Publications
251 results found
Ahmad EA, Liborio L, Kramer D, et al., 2011, Thermodynamic stability of LaMnO<sub>3</sub> and its competing oxides: A hybrid density functional study of an alkaline fuel cell catalyst, PHYSICAL REVIEW B, Vol: 84, ISSN: 2469-9950
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- Citations: 37
Elias S, Quinson J, Britovsek GJP, et al., 2011, Electrocatalytic CO<sub>2</sub> reduction using modified electrodes, 242nd National Meeting of the American-Chemical-Society (ACS), Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Bidault F, Kucernak A, 2011, Cathode development for alkaline fuel cells based on a porous silver membrane, JOURNAL OF POWER SOURCES, Vol: 196, Pages: 4950-4956, ISSN: 0378-7753
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- Citations: 26
Sleightholme AES, Kucernak A, 2011, An anomalous peak observed in the electrochemistry of the platinum/perfluorosulfonic acid membrane interface, ELECTROCHIMICA ACTA, Vol: 56, Pages: 4396-4402, ISSN: 0013-4686
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- Citations: 9
Shirshova N, Shaffer M, Steinke JHG, et al., 2011, Strutural Polymer Composites for Energy Storage Devices, 1st Chemical and Biomedical Engineering Symposium
Mao B, Kurtoglu A, Kucernak ARJ, et al., 2011, Exploiting carbon nanotubes in fuel cells, NSTI Nanotechnology Conference and Expo, Publisher: CRC PRESS-TAYLOR & FRANCIS GROUP, Pages: 807-809
Marinescu M, Urbakh M, Barnea T, et al., 2010, Electrowetting Dynamics Facilitated by Pulsing, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 114, Pages: 22558-22565, ISSN: 1932-7447
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- Citations: 20
Xu H, Zalitis C, Rivera-Hernandez M, et al., 2010, Fuel cell catalysts based on core-shell nano-particles, Pages: 475-476
In this work, we used platinum black to improve the dispersion mechanisms onto highly oriented pyrolytic graphite substrates by using different solvents in order to develop a methodology to disperse core-shell Pt nanoparticles. With this technique, we found that pure isopropyl alcohol exhibited better dispersion onto graphite in comparison with a mixed solution. Although SEM and STM images revealed in general a poor dispersion, some aggregates and few individual particles scattered onto the graphite surface were observed.
Kornyshev AA, Kucernak AR, Marinescu M, et al., 2010, Ultra-Low-Voltage Electrowetting, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 114, Pages: 14885-14890, ISSN: 1932-7447
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- Citations: 44
Bidault F, Kucernak A, 2010, A novel cathode for alkaline fuel cells based on a porous silver membrane, JOURNAL OF POWER SOURCES, Vol: 195, Pages: 2549-2556, ISSN: 0378-7753
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- Citations: 34
Brett DJL, Kucernak AR, Aguiar P, et al., 2010, What happens inside a fuel cell? Developing an experimental functional map of fuel cell performance, ChemPhysChem, Vol: 11, Pages: 2714-2731
Brown RJC, Brett DJL, Kucernak ARJ, 2009, An electrochemical quartz crystal microbalance study of platinum phthalocyanine thin films, JOURNAL OF ELECTROANALYTICAL CHEMISTRY, Vol: 633, Pages: 339-346, ISSN: 1572-6657
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- Citations: 8
Jiang J, Kucernak A, 2009, Probing anodic reaction kinetics and interfacial mass transport of a direct formic acid fuel cell using a nanostructured palladium-gold alloy microelectrode, ELECTROCHIMICA ACTA, Vol: 54, Pages: 4545-4551, ISSN: 0013-4686
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- Citations: 27
Jiang J, Kucernak A, 2009, Electrocatalytic properties of nanoporous PtRu alloy towards the electrooxidation of formic acid, JOURNAL OF ELECTROANALYTICAL CHEMISTRY, Vol: 630, Pages: 10-18, ISSN: 1572-6657
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- Citations: 47
Jiang J, Kucernak A, 2009, Electrodeposition of highly alloyed quaternary PtPdRuOs catalyst with highly ordered nanostructure, ELECTROCHEMISTRY COMMUNICATIONS, Vol: 11, Pages: 1005-1008, ISSN: 1388-2481
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- Citations: 12
kucernak, junhua J, 2009, NANOPOROUS/MESOPOROUS PALLADIUM CATALYST
The present invention provides a catalytic system comprising a catalyst comprising nanoporous or mesoporous palladium and an ion-exchange electrolyte, processes for manufacturing the catalytic system and catalyst, and processes for oxidising or reducing organic and/or inorganic molecules using the catalyst or catalytic system.
