We have successfully synthesized interfacially coupled Ni/Ni(OH)2 nanocomposites using a simple one-step hydrothermal method with varying amounts of hydrazine. These nanocomposites, acting as bifunctional catalysts for overall water splitting, show significant enhancement in both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) due to the reconfiguration of electrons at the metal-semiconductor interface and the optimized composition of Ni and Ni(OH)2. The optimal hybrid electrode achieves low overpotentials of 310 mV for OER and 168 mV for HER at a current density of 10 mA cm–2 in 1 M KOH. When used in an alkaline electrolyzer, this catalyst shows an excellent low onset potential of 1.43 V and a current density of 10 mA cm–2 at a very low cell voltage of 1.68 V. Additionally, the symmetric cell demonstrates remarkable long-term durability with negligible degradation after 16 hours of continuous operation. This synthesis method can be applied to other transition metals to create metal/metal hydroxide hybrid composites with enhanced electrochemical performance for energy storage and conversion applications.-Scientific 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
