NiCo2O4 nanowire array on carbon cloth (NiCo2O4/CC) is proposed as a highly active electrocatalyst for ambient nitrate (NO3−) reduction to ammonia (NH3). In 0.1 m NaOH solution with 0.1 m NaNO3, such NiCo2O4/CC achieves a high Faradic efficiency of 99.0% and a large NH3 yield up to 973.2 µmol h−1 cm−2. The superior catalytic activity of NiCo2O4 comes from its half‐metal feature and optimized adsorption energy due to the existence of Ni in the crystal structure. A Zn‐NO3− battery with NiCo2O4/CC cathode also shows a record‐high battery performance.

§ Longcheng Zhang and Jie Liang contributed equally to this work. Benzoate anions-intercalated NiFe-LDH nanosheet on carbon cloth (BZ-NiFe-LDH/CC) behaves as a highly efficient and durable electrocatalyst for alkaline seawater oxidation. In alkaline seawater, it attains the current density of 500 mA cm -2 at a low overpotential of 610 mV for 100-h uninterrupted electrolysis with no obvious structural change, reflecting significantly boosted activity and resistance toward chlorine species corrosion.

Owing to the high power density and ultralong cycling life, supercapacitors represent the alternative to electrochemical batteries in energy storage applications. However, the relatively low energy density is the main...

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The development of efficient electrocatalysts from earth-abundant elements for the oxygen evolution reaction (OER) is highly desired. Here, we report the electrodeposition of NiCo layered double hydroxide nanosheet array on...

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Supercapacitors (SCs) are promising for bridging the power/energy gap between conventional capacitors and batteries/fuel cells. However, challenges remain in the improvement of electrode materials toward high capacitive performance. Electrospun nanofibers,...