Stable 1T-MoS2 by Facile Phase Transition Synthesis for Efficient Electrocatalytic Oxygen Evolution Reaction

Ranjith Kumar Dharman; Hyeonae Im; Mrinal Kanti Kabiraz; Jeonghyeon Kim; Kiran P Shejale; Sang-Il Choi; Jeong Woo Han; Sung Yeol Kim

doi:10.1002/smtd.202301251

Stable 1T-MoS₂ by Facile Phase Transition Synthesis for Efficient Electrocatalytic Oxygen Evolution Reaction

Small Methods. 2024 Feb 2:e2301251. doi: 10.1002/smtd.202301251. Online ahead of print.

Authors

Ranjith Kumar Dharman¹, Hyeonae Im², Mrinal Kanti Kabiraz³, Jeonghyeon Kim³, Kiran P Shejale¹, Sang-Il Choi³, Jeong Woo Han⁴, Sung Yeol Kim¹

Affiliations

¹ School of Mechanical Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea.
² Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea.
³ Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu, 41566, Republic of Korea.
⁴ Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea.

PMID: 38308408
DOI: 10.1002/smtd.202301251

Abstract

The 1T phase of MoS₂ 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 MoS₂ . In this work, a simple hydrothermal-based synthesis method for the phase transition of MoS₂ is being developed. For this, the NH₂ -MIL-125(Ti) (Ti MOF) is successfully utilized to induce the phase transition of MoS₂ from 2H to 1T, achieving a high conversion ratio of ≈78.3%. The optimum phase-induced MoS₂ /Ti MOF heterostructure demonstrates enhanced oxygen evolution reaction (OER) performance, showing an overpotential of 290 mV at a current density of 10 mA cm^-2 . The density functional theory (DFT) calculations are demonstrating the benefits of this phase transition, determining the electronic properties and OER performance of MoS₂ .

Keywords: MoS2; electrocatalysts; metal-organic framework; oxygen evolution reaction; phase transition.

Abstract

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