Stable methylammonium-intercalated 1T′-MoS2 for efficient electrocatalytic hydrogen evolution. Issue 14 (21st March 2018)

• Record Type: Journal Article
• Authors: Kwak, In Hye; Kwon, Ik Seon; Abbas, Hafiz Ghulam; Jung, Gabin; Lee, Yeron; Park, Jeunghee; Kang, Hong Seok
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 14(2018)
• Page Start: 5613
• Page End: 5617
• Publication Date: 2018-03-21
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta00700d
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Methylammonium-intercalated 1T′-phase MoS2 layered structures exhibit excellent stability as well as high catalytic activity toward the hydrogen evolution reaction. Abstract : Two-dimensional layered structures have recently drawn worldwide attention because of their intriguing catalytic properties. Herein, we report 1T′-phase ammonium (A)- and methylammonium (MA)-intercalated MoS2 layered structures, synthesized by a one-step hydrothermal reaction. The MA-intercalated MoS2 exhibits excellent stability, as well as higher catalytic activity toward the hydrogen evolution reaction than the A-intercalated MoS2 . First-principles calculations were used to assess the relative stabilities of the 2H and 1T′ phases, showing a trend of 2H → 1T′ phase conversion with increasing concentrations of A or MA. The calculations consistently predicted a higher stability of the MA-intercalated complex, due to reduced repulsion between the positively charged MA moieties, which underlies the excellent catalytic performance.