TEM images of catalyst (IMAGE) DOE/Brookhaven National Laboratory Caption High-resolution electron microscopy images of the catalyst captured at the CFN. Frame A shows the catalyst with a scale bar representing 20 nanometers (nm) after three consecutive reaction cycles; B zooms in to reveal surface details; C provides a composite elemental map, with individual elements shown in D, E, and F. Together the images reveal that the active metal, palladium (Pd), is highly dispersed on the supporting cerium (Ce) substrate with a thin layer of carbon (C) at the interface. Credit Sooyeon Hwang/Brookhaven National Laboratory Usage Restrictions OK for use with stories about this research License Original 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.