Surface Raman characterization of cinchonidine-modified polycrystalline platinum in ethanol: effects of temperature and comparison with 10,11-dihydrocinchonidine

LeBlanc, Rene J; Williams, Christopher T.

doi:10.1016/j.molcata.2004.05.027

Cited by 19 publications

(13 citation statements)

References 34 publications

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“…7 and 9). Furthermore, from a methodology point of view, it is believed that experimental approaches such as transient gas-switching [30,34], solvent-switching [32], temperaturechanging [59], and modifier-displacement [60] can provide more versatility in in situ spectroscopic studies of liquid-solid interfaces.…”

Section: Implications To Heterogeneous Liquid-phase Catalysis and Appmentioning

confidence: 99%

Solvent effect on CO oxidation as a novel diagnosing tool to pin down low-coverage CO at the liquid–solid interface: An in situ infrared study

2006

Journal of Colloid and Interface Science

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Section: Implications To Heterogeneous Liquid-phase Catalysis and Appmentioning

confidence: 99%

Solvent effect on CO oxidation as a novel diagnosing tool to pin down low-coverage CO at the liquid–solid interface: An in situ infrared study

2006

Journal of Colloid and Interface Science

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“…The Surface Enhanced Raman Spectroscopy (SERS) is a useful tool to get the fingerprint of the studied compounds [4,5], to obtain information about the orientation of adsorbed molecules [6][7][8][9][10], the changes in their chemical bonds [11,12], and the formation of new chemical bonds between the adsorbed molecules and the metal surface [13,14]. Our aim was to get information about the adsorption geometry (tilted or flat) of a series of phenylpyruvates by means of SERS method using silver sol.…”

Section: Introductionmentioning

confidence: 99%

Surface enhanced Raman spectroscopic (SERS) behavior of phenylpyruvates used in heterogeneous catalytic asymmetric cascade reaction

Tálas

Szőllősi

Kristyán

et al. 2021

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Nitrophenylpyruvates were investigated in heterogeneous catalytic cascade reaction. The strength and geometry of their adsorption on Ag surface were studied by SERS. The enol form is predominant in solid and methanolic solutions of phenylpyruvates. SERS and calculations evidenced the adsorption through oxygen in acidic media. NO2 is not involved in the adsorption: lack of indole formation has been explained.

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“…The G band intensity behavior needs to be considered with relative care due to the presence of a shoulder at 1,587 cm −1 . This shoulder is probably due to (C=C) vibration [45], which could be related to intermediates of ethanol oxidation. Above 0.35 V, this shoulder collapses into the G-band position, and the reported intensity behavior is a superposition of these two species.…”

Section: "In Situ" Raman Resultsmentioning

confidence: 97%

“…In addition to the above-cited vibrational bands, spectrum III presented two characteristic bands of ethanol at 882 and 1,456 cm −1 (ν s (C-C-O) [44,45] and δ (C-O-H) [42,45], respectively) and three remaining tiny bands at 1,051, 1,095, and 1,276 cm −1 , associated with ν a (C-C-O) [45], γ (C-O-H) [44,45], and t (CH 2 )+δ (C-O-H) [44][45][46], respectively.…”

Section: Characterization Of Pt/c Eletrocatalystsmentioning

confidence: 91%

Ethanol Electro-oxidation on Pt/C Electrocatalysts: An “In Situ” Raman Spectroelectrochemical Study

et al. 2011

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This work presents an "in situ" spectroelectrochemical study of the ethanol oxidation reaction on Pt/C electrocatalysts prepared by the polymeric precursor method. Characterization of the electrocatalysts was performed with X-ray diffraction, Raman spectroscopy, and cyclic voltammetry measurements. The average crystallite size was estimated as 7 nm, in agreement with the value reported in the literature for these types of electrocatalysts. The cyclic voltammetry characterization in an acidic medium presented the expected voltammetric behavior for polycrystalline Pt/C. The ethanol oxidation process was successfully employed "in situ", making use of an optical probe for excitation and collection of the Raman scattering signal. In this configuration it was possible to track the formation of the main products-CO, CO 2 indirectly, acetaldehyde, and acetic acid-and to measure the decay of the ethanol concentration. The results indicate that the optical probe-based Raman spectroscopy technique is a very effective tool for studying "in situ" electrochemical oxidation reactions of ethanol. It might also be a very promising characterization technique for studies of the "in situ" electrochemical oxidation of small organic molecules.

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Surface Raman characterization of cinchonidine-modified polycrystalline platinum in ethanol: effects of temperature and comparison with 10,11-dihydrocinchonidine

Cited by 19 publications

References 34 publications

Solvent effect on CO oxidation as a novel diagnosing tool to pin down low-coverage CO at the liquid–solid interface: An in situ infrared study

Solvent effect on CO oxidation as a novel diagnosing tool to pin down low-coverage CO at the liquid–solid interface: An in situ infrared study

Surface enhanced Raman spectroscopic (SERS) behavior of phenylpyruvates used in heterogeneous catalytic asymmetric cascade reaction

Ethanol Electro-oxidation on Pt/C Electrocatalysts: An “In Situ” Raman Spectroelectrochemical Study

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