Jiang J, Kucernak A, 2009, Synthesis of highly active nanostructured PtRu electrocatalyst with three-dimensional mesoporous silica template, ELECTROCHEMISTRY COMMUNICATIONS, Vol: 11, Pages: 623-626, ISSN: 1388-2481
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- Citations: 22
Brett DJL, Kucernak AR, Atkins S, 2009, Experimental functional map of a polymer electrolyte fuel cell, ISBN: 9781604565607
Fuel cell performance is determined by the complex interplay of mass transport, energy transfer and electrochemical processes. The convolution of these processes leads to spatial heterogeneity in the way that fuel cells perform, particularly due to reactant consumption, water management and the design of fluid-flow plates. It is therefore unlikely that any bulk measurement made on a fuel cell will represent performance at all parts of the cell. The ability to make spatially resolved measurements in a fuel cell provides one of the most useful ways in which to monitor and optimise performance. This book reviews the range of in situ techniques being used to study fuel cells and describes the use of novel experimental techniques that the authors have used to develop an experimental functional map of polymer electrolyte fuel cell (PEFC) performance. These techniques include the mapping of current density, electrochemical impedance, electrolyte conductivity, contact resistance and CO poisoning distribution within working PEFCs, as well as mapping the flow of reactant in gas channels using laser Doppler anemometry (LDA). The combination of these techniques, applied across a range of fuel cell operating conditions allows a unique picture of the internal workings of PEFCs to be obtained and has been used to validate both numerical and analytical models.
Kim J-D, Ohnuma M, Nishimura C, et al., 2009, Small-Angle X-Ray Scattering and Proton Conductivity of Anhydrous Nafion-Benzimidazole Blend Membranes, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 156, Pages: B729-B734, ISSN: 0013-4651
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- Citations: 17
kucernak, monroe, kornyshev, et al., 2008, ELECTROWETTING DEVICES
A device comprising: a chamber containing two immiscible conductive liquids, the liquids having an interface therebetween; and electrodes arranged to apply a voltage across the interface between the said liquids such as to control the shape of the interface.
