Stable methylammonium-intercalated 1T′-MoS2 for efficient electrocatalytic hydrogen evolution

被引：40

作者：

Kwak, In Hye ^{[1
]}

Kwon, Ik Seon ^{[1
]}

Abbas, Hafiz Ghulam ^{[2
]}

Jung, Gabin ^{[1
]}

Lee, Yeron ^{[1
]}

Park, Jeunghee ^{[1
]}

Kang, Hong Seok ^{[3
]}

机构：

[1] Korea Univ, Dept Chem, Sejong 339700, South Korea

[2] Jeonbuk Natl Univ, Dept Nanosci & Nanotechnol, Chonju 560756, Chonbuk, South Korea

[3] Jeonju Univ, Dept Nano & Adv Mat, Chonju 560756, Chonbuk, South Korea

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2018年 / 6卷 / 14期

关键词：

PHASE-TRANSITION; MOS2; NANOSHEETS; MOLYBDENUM-DISULFIDE; CATALYTIC-ACTIVITY; CHEMISTRY; 1T-MOS2;

D O I：

10.1039/c8ta00700d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：5613 / 5617

页数：5