Construction and Reactivity Screening of a Surface Composition Gradient for Combinatorial Discovery of Electro-Oxidation Catalysts

Jayaraman, Shrisudersan; Hillier, Andrew C.

doi:10.1021/cc034030k

Cited by 59 publications

(41 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In subsequent work, gel transfer technology was used in combination with electrodeposition to design high density CCS libraries. 359 In this method, a gel containing an uniform concentration of a single metal salt is impregnated at a single point with a second metal salt; the diffusion of the point source into the semi-infinite gel then creates the desired composition gradient. Samples are then electrodeposited using normal methods and the gel is removed, yielding samples with continuously varying composition gradients.…”

Section: Catalysts For Fuel Cell Anodesmentioning

confidence: 99%

“…167,353,354,[360][361][362] To mitigate diffusion issues, some groups have created semi-discrete arrays by micromachining. 349 Another method of circumventing the limited spatial resolution of fluorescence is to raster a small counter electrode, which acts as a scanning electrochemical microscope, 359,363 because areas of the library with increased activity will generate more hydrogen and thus a larger current. Similar electrochemical screening techniques have been employed to characterize the effect of corrosion inhibiting additives to the electrolyte on different metallic wires, to great effect.…”

Section: Catalysts For Fuel Cell Anodesmentioning

confidence: 99%

See 1 more Smart Citation

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Green

Takeuchi

Hattrick‐Simpers

2013

Journal of Applied Physics

224

189

View full text Add to dashboard Cite

High throughput (combinatorial) materials science methodology is a relatively new research paradigm that offers the promise of rapid and efficient materials screening, optimization, and discovery. The paradigm started in the pharmaceutical industry but was rapidly adopted to accelerate materials research in a wide variety of areas. High throughput experiments are characterized by synthesis of a "library" sample that contains the materials variation of interest (typically composition), and rapid and localized measurement schemes that result in massive data sets. Because the data are collected at the same time on the same "library" sample, they can be highly uniform with respect to fixed processing parameters. This article critically reviews the literature pertaining to applications of combinatorial materials science for electronic, magnetic, optical, and energy-related materials. It is expected that high throughput methodologies will facilitate commercialization of novel materials for these critically important applications. Despite the overwhelming evidence presented in this paper that high throughput studies can effectively inform commercial practice, in our perception, it remains an underutilized research and development tool. Part of this perception may be due to the inaccessibility of proprietary industrial research and development practices, but clearly the initial cost and availability of high throughput laboratory equipment plays a role. Combinatorial materials science has traditionally been focused on materials discovery, screening, and optimization to combat the extremely high cost and long development times for new materials and their introduction into commerce. Going forward, combinatorial materials science will also be driven by other needs such as materials substitution and experimental verification of materials properties predicted by modeling and simulation, which have recently received much attention with the advent of the Materials Genome Initiative. Thus, the challenge for combinatorial methodology will be the effective coupling of synthesis, characterization and theory, and the ability to rapidly manage large amounts of data in a variety of formats. V C 2013 AIP Publishing LLC. [http://dx

show abstract

Section: Catalysts For Fuel Cell Anodesmentioning

confidence: 99%

Section: Catalysts For Fuel Cell Anodesmentioning

confidence: 99%

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Green

Takeuchi

Hattrick‐Simpers

2013

Journal of Applied Physics

224

189

View full text Add to dashboard Cite

show abstract

“…Die Messverfahren kamen auch zur Untersuchung von kombinatorischen Arrays aus PtRu-und PtRuMo-Elektrokatalysatoren zum Einsatz. [322,323] Weiterhin wurden Pt-TiO 2 -Nanokompositelektroden mit dem H + /H 2 -System untersucht. [324] Die Reaktivität von Metallnanoclustern, die insbesondere in der Brennstoffzellentechnik bedeutsam sind, wurde auf verschiedenen Substraten im GC-Modus charakterisiert.…”

Section: Elektrochemische Rastermikroskopieunclassified

Elektrochemische Rastermikroskopie zur direkten Abbildung von Reaktionsgeschwindigkeiten

