The development of economical, durable, and efficient oxygen evolution reaction (OER) electrocatalysts is essential for large-scale industrial water electrolysis. Here, a straightforward strategy is proposed to synthesize a series of nickel selenide nanosheets supported on nickel foam (NiSe₂/NF) materials by directly selenizing nickel foam substrates at different temperatures under an inert atmosphere. When evaluated as electrocatalysts in OER, the optimal self-supported NiSe₂/NF-350 shows an excellent performance in 1.0 M KOH medium with an overpotential of 458 mV at 100 mA cm⁻², a small Tafel slope of 45.8 mV dec⁻¹, and a long-term stability for 36 h. Furthermore, the structural and compositional preservation for NiSe₂/NF-350 after stability test was also verified by various characterizations.

开发经济、耐用、高效的析氧反应 (OER) 电催化剂对于大规模工业水电解至关重要。在这里，提出了一种直接的策略，通过在惰性气氛下在不同温度下直接硒化泡沫镍基材，合成一系列负载在泡沫镍（NiSe _{2 /NF）材料上的硒化镍纳米片。}当作为 OER 中的电催化剂进行评估时，最佳的自支撑 NiSe ₂ /NF-350 在 1.0 M KOH 介质中表现出优异的性能，在 100 mA cm ^{-2下具有 458 mV 的过电位，45.8 mV dec -1}的小 Tafel 斜率, 并长期稳定 36 h。此外，NiSe _{2的结构和组成保存}/NF-350 在稳定性测试后也通过各种表征进行了验证。