利用Cu-MOF对Mo2CT_x_ MXene表面进行改性以驱动电池、超级电容器及稳定电催化析氢

Advancements in copper-metal-organic frameworks (Cu-MOFs) and molybdenum carbide (Mo 2 CT x MXene) are gaining attention because of their exceptional electrochemical performance, which makes them suitable for various applications. This study investigates Cu-MOF, Mo 2 CT x , and Cu-MOF/Mo 2 CT x composites as potential electrocatalysts for the hydrogen evolution reaction (HER) [Xu et al. in Energy Fuels 38:7579–7613, 2024; Zhu et al. in J. Alloy. Compd. 973, 2024]. We further explore their suitability for integration into next-generation hybrid energy storage devices. The Cu-MOF nanocomposite is uniformly distributed across the surface of the stable Mo 2 CT x nanosheets, facilitated by the presence of robust chemical bonding and small channels. The Cu-MOF/Mo 2 CT x fabricated electrode showcased exceptional activity for the HER, requiring a low overpotential of 87.12 mV and a high Tafel slope of 52.54 mV/dec. The electrode was utilized to construct a hybrid supercapattery device in combination with activated carbon (AC) for efficient energy storage. The novel hybrid energy storage device demonstrated an outstanding synergy of high energy density (66 Wh/kg) and exceptional power density (876 W/kg), significantly outperforming conventional supercapacitors. Additionally, theoretical analyses were applied to distinguish the capacitive and diffusive contributions-based on experimental data. This investigation highlights a groundbreaking advancement in electrode design, offering remarkable reactivity and opening new avenues for progress in energy storage and electrochemical water-splitting technologies.