Wittstock¹,

Burchardt²,

Pust³

et al. 2007

Angewandte Chemie

View full text Add to dashboard Cite

Eine entscheidende Rolle in der Elektrochemie, aber auch in biologischen Systemen oder beim Transport durch Membranen, spielen lokale Prozesse an Fest‐flüssig‐Grenzflächen oder Flüssig‐flüssig‐Grenzflächen, die z. B. an Defektstellen, an Poren oder an einzelnen Zellen ablaufen und sich durch integrale Untersuchungsverfahren nur schwer erfassen lassen. Mit der elektrochemischen Rastermikroskopie steht eine Untersuchungsmethode für lokale Grenzflächenreaktionen zur Verfügung, die nach zwei Jahrzehnten Entwicklung eine solide theoretische Basis und eine große Zahl von Anwendungen aufweist. Sie bietet die Möglichkeit, Geschwindigkeiten heterogener Reaktionen direkt abzubilden und Oberflächen durch elektrochemisch erzeugte Reaktanten lokal zu modifizieren. Die Vielfalt der Anwendungen reicht von klassischen elektrochemischen Fragestellungen bei der Untersuchung lokaler Korrosionsphänomene und elektrokatalytischer Reaktionen in Brennstoffzellen, von Sensoroberflächen, Biochips und mikrostrukturierten Analysesystemen bis hin zum Massentransport durch synthetische Membranen, Haut und Gewebe sowie interzellulären Kommunikationsprozessen. Außerdem können Prozesse an Flüssigkeitsoberflächen oder an Flüssig‐flüssig‐Grenzflächen untersucht werden.

show abstract

“…The rate constants extracted from individual SECM approach curves could be assembled to a Tafel plot (Figure 12). Jambunathan et al also demonstrated investigations of more complex reactions such as the catalytic activity of polycrystalline Pt electrodes in the presence of carbon monoxide [149] and of combinatorial arrays of PtRu and PtRuMo electrocatalysts [150,151] (Figure 13). Pt-TiO 2 nanocomposite electrodes have also been studied using the H + .H 2 system [152].…”

Section: Hydrogen Oxydation Reactionmentioning

confidence: 99%

Investigation of Localized Catalytic and Electrocatalytic Processes and Corrosion Reactions with Scanning Electrochemical Microscopy (SECM)

Pust¹,

Maier²,

Wittstock³

2008

Zeitschrift Für Physikalische Chemie

View full text Add to dashboard Cite

Scanning Electrochemical Microscopy (SECM) . Catalytic Electrodes .Electrochemical Energy Conversion . Fuel Cells . Oxygen Reduction Reaction . CorrosionScanning electrochemical microscopy (SECM) has developed into a very versatile tool for the investigation of solid-liquid, liquid-liquid and liquid-gas interfaces. The arrangement of an ultramicroelectrode (UME) in close proximity to the interface under study allows the application of a large variety of different experimental schemes. The most important have been named feedback mode, generation-collection mode, redox competition mode and direct mode. Quantitative descriptions are available for the UME signal, depending on different sample properties and experimental variables. Therefore, SECM has been established as an indispensible tool in many areas of fundamental electrochemical research. Currently, it also spreads as an important new method to solve more applied problems, in which inhomogeneous current distributions are typically observed on different length scales. Prominent examples include devices for electrochemical energy conversion such as fuel cells and batteries as well as localized corrosion phenomena. However, the direct local investigation of such systems is often impossible. Instead, suitable reaction schemes, sample environments, model samples and even new operation modes have to be introduced in order to obtain results that are relevant to the practical application. This review outlines and compares the theoretical basis of the different SECM working modes and reviews the application in the area of electrochemical energy conversion and localized

show abstract

Construction and Reactivity Screening of a Surface Composition Gradient for Combinatorial Discovery of Electro-Oxidation Catalysts

Cited by 59 publications

References 31 publications

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Elektrochemische Rastermikroskopie zur direkten Abbildung von Reaktionsgeschwindigkeiten

Investigation of Localized Catalytic and Electrocatalytic Processes and Corrosion Reactions with Scanning Electrochemical Microscopy (SECM)

Contact Info

Product

Resources

About