Unprecedented urea oxidation on Zn@Ni-MOF with an ultra-high current density: understanding the competition between UOR and OER, catalytic activity limitation and reaction selectivity

Zn-doping populates the catalytically active Ni 3+ -OOH sites, and subsequently prevents the detrimental competition between the UOR and OER. Consequently, Zn@Ni-MOF demonstrates an outstanding ultra-high UOR current density.