| 초록 |
Because of lower theoretical splitting potential and environmental concerns, the urea oxidation reaction is a prominent alternative to the oxygen evolution reaction (OER). Using hydrothermal and electrodeposition, ultrathin bimetal metal-organic frameworks (MOF) (NiCu-BDC) adorned with electro-active nickel hydroxide (Ni(OH)2) is successfully synthesized in this study. The synergistic effect of redistribution of electron density in NiCu-BDC and chemical reduction of Ni(OH)2 during the urea oxidation process shows improved electrocatalytic performance. The NiCu-BDC@Ni(OH)2 electrocatalyst exhibits notable urea oxidation (UOR) activity with potentials of 1.37 and 1.38 V versus RHE required to reach 10 mA cm−2 and 100 mA cm-2 in 1.0 M KOH containing 0.33 M urea solution, respectably. For overall water splitting, a lower potential of 1.79 V is required to gain a current density of 50 mA cm−2 in the urea-containing electrolyte, whereas it shows a lower operating potential of 1.91 V at 50 mA cm−2 in 1.0 M KOH. |
