Enhancing the stability of cobalt spinel oxide towards sustainable oxygen evolution in acid

Active and stable electrocatalysts for the oxygen evolution reaction are required to produce hydrogen from water using renewable electricity. Here we report that incorporating Mn into the spinel lattice of Co3O4 can extend the catalyst lifetime in acid by two orders of magnitude while maintaining the activity. The activation barrier of the obtained spinel Co2MnO4 is comparable to that of state-of-the-art iridium oxides, most probably due to the...