In recent times, production of hydrogen by water splitting has introduced a new era to sustainable energy storage and fuel cell technology. To simplify the design of the water splitting devices and enhance its activity, a new thrust to develop low cost, stable, earth abundant electrocatalysts which can participate in both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is the need of the hour. Here, we report the two-step hydrothermally synthesized nickel diselenide hexagonal flakes deposited on carbon cloth (NiSe₂/CC) which has acted as efficient electrocatalyst for both HER and OER in alkaline medium. Necessary characterizations are performed. The NiSe₂ sheet comprises small hexagonal flakes in nanoscale with numerous active sites having hydrophilic nature insist us to choose it as an electrocatalyst resulting in enhanced charge transfer mechanism. The binder free NiSe₂/CC exhibits superior catalytic activity employing overpotential of −111 mV and 210 mV in HER and OER to draw 10 mA/cm² current density, respectively in 1M KOH solution. Sustainability of electrocatalyst is also investigated in extreme pH. Thus, the water splitting device which consists of NiSe₂/CC electrodes as cathode and anode in 1M KOH electrolyte, requires only 1.47 V to achieve 10 mA/cm² current density.

近年来，通过水分解生产氢气已将可持续能源存储和燃料电池技术引入了一个新时代。为了简化分水装置的设计并增强其活性，需要开发低成本，稳定，富含地球的电催化剂，该电催化剂可同时参与析氢反应（HER）和析氧反应（OER）的新动力。小时。在这里，我们报告了两步水热合成沉积在碳布（NiSe ₂ / CC）上的二硒化镍六边形薄片，该薄片已成为碱性介质中HER和OER的有效电催化剂。进行必要的表征。NiSe ₂该薄片包含纳米级的六边形小薄片，具有许多具有亲水性的活性位点，这使我们选择它作为电催化剂，从而增强了电荷转移机制。不含粘合剂的NiSe ₂ / CC在HER和OER中的过电势分别为-111 mV和210 mV，表现出卓越的催化活性，分别在1M KOH溶液中产生10 mA / cm ^2的电流密度。还研究了在极端pH值下电催化剂的可持续性。因此，由NiSe ₂ / CC电极作为1M KOH电解质中的阴极和阳极组成的分水装置仅需要1.47 V的电压即可达到10 mA / cm ^2的电流密度。