Akademik Veri Yönetim Sistemi
ELECTROCHIMICA ACTA, cilt.543, 2025 (SCI-Expanded, Scopus)
Through a one-step electrodeposition strategy, Ni-enriched dual-phase CoS-NiS electrode materials were engineered as an economical candidate for Pt-based equivalents in DSSCs. This study demonstrates the successful realization of a dual-phase configuration within a single-layer film, eliminating the conventional reliance on composite architectures or heterostructure assembly. Increasing Ni content caused a phase transition from CoS to NiS/NiS2-rich structures and a distinct morphological evolution from compact micrograins to interconnected porous nanosheets. EIS analysis revealed a striking recovery in interfacial charge transport, and the chargetransfer resistance decreased from 11.79 S2 for pristine CoS to 7.15 S2 upon 20% Ni incorporation. Tafel polarization tests showed that the 20% Ni electrode had the lowest corrosion current density (2.37 mu Acm-2) and corrosion rate (51.19 mmyear-1), whereas the 40% Ni electrode exhibited unstable passivation with the highest corrosion rate (102.57 mmyear-1). These findings demonstrate that phase-engineered CoS-NiS electrodes, particularly those containing 20% Ni, combine economic fabrication with excellent electrochemical performance, making them a promising replacement for Pt-based counterparts.