Multi-walled carbon nanotube integrated Ni–Co hydroxide/Cu2 (OH) 3NO3 heterostructures for efficient oxygen evolution in alkaline media
The development of sustainable and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is essential for efficient hydrogen (H₂) production. In this study, Cu2(OH)3NO3 (CuHN) and Ni-Co hydroxide/Cu2(OH)3NO3 (CuNiCo) electrocatalysts were synthesized using the reflux method. To further enhance the electrocatalytic properties, multi-walled carbon nanotubes (CNT) were integrated into CuNiCo with various weight fractions (x = 1.5, 2.5, 3.5 wt.%) to create composites (denoted as CuNiCo@CNT-1, 2, 3). Among these, CuNiCo@CNT-2 supported on nickel foam (NF) exhibited efficient OER activity, achieving low overpotentials (η) of 280 mV and 350 mV at current densities (J) of 50 and 100 mA/cm2 in 1M KOH. This enhanced performance is attributed to improved conductivity, increased active sites, and strong electronic coupling between CuNiCo and CNT. Moreover, the CuNiCo@CNT-2ǀǀPt/C@NF electrolyzer exhibited a low cell voltage of 1.49 V at 10 mA/cm2 and demonstrated excellent durability over 50 h at different current densities. These results highlight the strong potential of the CuNiCo@CNT composite as a cost-effective and robust electrocatalyst for practical water-splitting applications.
The development of sustainable and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is essential for efficient hydrogen (H₂) production. In this study, Cu2(OH)3NO3 (CuHN)…
Titanium carbide (Ti 3 C 2), a two-dimensional material known as MXene, is a promising electrode material for supercapacitors. Herein, MXene was synthesized by etching the Ti₃AlC₂ MAX phase,…
As a possible electrocatalyst, a two-dimensional heterostructure made up of a metal that conducts electricity very well and a metal oxide that conducts electricity has been discovered.