Rust (image) Helmholtz-Zentrum Berlin für Materialien und Energie Share Print E-Mail Caption Rust would be an extremely cheap and stable photoelectrode material to produce green hydrogen with light. But the efficiency is limited. The TEM image shows a photoanode containing a thin photoactive layer of rust. Credit Technion Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.