Development of Mox Ruy Sez (CO)n electrocatalysts by screen printing and sintering for fuel cell applications

Sebastian, P.J.; Rodriguez, Fernand

doi:10.1179/026708400322911500

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…An ongoing strategy in our group is to develop materials in a nanodivided form using carbonyl based metal molecular clusters as precursors [24]. Neutral metal carbonyls of osmium, ruthenium, tungsten, iron and molybdenum have been employed by other authors to synthesize cathode materials based on one- [25-27, 29, 33, 34, 39-43, 46] or two-metal [28,[30][31][32][35][36][37][38] centered clusters with selenium or sulphur, using the same chemical route proposed by the current author [24,[49][50][51][52]. Although, the feasibility has been demonstrated, the nature of the catalyst materials, from a composition and structural point of view, has been poorly described.…”

Section: Introductionmentioning

confidence: 99%

Carbonyl Tailored Electrocatalysts

Alonso-Vante¹

2006

Fuel Cells

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In recent years, a number of carbonyl clusters have been used as precursors to synthesize electrocatalysts of the nanolength scale for fuel cell reactions. This short review aims to delineate the concepts underlying the synthesis of these type of materials, highlighting the rationale of this type of research. Some selected examples regarding fuel cell reactions at the anode and the cathode are discussed.

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Section: Introductionmentioning

confidence: 99%

Carbonyl Tailored Electrocatalysts

Alonso-Vante¹

2006

Fuel Cells

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“…Impedance spectroscopy is an effective method for probing the features of the surface of modified electrode [18,24,25]. Figure 10 illustrates the results of impedance spectroscopy on Pt–Ni–Cu/GCE and bare GCE in a solution containing 10 mM glucose and 1M KOH at theOCV.…”

Section: Resultsmentioning

confidence: 99%

“…Impedance spectroscopy is an effective method for probing the features of the surface of modified electrode [18,24,25].…”

Section: Eis Measurementsmentioning

confidence: 99%

Electroplating of Pt–Ni–Cu nanoparticles on glassy carbon electrode for glucose electro-oxidation process

Eshghi

Kheirmand

2019

Surface Engineering

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Platinum and nickel-copper nanoparticles were electrodeposited on glassy carbon electrode (GCE) by using cyclic voltammetry (CV)-based electroplating technique. Morphology and chemical composition of the newly designed electrode was studied via scanning electron microscope, energy dispersive X-ray and elemental mapping analysis. This electrode was eventually employed to electro-oxidation of glucose using CV, chronoamperometry (CA) and electrochemical impedance spectroscopy techniques. Pt-Ni-Cu/GCE is capable of electrooxidation of glucose at a low potential and generating high peak current density. The results of CV and CA revealed the high catalytic activity of the Pt-Ni-Cu/GCE and steady-state activity for glucose electro-oxidation. Compared to the other electrodes reported in the previous literature, Pt-Ni-Cu/GCE shows a better potential as an anode. Low electrochemical charge transfer resistance (R ct ) is of particular advantages for the Pt-Ni-Cu/GCE. This electrode is a good choice as an anode for application in direct glucose alkaline fuel cells.

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“…Using the flow chart schematized in Figure 7.22 as a synthesis basis, other groups report chalcogenide materials in which CO is still involved as a ligand in, for example, Ru x Fe y Se z (CO) n , Mo x Ru y Se z (CO) n , W-Se-Os(CO) n , Mo x S y (CO) n , Mo x Se y (CO) n or W(CO) n [121][122][123][124][125][126][127][128][129][130][131][132][133][134][135][136]. These descriptive stoichiometries are most probably the result of an incomplete reaction of pyrolysis of the reactants, and make the understanding of the role of the catalytic sites of cathode materials rather difficult.…”

Section: Synthesis Of Metal Chalcogenidesmentioning

confidence: 99%

Methanol‐Tolerant Cathode Catalysts for DMFC

Lamy

Coutanceau

Alonso‐Vante

2009

Electrocatalysis of Direct Methanol Fuel Cells

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In this chapter, we will summarize the kinetic behavior of the oxygen reduction reaction (ORR), mainly on platinum electrodes since this metal is the most active electrocatalyst for the ORR in an acidic medium. The discussion will, however, be restricted to the characteristics of this reaction in direct methanol fuel cells (DMFCs) because the possible presence in the cathode compartment of methanol, which can crossover the proton exchange membrane and react with oxygen. IntroductionThe oxygen electrode has been the subject of many extensive investigations over the past century. The pronounced irreversibility of the cathodic and anodic reactions in aqueous solutions has imposed severe limitations on the information that can be obtained concerning the pathways from electrochemical kinetic studies. In most instances at current densities practical for fuel cell applications, the current-voltage data are not sensitive to the back reaction and hence yield information only up to the rate-determining step (r.d.s.), which usually occurs early in a multiple-step reaction sequence. Further the reduction and oxidation processes are usually studied only at widely separated potentials and thus the surface conditions differ sufficiently, so that the reduction and oxidation pathways are probably not complementary. The situation is still more complicated by the large number of possible pathways and intermediate states for the O 2 electrode reactions.The surface states of the anodic films play a key role in the reaction mechanisms. They usually depend strongly on potential and also on the time history of the electrode. Thus complex kinetic behavior of the ORR at a Pt electrode has been observed as a function of potential.

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Development of Mo_x Ru_y Se_z (CO)_n electrocatalysts by screen printing and sintering for fuel cell applications

Cited by 6 publications

References 18 publications

Carbonyl Tailored Electrocatalysts

Carbonyl Tailored Electrocatalysts

Electroplating of Pt–Ni–Cu nanoparticles on glassy carbon electrode for glucose electro-oxidation process

Methanol‐Tolerant Cathode Catalysts for DMFC

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