Wieckowski, Gewirth, Koper, et al., 2008, General discussion, Faraday Discussions, Vol: 140, Pages: 185-207, ISSN: 1359-6640
Gewirth, Armstrong, Nestoridi, et al., 2008, General discussion, Faraday Discussions, Vol: 140, Pages: 417-437, ISSN: 1359-6640
Kucernak AR, Toyoda E, 2008, Studying the oxygen reduction and hydrogen oxidation reactions under realistic fuel cell conditions, ELECTROCHEMISTRY COMMUNICATIONS, Vol: 10, Pages: 1728-1731, ISSN: 1388-2481
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- Citations: 43
Kucernak ARJ, Offer GJ, 2008, Calculating the coverage of saturated and sub-saturated layers of carbon monoxide adsorbed onto platinum, Journal of Electroanalytical Chemistry
Sleightholme AES, Varcoe JR, Kucernak AR, 2008, Oxygen reduction at the silver/hydroxide-exchange membrane interface, ELECTROCHEMISTRY COMMUNICATIONS, Vol: 10, Pages: 151-155, ISSN: 1388-2481
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- Citations: 52
Kucernak AR, Offer GJ, 2008, The role of adsorbed hydroxyl species in the electrocatalytic carbon monoxide oxidation reaction on platinum, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 10, Pages: 3699-3711, ISSN: 1463-9076
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- Citations: 35
Wieckowski, Gewirth, Koper, et al., 2008, Mesoscopic mass transport effects in electrocatalytic processes Discussion, FARADAY DISCUSSIONS, Vol: 140, Pages: 185-207, ISSN: 1364-5498
Professor G, Dr A, Miss N, et al., 2008, Electro-oxidation of ethanol and acetaldehyde on platinum single-crystal electrodes Discussion, FARADAY DISCUSSIONS, Vol: 140, Pages: 417-437, ISSN: 1359-6640
Kucernak A, 2007, Electrochemically etched carbon fiber electrodes, Handbook of Electrochemistry, Pages: 221-226, ISBN: 9780444519580
Etched insulated carbon fiber electrodes can be prepared from a suitable source of graphitized carbon fibers, copper wire, colloidal graphite, and a cathodic electrophoretic paint. The processes involved in the production of these electrodes involve mounting the carbon fibers, etching them to produce a sharp tip, and subsequent insulation of the tip so that only the very end of the tip is exposed. Etching of the electrodes requires a variable voltage AC source (50 Hz, 1-10 Vac), an AC current meter capable of measuring in the μA range and a suitable linear translation stage. Insulation of the electrode requires a DC power supply (0-20 V), linear translation stage, microscope, and oven. The insulation process involves two separate stages: electrophoretic deposition of paint onto the tip surface followed by a curing step at high temperatures during which the paint particles fuse together. Cathodic electrophoretic paint is the preferred polymeric material used to insulate the carbon fibers as the negative potentials required for deposition avoid any possibility of oxidative dissolution of the carbon fiber. Testing of electrodes requires a high-gain low-noise potentiostat. Testing is performed to determine the presence of any pinholes in the insulation. The quality of the coating of the electrode may be assessed in a nondestructive manner by measuring the diffusion limited current response as a function of the extent of immersion of the electrode into a suitable electrolyte solution. A more destructive approach to assessing the quality of the coating may be performed by polarizing the electrode in an electrolyte containing a suitable metal salt. © 2007 Elsevier B.V. All rights reserved.
Kucernak A, 2007, Single particle deposition on nanometer electrodes, Handbook of Electrochemistry, Pages: 709-718, ISBN: 9780444519580
This chapter describes the electrochemical deposition of single particles onto electrodes of nanometer dimensions. The chapter mainly focuses on the deposition of material on nanometer-sized electrodes and the uses of such composite systems. There are a number of methods which in principle allow the formation of a nanoelectrode-film/particle composite: (a) direct physical contact of electrode to particle; (b) electrochemical deposition of particle or film; and (c) electrophoretic deposition of particles. Direct physical contact with a particle is made difficult in the nanoscopic regime because of the difficulty in imaging the particle system. For electrodes and particles in the micron-size domain, it is possible to use optical microscopes to see the particles and, using micromanipulators, move the electrode so that it is in contact with the particle. Deposition of particles through electrochemical deposition requires a suitable substrate and electrochemical system which shows a suitable nucleation density. The use of nanoelectrodes of suitable materials will allow a significant growth of understanding of nucleation and growth of a diverse number of systems. Standard electrochemical theory has been applied to the growth of single particles on microelectrodes. The growth of a single particle during single nucleation and growth is commonly preceded by an induction period. The formation of new nuclei is a result of aggregation of small atom clusters due to surface diffusion along the electrode surface. After the induction period, growth of the particle may be measured by following the current transient. The production of single nuclei is somewhat helped by the formation of "nucleation exclusion zones" around the growing particles. In the area surrounding a growing particle, there will be a reduction in the concentration of precursor, and this will reduce the probability of nucleating a new particle. © 2007 Elsevier B.V. All rights reserved.
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