To sever society’s tether from fossil fuels, the development of more efficient catalysts for renewable energy production is a recognized, key step. On surfaces covered by 2D materials, a more detailed picture of the reaction process will greatly enhance our understanding, according to a recent study in ACS Catalysis. Researchers in Sweden have observed the effects of hydrogen and other gas combinations on 2D material graphene during undercover reactions using ambient-pressure XPS at MAX IV’s HIPPIE beamline.