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Structural Exploration of Multilayered Ionic Liquid/Ag Electrode Interfaces by Atomic Force Microscopy and Surface‐Enhanced Raman Spectroscopy
Author(s) -
Zhang Meng,
Duan Sai,
Luo Siheng,
Zhong Yunxin,
Yan Jiawei,
Liu Guokun,
Mao Bingwei,
Tian Zhongqun
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202001294
Subject(s) - ionic liquid , raman spectroscopy , electrode , materials science , ionic bonding , spectroscopy , nanoparticle , surface enhanced raman spectroscopy , electrochemistry , analytical chemistry (journal) , nanotechnology , chemical physics , ion , chemical engineering , chemistry , raman scattering , optics , organic chemistry , physics , quantum mechanics , catalysis , engineering
Experimentally and theoretically exploring the detailed structure of ionic liquid/electrode interfaces is challenging. Progress has been made in understanding inner two‐dimensional ionic liquid/electrode interfaces. However, few studies have investigated the multilayer structure of the ionic liquid/electrode interface, which requires high spatial and chemical resolution. Here, using the interface structure of 1‐ethyl‐3‐methylimidazolium bis‐trifluoromethylsulfonyl imide (EMITFSI)/Ag (111) as a model system, its multilayer structure was revealed by in situ atomic force microscopy (AFM) and molecular dynamics simulations. The potential‐dependent interfacial orientations of the first and second EMITFSI layers were determined by electrochemical shell‐isolated nanoparticles‐enhanced Raman spectroscopy (SHINERS) on Ag(111) and surface‐enhanced Raman spectroscopy (SERS) on Ag nanoparticles. This work shows that a clear multilayer structure of ionic liquid/electrode interfaces can be explored by combining multiple techniques.