Developing earth abundant electrocatalyst is imperative to large-scale hydrogen production for transforming current fossil fuel-based economy into future renewable energy economy. In this paper, we report the synthesis of self-supported V_OB-Co₃O₄/NF nanowire arrays directly grown on Ni foam, which can serve as a trifunctional catalyst for producing hydrogen and oxygen by electrolyzing water in alkaline media or producing hydrogen via hydrolyzing alkaline NaBH₄ solution. The engineered boron and oxygen defects in Co₃O₄ nanowires prove to effectively modulate their electronic structure leading to the increased electrical conductivity and create a large quantity of electroactive sites. The resulting self-supported V_OB-Co₃O₄/NF electrode delivers a current density of 50 mA cm⁻² at overpotentials of 184 mV for hydrogen evolution reaction (HER) and 315 mV for oxygen evolution reaction (OER) in 1.0 M KOH with excellent stability and durability. The V_OB-Co₃O₄/NF as both cathode and anode requires 1.67 V to achieve a current density of 10 mA cm⁻² for overall water splitting reaction. Besides, V_OB-Co₃O₄/NF presents much higher hydrogen generation rate (HGR) of 7055 mL min⁻¹ g_catalyst⁻¹ with activation energy (E_a) of ca. 29.7 kJ mol⁻¹. for hydrolytic dehydrogenation of alkaline NaBH₄ solution, outperforming most of the reported non-noble metal-based catalysts and even precious metal catalysts.

发展地球上丰富的电催化剂对于大规模氢生产是必不可少的，以将当前基于化石燃料的经济转变为未来的可再生能源经济。在本文中，我们报道了直接在镍泡沫上生长的自支撑V _O B-Co ₃ O ₄ / NF纳米线阵列的合成，该阵列可作为三功能催化剂，通过在碱性介质中电解水或生产氢和氧通过水解碱性NaBH ₄溶液产生氢。Co ₃ O _4中的工程硼和氧缺陷纳米线被证明可以有效地调节其电子结构，从而导致电导率的增加并产生大量的电活性位。所得自支撑V _ö B-钴₃ ö ₄ / NF电极提供的50毫安cm 2的电流密度^-2在析氢反应184毫伏的超电势（HER）和在1.0 315毫伏析氧反应（OER） M KOH具有出色的稳定性和耐久性。在V _Ô B-钴₃ ö ₄ / NF作为阴极和阳极，需要1.67 V到实现为10mA cm 2的电流密度^-2整体水分解反应。此外，V _ö B-钴₃ ö₄ / NF的氢生成速率（HGR）更高，为7055 mL min ^-1 g_催化剂^-1，活化能（E _a）为ca。29.7 kJ mol ^-1。用于碱性NaBH ₄溶液的水解脱氢，性能优于大多数报道的非贵金属基催化剂，甚至优于贵金属催化剂。