Ali Han , Haotian Wu , Zijun Sun , Hongxing Jia , Zhiping Yan , Hao Ma , Xiang Liu , and Pingwu Du *
Journal: ACS Appl. Mater. Interfaces
water splitting; cobalt oxide; oxygen production; electrodeposition
In this study, we report for the first time on the use of a water-soluble BF2-annulated cobaloxime, Co(dmgBF2)2(OH2)2 (Co-DMB, dmgBF2 = difluoroboryl-dimethylglyoxime), as a catalyst precursor for electrocatalytic water oxidation. Oxygen gas bubbles were clearly produced on the FTO electrode at a low overpotential under neutral pH conditions containing Co-DMB. Interestingly, stable green films were produced under these conditions. The current densities can reach to >5 mA/cm2 at 1.1 V and >10 mA/cm2 at 1.5 V (vs Ag/AgCl). The morphologies of the films showed nanoribbon structures, which were characterized by scanning electron microscope (SEM), energy-dispersive X-ray analysis (EDX), and X-ray photoelectron spectroscopy (XPS).
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