Surface-enhanced raman spectra of C2H2 and C2H4 adsorbed on silver colloid

Manzel, K.; Schulze, W.; Moskvits, M.

doi:10.1016/0009-2614(82)80328-x

Cited by 40 publications

(15 citation statements)

References 14 publications

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“…The similar difference between intensive SERS signals from ethylene and acetylene and total absence of RS signal for methane or ethane were observed as on silver films in a vacuum (see paper by Moskovits and DiLella in [27]) and for silver particles isolated in an argon matrix [198]. These facts were attributed to the existence of electromagnetic enhancement only in the first layer, i.e.…”

Section: Effect Of Adsorbate Nature On the Magnitude Of Enhancementsupporting

confidence: 75%

Adatom Hypothesis as a Predominant Mechanism of Surface Enhanced Raman Scattering: A Review of Experimental Argumentation

Lazorenko-Manevich¹

2005

Russ J Electrochem

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A contemporary review of research concerning the mechanism of surface enhanced Raman scattering (SERS) is presented and it is stated that this problem is yet to be solved. The necessity to yet once again analyze some of the familiar experimental observations and the deep-rooted beliefs and revise quantitative evaluations of SERS enhancement via major mechanisms (electromagnetic and chemical) with allowance made for most important experimental characteristics of SERS is substantiated. The characteristics are enumerated and the role they play in the above evaluations is sketched. Attention is focused mainly on electrochemical aspects of SERS problem, which to a large extent define the content and salient features of SERS and provide basic experimental justification for the so-called adatom hypothesis.

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Section: Effect Of Adsorbate Nature On the Magnitude Of Enhancementsupporting

confidence: 75%

Adatom Hypothesis as a Predominant Mechanism of Surface Enhanced Raman Scattering: A Review of Experimental Argumentation

Lazorenko-Manevich¹

2005

Russ J Electrochem

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“…For the Ni(SA)/Au@SiO 2 sample, the Raman band at 1950 cm À 1 can be attributed to physisorbed acetylene. [58,59] Next to that, as shown in Figure 3c, a Raman peak was observed at~1890 cm À 1 , which has to the best of our knowledge not been reported in literature. Alongside this peak arises a relatively sharp Raman peak in the metal-adsorbate stretching region, at~411 cm À 1 , that we attribute to NiÀ C(�C) stretching in relation to (NiÀ )C�C stretching at~1890 cm À 1 .…”

Section: In Situ Shiners Probe Molecules Adsorption and Acetylene Hydsupporting

confidence: 52%

“…For the Ni(SA)/Au@SiO 2 sample, the Raman band at ∼1950 cm −1 can be attributed to physisorbed acetylene . Next to that, as shown in Figure c, a Raman peak was observed at ∼1890 cm −1 , which has to the best of our knowledge not been reported in literature.…”

Section: Resultsmentioning

confidence: 99%

In SituShell‐Isolated Nanoparticle‐Enhanced Raman Spectroscopy of Nickel‐Catalyzed Hydrogenation Reactions

et al. 2020

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Synthesis methods to prepare lower transition metal catalysts and specifically Ni for Shell‐Isolated Nanoparticle‐Enhanced Raman Spectroscopy (SHINERS) are explored. Impregnation, colloidal deposition, and spark ablation have been investigated as suitable synthesis routes to prepare SHINERS‐active Ni/Au@SiO2 catalyst/Shell‐Isolated Nanoparticles (SHINs). Ni precursors are confirmed to be notoriously difficult to reduce and the temperatures required are generally harsh enough to destroy SHINs, rendering SHINERS experiments on Ni infeasible using this approach. For colloidally synthesized Ni nanoparticles deposited on Au@SiO2 SHINs, stabilizing ligands first need to be removed before application is possible in catalysis. The required procedure results in transformation of the metallic Ni core to a fully oxidized metal nanoparticle, again too challenging to reduce at temperatures still compatible with SHINs. Finally, by use of spark ablation we were able to prepare metallic Ni catalysts directly on Au@SiO2 SHINs deposited on a Si wafer. These Ni/Au@SiO2 catalyst/SHINs were subsequently successfully probed with several molecules (i. e. CO and acetylene) of interest for heterogeneous catalysis, and we show that they could be used to study the in situ hydrogenation of acetylene. We observe the interaction of acetylene with the Ni surface. This study further illustrates the true potential of SHINERS by opening the door to studying industrially relevant reactions under in situ or operando reaction conditions.

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“…4c, in comparison with that of SA-Ni-NC under open circuit potential (OCP), a new Raman peak representing the n(C^C) stretching vibration appeared at 1961 cm À1 at 0 V under acetylene ow, verifying acetylene adsorption on SA-Ni-NC. 33,34 When the potential increased from 0 to À0.6 V, the n(C]C) stretching vibration of p-bound ethylene gradually emerged at 1546 cm À1 . [34][35][36][37] Weak p-adsorption of ethylene is benecial for ethylene desorption, eventually facilitating acetylene semi- hydrogenation kinetics.…”

Section: Resultsmentioning

confidence: 99%

“…33,34 When the potential increased from 0 to À0.6 V, the n(C]C) stretching vibration of p-bound ethylene gradually emerged at 1546 cm À1 . [34][35][36][37] Weak p-adsorption of ethylene is benecial for ethylene desorption, eventually facilitating acetylene semi- hydrogenation kinetics. As illustrated by the DFT simulations in Fig.…”

Section: Resultsmentioning

confidence: 99%

π-Adsorption promoted electrocatalytic acetylene semihydrogenation on single-atom Ni dispersed N-doped carbon

Chen

et al. 2022

J. Mater. Chem. A

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Surface-enhanced raman spectra of C2H2 and C2H4 adsorbed on silver colloid

Cited by 40 publications

References 14 publications

Adatom Hypothesis as a Predominant Mechanism of Surface Enhanced Raman Scattering: A Review of Experimental Argumentation

Adatom Hypothesis as a Predominant Mechanism of Surface Enhanced Raman Scattering: A Review of Experimental Argumentation

In SituShell‐Isolated Nanoparticle‐Enhanced Raman Spectroscopy of Nickel‐Catalyzed Hydrogenation Reactions

π-Adsorption promoted electrocatalytic acetylene semihydrogenation on single-atom Ni dispersed N-doped carbon

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