121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-424
Subject Intercalation of Amines for More Metallic 1T'-MoS2 Nanosheets to Enhance the Catalytic Ability Toward Hydrogen Evolution
Authors Yeron Lee, Gabin Jung, Kwon Ik Seon, InHye Kwak, jeunghee park1,*
Micro Device Engineering / Microdevices, Korea University, Korea
1Department of Materials Chemistry, Korea University, Korea
Abstract Transition metal dichalcogenide (TMD) layered two-dimensional materials have recently become a research focus due to their fascinating properties and potentials in various applications. In particular, they are believed to be promising alternative catalysts to the expensive Pt for the hydrogen evolution reaction (HER). Excellent HER catalytic performance was observed for the metallic 1T or 1T' (distorted 1T) phase rather than the more stable semiconducting hexagonal (2H) phase. Herein, various amines (ethylenediamine, diethylenetriamine, Triethylenetetramine) are intercalated into 1T’ phase MoS2 nanosheets, synthesized by one-step hydrothermal reaction. More nitrogen atoms of amines induce more metallic to enhance the catalytic performance of hydrogen evolution reaction with a high stability. Triethylenetetramine intercalated MoS2 possess the highest HER activity with 10 mA cm-2 at −170 mV (vs. RHE) and Tafel slope of 36 mV dec-1.
E-mail yeronnn26@gmail.com