Polymer-Coated Catalyst Protects (IMAGE) Helmholtz Association Caption This complex solar cell is coated with two different catalysts and works like an "artificial leaf," using sunlight to split water and yield hydrogen gas. Credit Photo: HZB Usage Restrictions None License Licensed content 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.