Dharman Ranjith Kumar, Im Hyeonae, Kabiraz Mrinal Kanti, Kim Jeonghyeon, Shejale Kiran P, Choi Sang-Il, Han Jeong Woo, Kim Sung Yeol
School of Mechanical Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea.
Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea.
Small Methods. 2024 Jul;8(7):e2301251. doi: 10.1002/smtd.202301251. Epub 2024 Feb 2.
The 1T phase of MoS exhibits much higher electrocatalytic activity and better stability than the 2H phase. However, the harsh conditions of 1T phase synthesis remain a significant challenge for various extensions and applications of MoS. In this work, a simple hydrothermal-based synthesis method for the phase transition of MoS is being developed. For this, the NH-MIL-125(Ti) (Ti MOF) is successfully utilized to induce the phase transition of MoS from 2H to 1T, achieving a high conversion ratio of ≈78.3%. The optimum phase-induced MoS/Ti MOF heterostructure demonstrates enhanced oxygen evolution reaction (OER) performance, showing an overpotential of 290 mV at a current density of 10 mA cm. The density functional theory (DFT) calculations are demonstrating the benefits of this phase transition, determining the electronic properties and OER performance of MoS.
MoS的1T相表现出比2H相更高的电催化活性和更好的稳定性。然而，1T相合成的苛刻条件仍然是MoS各种扩展和应用的重大挑战。在这项工作中，正在开发一种基于水热的简单合成方法用于MoS的相变。为此，成功利用NH-MIL-125(Ti)（Ti MOF）诱导MoS从2H相转变为1T相，实现了约78.3%的高转化率。最佳的相诱导MoS/Ti MOF异质结构表现出增强的析氧反应（OER）性能，在电流密度为10 mA cm时过电位为290 mV。密度泛函理论（DFT）计算证明了这种相变的益处，确定了MoS的电子性质和OER性能。
