Abstract
Cobalt-based spinel oxides are promising candidates for oxygen evolution reaction (OER), however their limited electrical conductivity and low crystal stability may hinder further improvement. This report indroduces CuCo 2 O 4 nanoparticles/Ti 3 C 2 T x /nickel foam (NF) hybrid electrocatalyst as a robust electrode for OER, where the presence of the Ti 3 C 2 T x MXene structure could enhance the electrical conductivity of the electrocatalysts. The ultra-thin hybrid structure with large surface area can effectively increase the number of electrochemically active sites and enhance the electrocatalytic performance. Experimental findings indicated that CuCo 2 O 4 /Ti 3 C 2 T x hybrid structure on NF shows superior improved OER electrocatalytic activity compared to pristine Ti 3 C 2 T x . Accordingly, hybrid elecrocatalyst not only showed a low overpotential of 1.67 V at 100 mA.cm 2 , and a small Tafel slope of 49 mV dec −1 , but also exhebited an outstanding long-term durability. • CuCo 2 O 4 /GC, Ti 3 C 2 T x /GC, CuCo 2 O 4 / Ti 3 C 2 T x /GC, CuCo 2 O 4 / Ti 3 C 2 T x /NF hybrid electrocatalysts were synthesized by a facile solvothermal method. • Presence of the Ti 3 C 2 T x MXene structure enhanced the electrical conductivity of the electrocatalysts. • CuCo 2 O 4 / Ti 3 C 2 T x /NF exhibited excellent electrocatalytic activity for Oxygen evolution reaction for water splitting.
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