Hyzon Motors. has filed a patent for a membrane electrode assembly (MEA) that includes a unique combination of catalyst and co-catalyst layers to cap cathode and anode potentials. The assembly features a proton exchange membrane with noble metal catalyst and noble metal doped rare-earth oxide co-catalyst layers. GlobalData’s report on Hyzon Motors gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Hyzon Motors, Hydrogen fuel cells was a key innovation area identified from patents. Hyzon Motors's grant share as of January 2024 was 23%. Grant share is based on the ratio of number of grants to total number of patents.

Membrane electrode assembly with noble metal and rare-earth oxide

Source: United States Patent and Trademark Office (USPTO). Credit: Hyzon Motors Inc

The patent application (Publication Number: US20240030472A1) describes a membrane electrode assembly for fuel cells, consisting of a proton exchange membrane sandwiched between two electrode layers. One of the electrode layers contains a catalyst with a noble metal and a co-catalyst with a noble metal doped rare-earth oxide, such as platinum doped cerium oxide. The noble metal doped rare-earth oxide can be integrated into the electrode layers or provided as a separate layer, offering a reservoir of hydrogen for fuel cell operation.

Furthermore, the membrane electrode assembly can be used in fuel cells, fuel stacks, and vehicles, providing efficient proton exchange and hydrogen storage capabilities. The method of operating a fuel cell with this assembly involves transitioning between start-up and shut-down states, utilizing the noble metal doped rare-earth oxide to maintain a hydrogen reservoir. The integration of platinum doped cerium oxide into the anode layer, along with a carbon support, enhances the performance and longevity of the fuel cell system, ensuring optimal functionality and energy efficiency.

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