Ce doped Ni(OH)2/Ni-MOF nanosheets as an efficient oxygen evolution and urea oxidation reactions electrocatalyst

Metal-organic frameworks (MOFs) are widely recognized as precursors or sacrificial templates for the synthesis of target catalysts on account of their high porosity and high active surface area . Elemental doping strategy is considered as an effective method for the synthesis of efficient and stable catalysts for electrolytic water. Therefore, in this paper, Ce-doped Ni(OH) 2 nanoparticles and Ni-MOF nanosheets composites were synthesized by electrodeposition using Ni-MOF as precursor. Catalyst Ce–Ni(OH) 2 @Ni-MOF/NF displays excellent OER performance, requiring only 193 mV and 279 mV overpotentials to realize current densities of 10 mA cm −2 and 100 mA cm −2 , respectively, while the UOR performance was very remarkable, only a potential of 1.28 V was demanded to reach a current density of 10 mA cm −2 . In addition, no obvious change in the overpotential was noticed during the stability test of 16 h, indicating good stability of Ce–Ni(OH) 2 @Ni-MOF/NF. This study provides a meaningful reference for the design of an efficient and stable environmental friendly electrocatalyst .