With growing concerns about global warming being a major challenge of our time, alternatives to fossil fuel are sought across many branches of science. One approach is the improvement of fuel cell technology. In hydrogen fuel cells, the high demand for platinum catalysts for the two electrochemical half-reactions limits both sustainability and roll-out on a large scale. Especially for the kinetically hindered oxygen reduction reaction (ORR), where four electrons are transferred, the platinum load is high. In the search for alternative catalysts, single-atom metal-N-C catalysts and among them especially FeNC catalysts, have been found promising and hence became a highly active field of research.