound and applying conditions to transform the graphitic carbon nitride precursor to graphitic carbon nitride.

2. The method according to claim 1 , wherein the catalyst material comprises no more than 5 wt % of graphitic carbon nitride by total weight of the graphitic carbon nitride and the support material.

3. The method according to claim 1 , wherein the catalyst material comprises electrocatalyst particles, a support material, and graphitic carbon nitride, wherein the electrocatalyst particles are dispersed on the support material, and wherein the catalyst material comprises no more than 5 wt % of graphitic carbon nitride by total weight of the graphitic carbon nitride and the support material.

4. The method of claim 1 , wherein loading of graphitic carbon nitride on the support material is no more than 5 wt % by total weight of the graphitic nitride and the support material.

5. The method of claim 1 , wherein loading of graphitic carbon nitride on the support material is no more than 2 wt % by total weight of the graphitic nitride and the support material.

6. The method of claim 1 , wherein the graphitic carbon nitride is dispersed over at least 80% of a free surface of the support material.

7. The method of claim 1 , wherein the conditions comprise heating to a temperature of 250° C. to 750° C.

Assignments (3)
CHANGE OF ADDRESS Recorded Jan 14, 2026
From: JOHNSON MATTHEY HYDROGEN TECHNOLOGIES LIMITED
To: JOHNSON MATTHEY HYDROGEN TECHNOLOGIES LIMITED
Reel/Frame 074818/0894 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 5, 2022
From: BONAKDARPOUR, ARMAN; DANIEL, LIUS; FANG, BAIZENG; SHARMAN, JONATHAN; WILKINSON, DAVID
To: JOHNSON MATTHEY FUEL CELLS LIMITED
Reel/Frame 060396/0204 →
CHANGE OF NAME Recorded Jul 5, 2022
From: JOHNSON MATTHEY FUEL CELLS LIMITED
To: JOHNSON MATTHEY HYDROGEN TECHNOLOGIES LIMITED
Reel/Frame 060574/0655 →
Priority Claims (1)
GB 2001890 · Feb 12, 2020 · national
Continuity (1)
Related Publication 20230019857A1 · Jan 19, 2023
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