The appeal of artificial photosynthesis, in which the electrochemical reduction of carbon dioxide is used to produce clean, green and sustainable fuels, is that we can turn an atmospheric byproduct into a renewable energy technology.
However, finding a catalyst for reducing carbon dioxide that is highly selective and efficient has proven to be a huge scientific challenge.
Peidong Yang, a chemist with Berkeley Lab's Materials Sciences Division, led a study in which bimetallic nanoparticles of gold and copper were used as the catalyst for the carbon dioxide reduction. The results experimentally revealed for the first time the critical influence of the electronic and geometric effects in the reduction reaction.