Scientists Uncover Cause of Platinum Electrode Corrosion
A team from Leiden University and the SLAC National Accelerator Laboratory has identified the root cause of platinum electrode corrosion, a discovery that could enhance green hydrogen production and improve electrochemical sensors. The findings were published in Nature Materials.
While platinum is known for its durability, the study revealed that negatively polarized platinum electrodes degrade rapidly in electrolyte environments, such as saltwater. The degradation mechanism was observed using advanced X-ray spectroscopy techniques at SLAC’s Stanford Synchrotron Radiation Lightsource.
The researchers determined that platinum hydrides, not previously confirmed as a key factor, are responsible for the corrosion. Using high-energy-resolution X-ray absorption spectroscopy and computer modeling, the team recorded the first-ever observations of platinum actively corroding during operation. The results confirmed that platinum hydride formation leads to the breakdown of the electrode material.
This breakthrough enables the development of solutions to mitigate corrosion in electrolyzers and other devices reliant on platinum electrodes. The project underscores the importance of combining expertise and advanced technologies to address long-standing scientific challenges.
