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Ti-MXene/α-Ni(OH)2 Nanostructures as High-Performance Electrocatalyst for Oxygen Evolution Reaction
Mrunal Bhosale1, Sadhasivam Thangarasu1, Nagaraj Murugan2
1School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, Korea.
None:
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 Ti3C2Tx. The strong interconnection of Ni(OH)2 on Ti3C2Tx promotes synergistic effects and improves electron transfer properties alongside the intrinsic OER activity. The Ti3C2Tx-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 Ti3C2Tx-Ni(OH)2 electrocatalyst synergistically improve OER activity. The effective interaction between Ti3C2Tx and Ni(OH)2 in Ti3C2Tx-Ni(OH)2 improves stability during long-term operations. Moreover, a Ti3C2Tx-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 Ti3C2Tx can provide noteworthy water-splitting properties.
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