Constantin obtained his doctorate degree in the group of Prof. Ueli Heiz at the Technical University of Munich (Catalysis Research Center). He investigated photocatalytic hydrogen evolution using sub-nanometer Pt clusters on semiconductors to disentangle photocatalytic from thermal reaction steps. He was co-advised by Prof. Martin Stutzmann (Walter-Schottky Institute, Technical University of Munich) in a collaborative project where he explored photochemical reactions of III-V semiconductor surfaces in relation to the semiconductor’s photophysical properties.

In the Friend Group, he examines semiconducting oxides for complex chemical surface reactions to determine the effect of single atom co-catalysts on surface (photo-)chemistry.