View in EDS

Synthesis and characterization of HKUST-1/MgH2 nanocomposites for high-performance supercapacitors and energy conversion.

Saved in:
Bibliographic Details
Title: Synthesis and characterization of HKUST-1/MgH2 nanocomposites for high-performance supercapacitors and energy conversion.
Authors: Al-Hadeethi, Yas1,2,3 (AUTHOR) yalhadeethi@kau.edu.sa, Raffah, Bahaaudin M.1,2 (AUTHOR), Genovese, Alessandro4 (AUTHOR), Khayyat, Sondos4 (AUTHOR) sondos.khayyat@outlook.com, Sait, Roaa1 (AUTHOR), Umar, Ehtisham5 (AUTHOR), Iqbal, M. Waqas1,6 (AUTHOR) waqasiqbal48@gmail.com
Source: International Journal of Hydrogen Energy. Apr2026, Vol. 229, pN.PAG-N.PAG. 1p.
Subjects: Supercapacitors, Energy conversion, Hydrogen evolution reactions, Magnesium hydride, Nanocomposite materials, Metal-organic frameworks, Electrochemical analysis, Water electrolysis
Abstract: Nanostructured materials hybrid composites are cost-effective and versatile, making them innovative in electrical devices. HKUST-1 MOF offers a meticulously structured, conductive framework featuring accessible copper sites that enhance rapid ion transport and double-layer capacitance. The addition of MgH 2 induces chemical strain and localized electronic variations that reduce the overpotential for electrochemical water splitting. This composite inhibits the self-aggregation of nanoparticles in supercapacitor applications, consequently maintaining long-term cycle stability; concurrently, the hydride-MOF interface functions as a catalytic bridge that enhances effective proton reduction and hydrogen evolution reaction (HER). Through electrochemical studies, the catalyst demonstrated exceptional performance, with an impressive capacity of 1684 C/g at 1 A/g in a three-electrode setup. HKUST-1/MgH 2 //AC delivered 140 C/g at 1 A/g, with 80 Wh/kg energy density and 700 W/kg power density. Furthermore, the composite demonstrated excellent stability with a Coulombic efficiency of 95.1% and capacity retention of 86.8% after prolonged cycling. Faster HER kinetics are shown by the low overpotential (126.3 mV) and Tafel slope value (57.2 mV/dec) of the ideal catalyst, of HKUST-1/MgH 2. • HKUST-1/MgH2 was synthesized by a hydrothermal route for electrochemical applications. • The electrode delivered a high specific capacity of 1684 C g-1. • The device achieved 80 Wh kg-1 at a power density of 700 W kg-1. • It retained 86.8% capacity after 12,000 charge-discharge cycles. • The material showed HER activity with 126.3 mV overpotential and 57.2 mV dec-1 Tafel slope. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Nanostructured materials hybrid composites are cost-effective and versatile, making them innovative in electrical devices. HKUST-1 MOF offers a meticulously structured, conductive framework featuring accessible copper sites that enhance rapid ion transport and double-layer capacitance. The addition of MgH 2 induces chemical strain and localized electronic variations that reduce the overpotential for electrochemical water splitting. This composite inhibits the self-aggregation of nanoparticles in supercapacitor applications, consequently maintaining long-term cycle stability; concurrently, the hydride-MOF interface functions as a catalytic bridge that enhances effective proton reduction and hydrogen evolution reaction (HER). Through electrochemical studies, the catalyst demonstrated exceptional performance, with an impressive capacity of 1684 C/g at 1 A/g in a three-electrode setup. HKUST-1/MgH 2 //AC delivered 140 C/g at 1 A/g, with 80 Wh/kg energy density and 700 W/kg power density. Furthermore, the composite demonstrated excellent stability with a Coulombic efficiency of 95.1% and capacity retention of 86.8% after prolonged cycling. Faster HER kinetics are shown by the low overpotential (126.3 mV) and Tafel slope value (57.2 mV/dec) of the ideal catalyst, of HKUST-1/MgH 2. • HKUST-1/MgH2 was synthesized by a hydrothermal route for electrochemical applications. • The electrode delivered a high specific capacity of 1684 C g-1. • The device achieved 80 Wh kg-1 at a power density of 700 W kg-1. • It retained 86.8% capacity after 12,000 charge-discharge cycles. • The material showed HER activity with 126.3 mV overpotential and 57.2 mV dec-1 Tafel slope. [ABSTRACT FROM AUTHOR]
ISSN:03603199
DOI:10.1016/j.ijhydene.2026.154627