Publication date: 15th December 2025
Advancing electrochemical technologies toward CRM-independent operation requires synthesis routes that offer precise compositional control while remaining scalable and cost-effective. Electrodeposition provides such a route: Its rapidly iterative and highly reconfigurable nature allows deliberate tuning of metal ratios and microstructure, establishing a framework that improves materials utilization regardless of how far a system has progressed toward CRM independence.
Electrodeposition has been widely applied to create coatings, metal oxides, alloys, semiconductor materials, and both mono and multi-metallic nanomaterials in aqueous and non-aqueous media. This project explores the benefits of electrodepositing OER-relevant bimetallic thin films from both solution classes, followed by conversion to oxide films through thermal oxidation in oxygen. Aqueous media offer simpler preparation, a more mature knowledge base, and fast kinetics enabled by high conductivity and low viscosity. Deep eutectic solvents (DES), in contrast, can widen the accessible potential range by mitigating practical limits associated with solvent reduction, enabling operation above 100 °C, and providing slower deposition kinetics that may favor controlled nucleation, crystal growth, and microstructural refinement.
By systematically varying current density, metal-ion concentration, electrolyte temperature, and oxidation temperature, the project aims to map how processing conditions govern film composition, morphology, and electrochemical performance. Films are assessed by compositional analysis (ICP), surface and elemental mapping (SEM/EDS), and electrochemical testing (e.g., CV-based activity and stability screening).
Ultimately, this work positions electrodeposition as a low-energy, scalable route to high-quality, high-performing thin-film catalysts, using abundant precursors and a pace few synthesis methods can match.
This capability highlights the technique's potential in accelerating discovery and supporting the transition away from CRM-intensive catalysts, while remaining scalable enough to offer a practical pathway toward future deployment.
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