SERS studies of electrode/electrolyte interfacial water part II—librations of water correlated to hydrogen evolution reaction

Chen, Yan‐Xia; Zou, Shouzhong; Huang, Kaifang; Zhang, Tian

doi:10.1002/(sici)1097-4555(199808)29:8<749::aid-jrs285>3.0.co;2-2

Cited by 52 publications

(16 citation statements)

References 8 publications

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“…It must be also emphasized that the effect of AgCl or Cl ions originated from the electrochemical surface roughening process on the isotopic selectivity can be ignored in the present case. This is because that the residual AgCl or adsorbed Cl anions can be completely reduced and removed at more negative region than −0.9 V [37]. In addition, we have confirmed the no effect of deposited Pt particles which are dissolved from counter Pt and redeposited on working electrode via the energy dispersive X-ray spectrometry measurements (see SI).…”

Section: Resultssupporting

confidence: 71%

In-situ observation of isotopic hydrogen evolution reactions using electrochemical mass spectroscopy to evaluate surface morphological effect

Minamimoto

Osaka

Murakoshi

2019

Electrochimica Acta

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In the present article, the hydrogen evolution reaction in the mixed solution of H2O and D2O has been investigated on Pt and Ag electrodes via the electrochemical mass (ECmass) spectroscopy. In addition to the metal species dependence, we have confirmed the morphological effect of the electrode surface on the isotopic effect. By the establishment of the EC-mass system, we have successfully discussed about the formation of the active sites which accelerated the hydrogen generation at the surface of Ag by the surface roughening process. The present results prove the importance of in-situ mass spectroscopic measurement for the investigation to establish the arbitrary control of the isotopic hydrogen evolution reactions.

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Section: Resultssupporting

confidence: 71%

In-situ observation of isotopic hydrogen evolution reactions using electrochemical mass spectroscopy to evaluate surface morphological effect

Minamimoto

Osaka

Murakoshi

2019

Electrochimica Acta

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“…DMSO was found to form bidentate adsorption structure on gold via Au–O and Au–S bonds by other researchers through thermal desorption spectroscopy, X-ray photoelectron spectroscopy, and scanning transmission microscopy measurements. , Overall, DMSO molecules interact with a gold substrate through Au–O bonds and Au–S bonds. A broad band was also observed at 533 cm –1 , which may be due to [Au(OH) 2 ] − adsorbed on the gold substrate during preparation of the SERS substrate. , …”

Section: Resultsmentioning

confidence: 98%

Effect of Electrolyte Concentration on the Solvation Structure of Gold/LITFSI–DMSO Solution Interface

2020

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The use of high-concentration electrolytes in lithium metal batteries enables the effective suppression of lithium dendrite growth at the lithium anode. The issue of the solvation structure at the electrolyte/electrode interface in low-and high-concentration electrolytes must be addressed to understand the electroreduction stability and solid− electrolyte interphase (SEI) formation. The concentration-dependent solvation structure of lithium bis(trifluoromethanesulfonyl)imide (LITFSI)−dimethyl sulfoxide (DMSO) on a gold model electrode has been investigated with various electrolyte concentrations using surface-enhanced Raman spectroscopy. At low concentrations, free DMSO and TFSI − were found to be chemisorbed on the gold surface to form an adsorption layer. Among these, TFSI − was chemisorbed via its oxygen atoms based on the observation of the ν(Au−O) bond. Besides, chemisorbed TFSI − at the gold surface did not coordinate with Li + in the lowconcentration electrolyte. As the concentration gradually increased up to 2.31 M, chemisorbed TFSI − started to coordinate with Li + . On further increase in LITFSI concentration above 2.31 M, chemisorbed DMSO was absent in the adsorption layer; instead, chemisorbed TFSI − became the only species. The chemisorbed TFSI − is proposed to be coordinated with Li + by two of its oxygens in such high concentration, making its coordination saturated. The DMSO-free adsorption layer in electrolytes with concentration above 2.31 M might help to form a dense and uniform SEI once an electrical field is applied, which contributes to improve the long-term cyclability of batteries.

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“…21 Chen et al reported that this increase in intensity for water libration is related to the hydrogen evolution reaction. 31 They also pointed out that the increase can be attributed to the special interfacial structure of water molecules and suggested that water molecules form a structure different from that of liquid water at the electrode interface below potential zero charge. Further work is required to obtain a more exact picture of the dynamical behavior of the hydrogen evolution reaction.…”

Section: ¹1mentioning

confidence: 99%

In Situ Surface-enhanced Raman Analysis of Water Libration on Silver Electrode in Various Alkali Hydroxide Aqueous Solutions

et al. 2014

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Water libration on a silver electrode in various alkali hydroxides (MOH, M = Li, Na, K or Cs) aqueous solutions was examined through simultaneous experiments using surface-enhanced Raman scattering (SERS) and electrochemical analysis. This technique, referred to as SERS spectroelectrochemistry, reveals the Raman spectral band between 200 and 750 cm −1 , assignable to water libration on the electrode surface, through electrode potential scanning. The Raman intensity in this spectral band changes with the electrode potential. The variation in Raman intensity of water libration observed when scanning the electrode potential is discussed in terms of water molecules at the electrode interface in various alkali hydroxide aqueous solutions.

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SERS studies of electrode/electrolyte interfacial water part II—librations of water correlated to hydrogen evolution reaction

Cited by 52 publications

References 8 publications

In-situ observation of isotopic hydrogen evolution reactions using electrochemical mass spectroscopy to evaluate surface morphological effect

In-situ observation of isotopic hydrogen evolution reactions using electrochemical mass spectroscopy to evaluate surface morphological effect

Effect of Electrolyte Concentration on the Solvation Structure of Gold/LITFSI–DMSO Solution Interface

In Situ Surface-enhanced Raman Analysis of Water Libration on Silver Electrode in Various Alkali Hydroxide Aqueous Solutions

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