High-Capacitance Gold Nanoparticles from <i>Rhus coriaria</i>: Green Synthesis, Characterization and Electrochemical Evaluation for Supercapacitor Technologies
Makaleler > Tam Makale · 2026
Yazarlar: Mehmet Firat Baran, Elchin Huseynov, Azız EFTEKHARIMEHRABAD, Abdulkadir Levent, Erdal Ertas, Taras Kavetskyy, Ondrej Sausa, Evgeny Katz, Oleh Smutok
MICROMACHINES, SCI İndekslerine Giren Dergi, Uluslararası, Wos, 2026, cilt 17, ss 4583-4444444444
DOI: 10.3390/mi17010082
Özet
The structural and electrochemical properties of gold nanoparticles biosynthesized from Rhus coriaria L. (Rc@AuNPs) were comprehensively investigated and characterized. R. coriaria (sumac) served as a natural gold reducing and capping agent due to its rich polyphenolic and phytochemical composition, enabling the sustainable, low-cost, and environmentally friendly synthesis of Rc@AuNPs. The electrochemical behavior of the hybrid material was evaluated using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). Rc@AuNPs exhibited specific capacitances of 129.48 F/g, 156.32 F/g, and 280.37 F/g in H2SO4, Na2SO4, and KOH electrolytes, respectively, indicating strong potential for supercapacitor and energy-storage applications. GCD analysis further showed Csp values of 107.69 F/g (H2SO4), 133.23 F/g (Na2SO4), and 348.34 F/g (KOH), confirming the highest charge-storage performance in basic media. EIS measurements supported these results, yielding equivalent series resistance (ESR) values of 67.96 Omega in H2SO4, 64.42 Omega in Na2SO4, and a notably lower 24.43 Omega in KOH, consistent with its higher ionic conductivity and more efficient charge transfer. Overall, the superior Csp and low ESR observed in KOH demonstrate the excellent capacitive behavior of Rc@AuNPs. These biosynthesized gold nanoparticles represent a promising and sustainable electrode material for high-performance energy-storage technologies.