It sounds like magic: photoelectrodes could convert the greenhouse gas CO 2 back into methanol or N 2 molecules into valuable fertiliser - using only the energy of sunlight. An HZB study has now shown that diamond materials are in principle suitable for such photoelectrodes. By combining X-ray spectroscopic techniques at BESSY II with other measurement methods, Tristan Petit's team has succeeded for the first time in precisely tracking which processes are excited by light as well as the crucial role of the surface of the diamond materials.

https://www.miragenews.com/spectroscopy-reveals-key-role-of-diamond-1089617/

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