Oxygen reduction by decamethylferrocene at liquid/liquid interfaces catalyzed by dodecylaniline

Su, Bin; Hatay, İmren; Li, Fēi; Partovi‐Nia, Raheleh; Méndez, Manuel A.; Samec, Zdeněk; Ersöz, Mustafa

doi:10.1016/j.jelechem.2009.11.029

Cited by 39 publications

(48 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, as detailed by Koper, the first step of the mechanism under these conditions in the presence of gold is considered to be ET (from DMFc in our case) to O 2 forming the superoxide at the surface of the gold substrate [49][50][51]. However, the production of superoxide in the organic phase is very difficult from a thermodynamic point of view: the standard redox potential for O 2 -in water is -0.330 V vs. SHE, whereas the value in DCE, for example, becomes -0.81 V vs. SHE, as calculated by Su [9]. The latter value should be of the same order in TFT.…”

Section: Interfacial Redox Catalysismentioning

confidence: 70%

“…The IT step can be catalysed by the presence of various aniline derivatives [9,30] and free-base-or metalloporphyrins [44,45], porphines [42] or phthalocyanines [31] in the organic phase and the desired reduction product (H 2 O versus H 2 O 2 ) can be favoured by interfacial assemblies of cobalt porphyrins [12,32,33] or choice of electron donor [10]. Recently, biphasic O 2 reduction has been achieved under neutral and alkaline conditions [17].…”

Section: Biphasic O 2 Reduction By the Ion Transfer -Electron Transfementioning

confidence: 99%

“…If we assume that a w = a o = 0.5, and because the total number of electrons in the aqueous and organic reactions are n w = 2 and n o = 1, E NP F can be estimated from equation (9). In addition, the active area available for electrochemical reactions can be considered as the projected area available for diffusion.…”

Section: Mechanism Of Biphasic O 2 Reduction By Interfacial Redox Catmentioning

confidence: 99%

“…A burgeoning area of research is concerned with the biphasic electrocatalysis of redox reactions of interest for energy research, including the oxygen (O 2 ) reduction reaction (ORR) [9][10][11][12][13][14][15][16][17][18][19] and the hydrogen (H 2 ) evolution reaction (HER) [20][21][22][23][24][25][26][27][28], using soft interfaces functionalized with molecular species, metallic NPs or inorganic non-precious metal-based materials. The use of adsorbed solid particulate electrocatalysts at electrochemically polarisable soft interfaces has recently been reviewed by Dryfe and co-workers [29].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Gold Nanofilm Redox Catalysis for Oxygen Reduction at Soft Interfaces

Smirnov

Peljo

Scanlon

et al. 2016

Electrochimica Acta

Self Cite

View full text Add to dashboard Cite

A B S T R A C TFunctionalization of a soft or liquid-liquid interface by a one gold nanoparticle thick "nanofilm" provides a conductive pathway to facilitate interfacial electron transfer from a lipophilic electron donor to a hydrophilic electron acceptor in a process known as interfacial redox catalysis. The gold nanoparticles in the nanofilm are charged by Fermi level equilibration with the lipophilic electron donor and act as an interfacial reservoir of electrons. Additional thermodynamic driving force can be provided by electrochemically polarising the interface. Using these principles, the biphasic reduction of oxygen by a lipophilic electron donor, decamethylferrocene, dissolved in a,a,a-trifluorotoluene was catalysed at a gold nanoparticle nanofilm modified water-oil interface. A recently developed microinjection technique was utilised to modify the interface reproducibly with the mirror-like gold nanoparticle nanofilm, while the oxidised electron donor species and the reduction product, hydrogen peroxide, were detected by ion transfer voltammetry and UV/vis spectroscopy, respectively. Metallization of the soft interface allowed the biphasic oxygen reduction reaction to proceed via an alternative mechanism with enhanced kinetics and at a significantly lower overpotential in comparison to a bare soft interface. Weaker lipophilic reductants, such as ferrocene, were capable of charging the interfacial gold nanoparticle nanofilm but did not have sufficient thermodynamic driving force to significantly elicit biphasic oxygen reduction.

show abstract

Section: Interfacial Redox Catalysismentioning

confidence: 70%

Section: Biphasic O 2 Reduction By the Ion Transfer -Electron Transfementioning

confidence: 99%

Section: Mechanism Of Biphasic O 2 Reduction By Interfacial Redox Catmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gold Nanofilm Redox Catalysis for Oxygen Reduction at Soft Interfaces

Smirnov

Peljo

Scanlon

et al. 2016

Electrochimica Acta

Self Cite

View full text Add to dashboard Cite

show abstract

“…The protonation of DMFc can be facilitated by the use of organic bases such as dodecylaniline 11 as illustrated in Fig. 9, suggesting that the rate-limiting step is the formation of [DMFc-H] + .…”

Section: Hydrogen Evolution By Pcetmentioning

confidence: 99%

Molecular electrocatalysis at soft interfaces

Méndez

Partovi‐Nia

Hatay

et al. 2010

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

Oxygen Reduction at the Liquid–Liquid Interface: Bipolar Electrochemistry through Adsorbed Graphene Layers

Rodgers

Dryfe

2015

ChemElectroChem

View full text Add to dashboard Cite

The reduction of oxygen and protons at the interface between two immiscible electrolyte solutions (ITIES) has received a great deal of interest over the last decade, with various materials being used to catalyse these reactions. Probing the mechanisms through which these reactions proceed when using interfacial catalysts is important from both from the perspective of fundamental understanding and for catalyst optimisation. Herein, we have used interfacial‐assembled graphene to probe the importance of simple electron conductivity towards the catalysis of the oxygen reduction reaction (ORR) at the ITIES, and a bipolar setup to probe the homogeneous/heterogeneous nature of the ORR proceeding through interfacial graphene. We found that interfacial graphene provides a catalytic effect towards the reduction of oxygen at the ITIES, proceeding via the heterogeneous mechanism when using a strong reducing agent.

show abstract

Oxygen reduction by decamethylferrocene at liquid/liquid interfaces catalyzed by dodecylaniline

Cited by 39 publications

References 36 publications

Gold Nanofilm Redox Catalysis for Oxygen Reduction at Soft Interfaces

Gold Nanofilm Redox Catalysis for Oxygen Reduction at Soft Interfaces

Molecular electrocatalysis at soft interfaces

Oxygen Reduction at the Liquid–Liquid Interface: Bipolar Electrochemistry through Adsorbed Graphene Layers

Contact Info

Product

Resources

About