Decorating soft electrified interfaces: From molecular assemblies to nano-objects

Półtorak, Łukasz; Gamero‐Quijano, Alonso; Herzog, Grégoire; Walcarius, Alain

doi:10.1016/j.apmt.2017.10.001

Cited by 36 publications

(28 citation statements)

References 214 publications

(264 reference statements)

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“…Furthermore, redox photoelectrocatalysis of the water oxidation reaction (WOR) has been achieved by immobilization of BiVO 4 semiconductor NPs at the ITIES. 158 These burgeoning areas of redox (photo)electrocatalysis of energy-related reactions by ITIES functionalized with nanomaterials (beyond gold nanofilms) are very exciting current avenues of research and as such have been the subject of two recent comprehensive reviews by Peljo et al 125 and Poltorak et al 71 NP superlattices formed at solid−liquid interfaces can be utilized for electrocatalysis as well as for heterogeneous catalysis, as reviewed by Boles et al 33 and by Henry. 218 For example, Au nanocrystals were found to be highly active for oxidation of CO when assembled on metal oxide surfaces, 219 most likely due to the contact electrification.…”

Section: Redox Electrocatalysismentioning

confidence: 99%

Gold Nanofilms at Liquid–Liquid Interfaces: An Emerging Platform for Redox Electrocatalysis, Nanoplasmonic Sensors, and Electrovariable Optics

et al. 2018

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The functionality of liquid-liquid interfaces formed between two immiscible electrolyte solutions (ITIES) can be markedly enhanced by modification with supramolecular assemblies or solid nanomaterials. The focus of this Review is recent progress involving ITIES modified with floating assemblies of gold nanoparticles or "nanofilms". Experimental methods to controllably modify liquid-liquid interfaces with gold nanofilms are detailed. Also, we outline an array of techniques to characterize these gold nanofilms in terms of their physiochemical properties (such as reflectivity, conductivity, catalytic activity, or plasmonic properties) and physical interfacial properties (for example, interparticle spacing and immersion depth at the interface). The ability of floating gold nanofilms to impact a diverse range of fields is demonstrated: in particular, redox electrocatalysis, surface-enhanced Raman spectroscopy (SERS) or surface plasmon resonance (SPR) based sensors, and electrovariable optical devices. Finally, perspectives on applications beyond the state-of-the-art are provided.

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Section: Redox Electrocatalysismentioning

confidence: 99%

Gold Nanofilms at Liquid–Liquid Interfaces: An Emerging Platform for Redox Electrocatalysis, Nanoplasmonic Sensors, and Electrovariable Optics

et al. 2018

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“…The interface formed between two immiscible electrolyte solutions (ITIES) is a highly reproducible, defect-free surface that allows the assembly of a large variety of nanoscale objects [1][2][3][4]. The adsorption of nano-objects at a liquid-liquid interface is governed by their dimensions, the organic-aqueous interfacial tension and the wettability of the material [2,[5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Ion transfer at polarised liquid-liquid interfaces modified with adsorbed silica nanoparticles

Collins

Hébrant

Herzog

2018

Electrochimica Acta

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The interface between two immiscible electrolyte solutions (ITIES) can act as a scaffold for the assembly of nanometer-sized objects. Here we followed the adsorption of silica nanoparticles of 12 nm diameter at the ITIES by AC voltammetry and their interactions with methylene blue (MB +), selected as a model ion, by cyclic voltammetry and UV-vis absorption spectroscopy. We determined the association constant, , of adsorption of MB + onto silica nanoparticles to be 1.66 10 5 , which indicated a strong affinity between them. This strong affinity shifted the Gibbs free energy of transfer by-8.9 kJ mol-1. This is in contrast with the other two ions investigated (Eosin B and tetraethylammonium), which demonstrated low affinity for the silica nanoparticles. By combining the ability of silica to adsorb onto the ITIES and their affinity for MB + , we were able to accumulate MB + at the ITIES.

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“…The hydrogen evolution rate can also be enhanced by functionalization of the liquid-liquidi nterface with solid catalysts. [32][33][34] The formal redoxp otentials of metallocenes in DCE solventa re summarized in Figure 2. Some scatteredw orks have also proposed the utilization of as ingle molecule to achievet he complex photocatalytic H 2 evolution process.…”

Section: Introductionmentioning

confidence: 99%

“…Thereafter, both osmocene ([Cp 2 Os II ], Cp=C 5 H 5 ) and decamethylosmocene ([Cp* 2 Os II ]) proved their capability to produce H 2 on light irradiation. The hydrogen evolution rate can also be enhanced by functionalization of the liquid–liquid interface with solid catalysts . The formal redox potentials of metallocenes in DCE solvent are summarized in Figure .…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Study on the Photogeneration of Hydrogen by Decamethylruthenocene

Rivier

Peljo

Maye

et al. 2019

Chemistry A European J

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Detailed studies on hydrogen evolution by decamethylruthenocene ([Cp* 2 Ru II ]) highlighted that metallocenes are capable of photoreducing hydrogen without the need for an additionals ensitizer.E lectrochemical, gas chromatographic, and spectroscopic (UV/Vis, 1 Ha nd 13 CNMR) measurements corroborated by DFTc alculations indicated that the production of hydrogen occurs by at wo-stepp rocess. First, decamethylruthenocene hydride [Cp* 2 Ru IV (H)] + is formed in the presence of an organic acid. Subsequently, [Cp* 2 Ru IV (H)] + is reversibly reduced in ah eterolytic reaction with one-photon excitation leadingt oafirst releaseo fh y-drogen. Thereafter,t he resultant decamethylruthenocenium ion [Cp* 2 Ru III ] + is further reduced with as econd releaseo f hydrogenb yd eprotonation of am ethyl group of [Cp* 2 Ru III ] + .E xperimental and computational data show spontaneous conversion of [Cp* 2 Ru II ]t o[ Cp* 2 Ru IV (H)] + in the presence of protons. Calculations highlight that the first reductioni se ndergonic (DG 0 = 108 kJ mol À1 )a nd needs an input of energy by light for the reactiont oo ccur.T he hydricityo ft he methylp rotons of [Cp* 2 Ru II ]w as also considered.Supporting information and the ORCID identification number(s) for the author(s) of this articlecan be found under: https://doi.

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Decorating soft electrified interfaces: From molecular assemblies to nano-objects

Cited by 36 publications

References 214 publications

Gold Nanofilms at Liquid–Liquid Interfaces: An Emerging Platform for Redox Electrocatalysis, Nanoplasmonic Sensors, and Electrovariable Optics

Gold Nanofilms at Liquid–Liquid Interfaces: An Emerging Platform for Redox Electrocatalysis, Nanoplasmonic Sensors, and Electrovariable Optics

Ion transfer at polarised liquid-liquid interfaces modified with adsorbed silica nanoparticles

Mechanistic Study on the Photogeneration of Hydrogen by Decamethylruthenocene

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