Ref.: MmePr15-001

Preparation of nanoporous Cu-Zn-Ni-Co alloys in ionic liquid and deep-eutectic solvent by electrodeposition and dealloying application as electrocatalysts for water reduction

Apresentador: Mireille Turmine

Autores (Instituição): Xie, Y.(Sorbonne Université); Vivier, V.(Sorbonne Université); Turmine, M.(Sorbonne Université);

Resumo:
In recent years, research into the preparation of electrocatalysts has gained considerable interest, with more effective catalysts being studied in depth, particularly for water electrolysis. Although precious metals possess exemplary properties for water splitting, their limited natural reserves and elevated prices render their extensive utilization unavoidable. The preparation of highly efficient electrocatalysts based on transition metal alloys is a significant challenge that must be overcome. In this work, we focus on the preparation of nanoporous Cu-Zn-Ni-Co alloys prepared by two-step electrodeposition process in ethylammonium nitrate (EAN), a protic ionic liquid, and ethaline, a deep eutectic solvent (DES), followed by dealloying. In the first step, Cobalt is deposited on copper in pure EAN. Next, Zinc and Nickel are co-electrodeposited in ethaline, generating a Cu-Zn-Ni-Co alloy after further heat treatment. Our novel approach to preparing nanoporous Cu-Zn-Ni-Co alloys via electrodeposition in ionic media, followed by dealloying, is an efficacious methodology with significant implications for practical applications in electrocatalysis, including water splitting.