SunGreenH2, a Singapore-based cleantech company founded in 2020, develops low-cost and high-performance electrodes for water electrolyzers. The electrodes reduce the use of platinum group metals and feature a high catalytic surface area. They can be directly used in commercial water electrolyzers today to achieve cost-effective green hydrogen production.
Challenges: hydrogen fuel
Green hydrogen (H₂) is a crucial element of the future net-zero world. Using electricity from renewable sources, such as nuclear, solar, and wind, to split water produces green hydrogen. Green hydrogen can decarbonize hard-to-abate industries, such as steel manufacture, long-distance transportation, shipping, and aviation. Seasonally, it can also store renewable electricity and serve as a chemical feedstock.
There are several ways to use electricity to turn water into hydrogen right now. These include alkaline electrolyzers, proton exchange membrane (PEM) electrolyzers, anion-exchange membrane (AEM) electrolyzers, and solid oxide electrolysis cells.
One problem with electrolyzer systems for making hydrogen is that their performances don't last very long, and the electrode materials used are very expensive. There is a push to reduce the use of platinum group metals or completely get rid of the need for platinum group metals by making other electrode catalysts without compromising their performance.
SunGreenH2 Technology
SunGreeH2 has developed an electrode fabrication technology that uses 30 times less platinum group metals. The electrodes have a high catalytic surface area, which is achieved through micro- and nanofabrication technology. Electrolyzers employing SunGreeH2’s electrodes have an increased current density, a reduced operation voltage, and long-term stability compared to conventional electrolyzers.
SunGreenH2 electrode fabrication
The diagram below illustrates SunGreenH2’s electrode fabrication processes.
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