Abstract
? 2022 Elsevier B.V.A commercially available INVAR alloy was subjected to the electrochemical conditionings including Fe-leaching and chronopotentiometric aging, to modulate surface composition and stabilize electrocatalysts for efficient and facile oxygen evolution reaction (OER). Owing to the complexing function of KSCN during Fe-leaching for the optimum Ni/Fe ratio and the stabilization of Fe-doped (oxy)hydroxides under the adequately higher current density within alkaline media, the OER electrode composed solely of 4J36 INVAR alloy as substrate needs an overpotential of only 250 mV to attain 10 mA cm?2 in 1 M KOH, besides its performance stability at two different current densities. This simple and cost-effective fabrication of OER electrode, which is binder-free, self-supporting and matrix-rejuvenating, will open a new door to the cutting-edge design of electrocatalyst for water splitting.
NSTL
Elsevier