Hafnium incorporation modulating the electronic structure of NiFe layered double hydroxides for effective oxygen evolution

Transition metal Hf doping in NiFe LDHs alters the chemical environment of Ni and Fe, enhancing the electronic synergy among the three metals. In an alkaline environment, the prepared NiFeHf LDH electrodes display a low OER overpotential of 177 mV at 10 mA cm^-2, demonstrating superior OER activity.