Ti-MXene/α-Ni(OH) Nanostructures as High-Performance Electrocatalyst for Oxygen Evolution Reaction.

Herein, the strategy of homogenous inclusion of nanoparticles within the surface and interlayers of 2D MXenes is established to achieve effective oxygen evolution reaction (OER) performance. A greater quantity of nano-sized Ni(OH) particles is uniformly anchored on multilayered accordion-like nanosheets of TiCT. The strong interconnection of Ni(OH) on TiCT promotes synergistic effects and improves electron transfer properties alongside the intrinsic OER activity. The TiCT-Ni(OH)-4 demonstrates remarkable OER activity by exhibiting a lower overpotential (235.54 mV at 10 mA cm) in alkaline conditions. Increased electrochemical active surface area (2.925 mF cm), lower charge transfer resistance, lowering the reaction barrier, and stabilizing/converting essential intermediates via the TiCT-Ni(OH) electrocatalyst synergistically improve OER activity. The effective interaction between TiCT and Ni(OH) in TiCT-Ni(OH) improves stability during long-term operations. Moreover, a TiCT-Ni(OH)-4||Pt/C cell has 1.7V at 10 mA cm . It can be deduced that the usage of Ni(OH) as an electrocatalyst together with TiCT can provide noteworthy water-splitting properties.