We have developed three-dimensional honeycomb-like Cu0.81Co2.19O4 nanosheet arrays supported by Ni foam using electrochemical codeposition of cobalt and copper hydroxides followed by thermal oxidation. The inclusion of copper during codeposition alters the morphology of the cobalt hydroxide, resulting in honeycomb-like nanostructures and significantly lowering the onset potential for oxygen evolution. The Cu0.81Co2.19O4 anode shows an exceptionally low overpotential of 290 mV at a current density of 10 mA cm–2 in 1 M KOH. Additionally, an anion-exchange membrane water electrolysis cell utilizing this anode achieves a current density of 100 mA cm–2 at 1.68 V in 0.1 M KOH. – Journal cover design by scapiens
[Scientific Journal cover design] Low-Thermal-Budget Fluorite-Structure Ferroelectrics for Future Electronic Device Applications
In article number 2100028, Jiyoung Kim, Si Joon Kim, and their team review key factors involved in developing fluorite-structure ferroelectrics
