Probing Electric Field Distributions in the Double Layer of a Single-Crystal Electrode with Angstrom Spatial Resolution using Raman Spectroscopy

2020 ◽  
Vol 142 (27) ◽  
pp. 11698-11702
Author(s):  
Bao-Ying Wen ◽  
Jia-Sheng Lin ◽  
Yue-Jiao Zhang ◽  
Petar M. Radjenovic ◽  
Xia-Guang Zhang ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Electric Field ◽  
Single Crystal ◽  
Double Layer ◽  
Spatial Resolution ◽  
Field Distributions ◽  
Single Crystal Electrode

scholarly journals Electric field effect on BiFeO3 single crystal investigated by Raman spectroscopy

2007 ◽  
Vol 91 (7) ◽  
pp. 071910 ◽  
Author(s):  
M. Cazayous ◽  
D. Malka ◽  
D. Lebeugle ◽  
D. Colson
Keyword(s):  
Raman Spectroscopy ◽  
Electric Field ◽  
Single Crystal ◽  
Field Effect ◽  
Electric Field Effect

Extending the shell-isolated nanoparticle-enhanced Raman spectroscopy approach to interfacial ionic liquids at single crystal electrode surfaces

2014 ◽  
Vol 50 (94) ◽  
pp. 14740-14743 ◽  
Author(s):  
Meng Zhang ◽  
Li-Juan Yu ◽  
Yi-Fan Huang ◽  
Jia-Wei Yan ◽  
Guo-Kun Liu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Dft Calculations ◽  
Single Crystal ◽  
Electrode Surfaces ◽  
Structural Details ◽  
Single Crystal Electrode ◽  
First Time

We employ, for the first time, SHINERS to study single crystal electrode surfaces in ionic liquids, and combine DFT calculations to elucidate the structural details of imidazolium-based ionic liquid–Au single crystal electrode interfaces.

Shell-Isolated Nanoparticle-Enhanced Raman Spectroscopy at Single-Crystal Electrode Surfaces

2016 ◽  
Vol 4 (8) ◽  
pp. 1144-1158 ◽  
Author(s):  
Jin-Chao Dong ◽  
Rajapandiyan Panneerselvam ◽  
Ying Lin ◽  
Xiang-Dong Tian ◽  
Jian-Feng Li
Keyword(s):  
Raman Spectroscopy ◽  
Single Crystal ◽  
Electrode Surfaces ◽  
Single Crystal Electrode

Modeling the Electrical Double Layer to Understand the Reaction Environment in a CO2 Electrocatalytic System

2019 ◽  
Author(s):  
Divya Bohra ◽  
Jehanzeb Chaudhry ◽  
Thomas Burdyny ◽  
Evgeny Pidko ◽  
wilson smith
Keyword(s):  
Electric Field ◽  
Double Layer ◽  
Electrical Double Layer ◽  
Surface Reaction ◽  
Catalyst Surface ◽  
Local Reaction ◽  
Reaction Diffusion ◽  
Alkali Metal Cations ◽  
Applied Potential ◽  
Critical Aspect

<p>The environment of a CO<sub>2</sub> electroreduction (CO<sub>2</sub>ER) catalyst is intimately coupled with the surface reaction energetics and is therefore a critical aspect of the overall system performance. The immediate reaction environment of the electrocatalyst constitutes the electrical double layer (EDL) which extends a few nanometers into the electrolyte and screens the surface charge density. In this study, we resolve the species concentrations and potential profiles in the EDL of a CO<sub>2</sub>ER system by self-consistently solving the migration, diffusion and reaction phenomena using the generalized modified Poisson-Nernst-Planck (GMPNP) equations which include the effect of volume exclusion due to the solvated size of solution species. We demonstrate that the concentration of solvated cations builds at the outer Helmholtz plane (OHP) with increasing applied potential until the steric limit is reached. The formation of the EDL is expected to have important consequences for the transport of the CO<sub>2</sub> molecule to the catalyst surface. The electric field in the EDL diminishes the pH in the first 5 nm from the OHP, with an accumulation of protons and a concomitant depletion of hydroxide ions. This is a considerable departure from the results obtained using reaction-diffusion models where migration is ignored. Finally, we use the GMPNP model to compare the nature of the EDL for different alkali metal cations to show the effect of solvated size and polarization of water on the resultant electric field. Our results establish the significance of the EDL and electrostatic forces in defining the local reaction environment of CO<sub>2</sub> electrocatalysts.</p>

Submicron Simultaneous IR and Raman Spectroscopy (IR+Raman): Breakthrough Developments in Optical Photothermal IR (O-PTIR) Combined for Enhanced Failure Analysis

2019 ◽  
Author(s):  
Jay Anderson ◽  
Mustafa Kansiz ◽  
Michael Lo ◽  
Curtis Marcott
Keyword(s):  
Raman Spectroscopy ◽  
Failure Analysis ◽  
Data Quality ◽  
Raman Spectra ◽  
Spatial Resolution ◽  
Far Field ◽  
Field Mode ◽  
Microscopic Scale ◽  
Analytical Tools ◽  
Ir And Raman

Abstract Failure analysis of organics at the microscopic scale is an increasingly important requirement, with traditional analytical tools such as FTIR and Raman microscopy, having significant limitations in either spatial resolution or data quality. We introduce here a new method of obtaining Infrared microspectroscopic information, at the submicron level in reflection (far-field) mode, called Optical-Photothermal Infrared (O-PTIR) spectroscopy, that can also generate simultaneous Raman spectra, from the same spot, at the same time and with the same spatial resolution. This novel combination of these two correlative techniques can be considered to be complimentary and confirmatory, in which the IR confirms the Raman result and vice-versa, to yield more accurate and therefore more confident organic unknowns analysis.

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