Ti‐MXene/α‐Ni(OH)<sub>2</sub> Nanostructures as High‐Performance Electrocatalyst for Oxygen Evolution Reaction
Mrunal Bhosale, Sadhasivam Thangarasu, Nagaraj Murugan, Yoong Ahm Kim, Tae-Hwan Oh
Abstract
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) 2 particles is uniformly anchored on multilayered accordion‐like nanosheets of Ti 3 C 2 T x . The strong interconnection of Ni(OH) 2 on Ti 3 C 2 T x promotes synergistic effects and improves electron transfer properties alongside the intrinsic OER activity. The Ti 3 C 2 T x ‐Ni(OH) 2 ‐4 demonstrates remarkable OER activity by exhibiting a lower overpotential (235.54 mV at 10 mA cm −2 ) in alkaline conditions. Increased electrochemical active surface area (2.925 mF cm −2 ), lower charge transfer resistance, lowering the reaction barrier, and stabilizing/converting essential intermediates via the Ti 3 C 2 T x ‐Ni(OH) 2 electrocatalyst synergistically improve OER activity. The effective interaction between Ti 3 C 2 T x and Ni(OH) 2 in Ti 3 C 2 T x ‐Ni(OH) 2 improves stability during long‐term operations. Moreover, a Ti 3 C 2 T x ‐Ni(OH) 2 ‐4||Pt/C cell has 1.7V at 10 mA cm −1 . It can be deduced that the usage of Ni(OH) 2 as an electrocatalyst together with Ti 3 C 2 T x can provide noteworthy water‐splitting properties.