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Active bifunctional electrocatalysts for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are badly required for high‐efficiency zinc–air batteries (ZABs). Herein, a Fe‐alloyed MoNi nanohybrid (MoNiFe) as bifunctional catalyst is reported. The alloyed MoNiFe architecture with the decreased size compared with MoNi is obtained by a hydrothermal reduction method, which enhances the exposed active sites and promotes the charge transfer. Accordingly, MoNiFe exhibits good bifunctionality, with a positive half‐wave potential (0.896 V) near Pt/C (0.812 V) in ORR reaction and a low overpotential (0.295 V) similar to IrO2 (0.29 V) in OER process. The as‐derived rechargeable ZAB cells based on the bifunctional MoNiFe catalyst show the peak power density of 58 mW cm−2 with a high open‐circuit voltage of 1.319 V. Thus, this work paves a new alloying avenue for synthesizing effective bifunctional electocatalysts for ZABs. [ABSTRACT FROM AUTHOR]

Electrolysis of water is a promising reaction to produce the sustainable energy of hydrogen that proceeds commonly by assistance of a highly efficient catalyst. Now, the development of highly efficient and low‐cost electrocatalysts has stimulated increasing interest. Herein, a new composited electrocatalyst of MoxC embedded in N‐doped carbon nanosheets (MoxC@NCS) is successfully prepared from a self‐assembly route. Due to the expanded interlayers of carbon NCS and enhanced active defective sites induced by two‐materials compositing, the as‐synthesized MoxC@NCS affords splendid hydrogen evolution reaction (HER, overpotential of 160 mV), as well as remarkable oxygen evolution reaction (OER, overpotential of 360 mV) at 10 mA cm−2 in alkaline water splitting. In view of earlier excellent performances, the bifunctional MoxC@NCS catalyst shows a low cell voltage of 1.56 V at 10 mA cm−2 in overall water splitting. In addition, the MoxC@NCS exhibits an outstanding stability after long‐term electrochemical measurements. These findings extend the potential application of carbon‐supported non‐noble metallic catalysts, being of great significance in sustainable energy‐related fields. [ABSTRACT FROM AUTHOR]

2D composited nanosheets of Mo2C/CoMoS4 are synthesized by a hydrothermal approach to obtain a bifunctional water‐splitting electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in aqueous alkaline solution. Due to the richened defects formed on the 2D catalyst, the as‐derived Mo2C/CoMoS4 exhibits high activity. At 10 mA cm−2, the HER and OER overpotentials of the 2D Mo2C/CoMoS4 nanosheets are just 117 and 250 mV, respectively, with the corresponding Tafel slope of 90 and 75 mV dec−1, near to the commercial Pt/C and IrO2. X‐ray photoelectron spectroscopy proves the strong interactions between Mo2C and CoMoS4 and the Raman analysis certifies the presence of richened defects in Mo2C/CoMoS4. Moreover, the Mo2C/CoMoS4 possesses a long‐term catalytic stability, showing potential application in the water splitting. [ABSTRACT FROM AUTHOR]