- Title
- Ultrathin 1T-MoS2 Nanoplates Induced by Quaternary Ammonium-Type Ionic Liquids on Polypyrrole/Graphene Oxide Nanosheets and Its Irreversible Crystal Phase Transition During Electrocatalytic Nitrogen Reduction
- Creator
- Mao, Hui; Fu, Yuanlin; Yang, Haoran; Deng, Zi-Zhao; Sun, Ying; Liu, Daliang; Wu, Qiong; Ma, Tianyi; Song, Xi-Ming
- Relation
- ACS Applied Materials & Interfaces Vol. 12, Issue 22, p. 25189-25199
- Publisher Link
- http://dx.doi.org/10.1021/acsami.0c05204
- Publisher
- American Chemical Society (ACS)
- Resource Type
- journal article
- Date
- 2020
- Description
- Ultrathin nanoplates of metastable 1T-MoS2 have been successfully stabilized and uniformly distributed on the surface of n-butyl triethyl ammonium bromide functionalized polypyrrole/graphene oxide (BTAB/PPy/GO) by a very simple hydrothermal method. BTAB as a typical kind of quaternary ammonium-type ionic liquids (ILs) played a crucial role in the formation of the obtained 1T-MoS2/BTAB/PPy/GO. It was covalently linked with PPy/GO and arranged in a highly ordered order at the solid–liquid interface of PPy/GO and H2O due to Coulombic interactions and other intermolecular interactions, which would induce and stabilize ultrathin 1T-MoS2 nanoplates by morphosynthesis. The good electrocatalytic activity toward nitrogen reduction reaction (NRR) with strong durability and good stability can be achieved by 1T-MoS2/BTAB/PPy/GO due to their excellent inorganic/organic hierarchical lamellar micro-/nanostructures. Especially, after the long-term electrocatalysis for NRR at a negative potential, metastable 1T-MoS2 as the catalytic center undergoes two types of irreversible crystal phase transition, which was converted to 1T′-MoS2 and Mo2N, caused by the competitive hydrogen evolution reaction (HER) process and the electrochemical reaction between the electroactive 1T-MoS2 and N2, respectively. The new N–Mo bonding prevents Mo atoms from binding to other N atoms in N2, resulting in the deactivation of the electrocatalysts to NRR after being used for 18 h. Even so, quaternary ammonium-type ILs would induce the crystal structures of transition-metal dichalcogenides (TMDCs), which might provide a new thought for the reasonable design of electrocatalysts based on TMDCs for electrocatalysis.
- Subject
- n-butyl triethyl ammonium bromide (BTAB); polypyrrole/graphene oxide (PPy/GO); 1T-MoS2; nitrogen reduction reaction (NRR); irreversible crystal phase transition; SDG 7; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1440967
- Identifier
- uon:41276
- Identifier
- ISSN:1944-8244
- Language
- eng
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