The innovation in highly efficient, stable, and economical bifunctional overall water-splitting electrocatalysts is critical in developing sustainable energy, but it remains challenging. In this research, we have developed an unsophisticated method to synthesize hybrid nanoparticles (FeN 0.023 /Mo 2 C/C) uniformly dispersed in nitrogendoped carbon nanosheets. The two active components FeN 0.023 and Mo 2 C are coupled to form an FeN 0.023 /Mo 2 C/C heterostructure being a highly efficient electrocatalyst, which gives low overpotentials of 227/76 mV for OER/HER at 10 mA cm −2 current density. The alkaline-electrolyzer with FeN 0.023 /Mo 2 C/C as the anode−cathode catalyst needs merely 1.55 V to reach 10 mA cm −2 and can maintain a stable state for a minimum of 10 h. This research gives a simple effective resolution in designing affordable and useful overall water-splitting electrocatalysts.
Variable supramolecular structures constructed by bis-(2,2':6',2''-terpyridine)-4'-oxyhexadecane (BT-O-C16) on a highly oriented pyrolytic graphite (HOPG) surface were investigated by scanning tunneling microscopy (STM). Seven different solvents (1-phenyloctane, n-tetradecane, n-dodecane, n-decane, n-octane, 1-heptanoic acid, and 1-octanoic acid) were utilized to affect the self-assembling structures of BT-O-C16 at liquid/HOPG interfaces. High-resolution STM analyses revealed that various nanostructures were formed by the change of molecular conformation, which are actually driven by the cooperative interaction effect under different environments. Therefore, the solvent-induced cooperative influence on the molecular self-assembly is important for constructing supramolecular nanostructures.
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