Di Mauro Angelo, Ursino Federico, Mineo Giacometta, Terrasi Antonio, Mirabella Salvo
Dipartimento di Fisica e Astronomia "Ettore Majorana", Università degli Studi di Catania, Via S. Sofia 64, 95123 Catania, Italy.
CNR-IMM, Università di Catania, Via S. Sofia 64, 95123 Catania, Italy.
Nanomaterials (Basel). 2025 Sep 8;15(17):1380. doi: 10.3390/nano15171380.
The sustainable development of our society faces significant challenges, including the need for environmentally friendly energy storage devices. Our work is concerned with the conversion of Mo-based recycled industrial waste into active nanocatalysts for energy storage applications. To reach this goal, we employed hydrothermal synthesis, a low-cost and temperature-scalable method. The proposed synthesis produces MoO nanobelts (50-200 nm in width and 2-5 µm in length) with a high yield, about 74%. The synthesized nanostructures were characterized in 1 M KOH and 1 M NHOH, as alkaline environments are a promising choice for the development of eco-friendly devices. To investigate the material's behaviour cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS) measurements were carried out. From CV curves, it was possible to evaluate the specific capacitance values of 290 and 100 Fg at 5 mVs in 1 M KOH and 1 M NHOH, respectively. Also, GCD was employed to evaluate the specific capacitance of the material, resulting in 75 and 60 Fg in 1 M KOH and 1 M NHOH, respectively. CV and GCD analyses revealed that MoO nanobelts act as two different types of energy storage devices: supercapacitors and pseudocapacitors. Additionally, EIS allowed us to distinguish between the resistive and capacitive behaviour contributions depending on the electrolyte. Furthermore, it provided a comprehensive electrochemical characterization in different alkaline electrolytes, with the intention of conjugating waste management and sustainable energy storage device production.
我们社会的可持续发展面临重大挑战，其中包括对环境友好型储能设备的需求。我们的工作致力于将钼基回收工业废料转化为用于储能应用的活性纳米催化剂。为实现这一目标，我们采用了水热合成法，这是一种低成本且可调节温度的方法。所提出的合成方法能够高产率地制备出宽度为50 - 200纳米、长度为2 - 5微米的MoO纳米带，产率约为74%。所合成的纳米结构在1 M KOH和1 M NHOH中进行了表征，因为碱性环境是开发环保型设备的一个有前景的选择。为了研究该材料的行为，进行了循环伏安法（CV）、恒电流充放电（GCD）和电化学阻抗谱（EIS）测量。从CV曲线可以分别评估在1 M KOH和1 M NHOH中，扫描速率为5 mV/s时的比电容值为290和100 F/g。此外，GCD用于评估材料的比电容，在1 M KOH和1 M NHOH中分别得到75和60 F/g。CV和GCD分析表明，MoO纳米带可作为两种不同类型的储能设备：超级电容器和赝电容器。此外，EIS使我们能够根据电解质区分电阻和电容行为的贡献。此外，它在不同碱性电解质中提供了全面的电化学表征，目的是将废物管理与可持续储能设备生产相结合。
