(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.