Hydrogen Fuel Cell Catalysts and Support

Description:

A highly stable porous graphitic carbon support for Pt-based catalysts used in proton exchange membrane fuel cells.

 

Background:

 

Proton exchange membrane fuel cells (PEMFC) are the leading technology for hydrogen fuel cell vehicles. However, broad PEMFC commercialization has been limited by factors including high cost, insufficient durability, and limited power density.  Because over 40% of the current cost of PEMFCs is due to the need for Pt catalysts to help drive the otherwise sluggish oxygen reduction reaction (ORR) at the cathode, which governs the overall performance of PEMFCs, most efforts to improve PEMFCs have been focused on reducing or replacing Pt.  Pt-metal alloys have been explored and hold promise, but their carbon supports are vulnerable to corrosion under harsh operating conditions, leading to poor performance durability.

 

 

Technology Overview:

 

This invention provides porous graphitic carbon (PGC) supports that are highly graphitized to resist corrosion.  These PCG supports possess a high surface area (~500 m2/g) as well as a favorable environment to disperse Pt nanoparticles and prevent agglomeration.  Further, they significantly enhanced activity and stability with Pt catalysts in membrane electrode assembly tests.  For example, after 5,000 cycles, the PGC-supported Pt catalyst lost only 9 mV at a current density of 1.5 A/cm2 while the commercial carbon-supported Pt catalyst lost 200 mV.

 

Publication Link:        

 

Nature Catalysis 2019. 2, 578-589

Energy Environ. Sci. 2019. 12, 2830-2841

              

Advantages:

 

Compared with the commercial Pt/C catalyst, PGC-supported Pt exhibited one-fifth the corrosion rate.

 

Applications:

 

•       Proton exchange membrane fuel cells

 

Intellectual Property Summary:

 

US Provisional Patent Application  63/051,703 filed July 14, 2020.

 

Stage of Development: Prototype demonstration.

 

Licensing Status: Available for licensing or collaboration.

 

 

Patent Information:
Category(s):
University at Buffalo
For Information, Contact:
Timothy Dee
Associate Director
University at Buffalo
716-645-8139
tpdee@buffalo.edu
Inventors:
Gang Wu
Zhi Qiao
Jacob Spendelow (non-UB)
Keywords:
Technologies
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