Carbon dioxide, emitted mainly by combustion of fossil fuels, is harmful to the climate and the main reason for increased global warming. Diverting carbon dioxide into hydrogen carriers or chemicals such as methanol, a valuable raw material and energy carrier, is thus highly desired. Supported metal nanoparticle heterogeneous catalysts such as copper on zinc oxide is used for the catalytic conversion of carbon dioxide to methanol. Researchers have now discovered that it is possible to avoid by-products and at the same time make the process more sustainable by adding a small amount of gold to the catalyst.
Size of support particles is key to catalytic converter efficiency
In a study conducted at MAX IV and other European synchrotrons, researchers from the Netherlands and Belgium show that the catalytic activity of highly distributed palladium depends on the size of the cerium dioxide support particles. Optimising particle size can lead to a more effective conversion of toxic carbon monoxide exhaust even in challenging cold start conditions. The study was published in the journal SCIENCE.