By utilizing experimental electrochemical analyses, mass spectrometry, and computational quantum chemistry modeling, the researchers created an ‘atomic-scale storyline’ to elucidate how ozone is generated on NATO electrocatalysts. They recognized that a few of the nickel in NATO might be leaching out of the electrodes through corrosion, and these nickel atoms, now floating within the resolution close to the catalyst, can promote chemical reactions that ultimately generate ozone.