Light-activated, single- ion catalyst breaks down carbon dioxide

X-ray studies reveal structural details that may point the way to designing better catalysts for converting pollutant gas into useful products

A team of scientists has discovered a single-site, visible-light-activated catalyst that converts carbon dioxide (CO2) into “building block” molecules that could be used for creating useful chemicals. The discovery opens the possibility of using sunlight to turn a greenhouse gas into hydrocarbon fuels.

The scientists used the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science user facility at Brookhaven National Laboratory, to uncover details of the efficient reaction, which used a single ion of cobalt to help lower the energy barrier for breaking down CO2. The team describes this single-site catalyst in a paper just published in the Journal of the American Chemical Society.

Converting CO2 into simpler parts—carbon monoxide (CO) and oxygen—has valuable real-world applications. “By breaking CO2, we can kill two birds with one stone—remove CO2 from the atmosphere and make building blocks for making fuel,” said Anatoly Frenkel, a chemist with a joint appointment at Brookhaven Lab and Stony Brook University. Frenkel led the effort to understand the activity of the catalyst, which was made by Gonghu Li, a physical chemist at the University of New Hampshire.

>Read more on the NSLS-II at Brookhaven National Laboratory website

Image: National Synchrotron Light Source II (NSLS-II) QAS beamline scientist Steven Ehrlich, Stony Brook University (SBU) graduate student Jiahao Huang, and Brookhaven Lab-SBU joint appointee Anatoly Frenkel at the QAS beamline at NSLS-II.