It is extremely significant but still challenging to develop effective and stable electrocatalysts for water splitting, which is recommended as a promising technology to produce hydrogen. Herein, leaf‐like Ni3S2 nanosheets grown on the nickel foam fabricated by a novel one‐step dynamic hydrothermal method is demonstrated. Based on the new method, such catalyst with high and uniform dispersion exhibits superior activity and stability for both hydrogen evolution reaction and oxygen evolution reaction in basic electrolyte. Moreover, the as‐prepared Ni3S2 as two electrode catalysts of overall water splitting exhibits remarkable bifunctional activities with a small cell voltage of 1.45 V at a current density of 10 mA cm−2. This work can provide a new prospect for optimizing Ni3S2 growth to enhance its electrocatalytic performances.
NiFe-based catalysts have attached a great attraction due to their high activity in alkaline water oxidation. However, potential metal dissolution, especially Fe, causes gradual activity deactivation during oxygen evolution reaction...
Air cathodes with highly effective oxygen reduction and oxygen evolution reaction performance are crucial for commercial applications in rechargeable Zn-air batteries (RZABs). Commercial catalysts are expensive and scarce, which restricts their practical applications. Therefore, the design of high-costperformance and electrochemical activities bifunctional nonprecious metal catalysts is urgent. The bifunctional catalyst (BZIF-C@LDH) combining NiFe-LDH and ZIF-8&ZIF-67 derivative (BZIF-C) was readily prepared with a co-precipitation approach.As expected, the obtained BZIF-C@LDH exhibits outstanding bifunctional performance (ΔE = 0.761 V) for oxygen reduction and oxygen evolution reaction. Furthermore, compared to commercial Pt/C-RuO 2 in RZABs, BZIF-C@LDH displays a superior energy density (1033 Wh kg À 1 ), which is close to the theoretical energy density (1086 Wh kg À 1 ). This work provides a straightforward and inexpensive strategy for the synthesis of excellent and practicable bifunctional catalysts for RZABs.
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