Enhanced Reactivity for Hydrogen Reactions at Pt Nanoislands on Au(111)

Wolfschmidt, Holger; Weingarth, Daniel; Stimming, Ulrich

doi:10.1002/cphc.201000148

Cited by 39 publications

(43 citation statements)

References 98 publications

(176 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, important parameters such as coverage of the foreign metal, inter particle distances, particle height and the support are discussed to influence the catalytic activity. Effects caused by the properties of the support material are experimentally [41,42,43,44,45] as well as theoretically [46,47,48,49,50,51] investigated towards catalytic and electrocatalytic properties. The investigations require well defined surfaces such as single crystals to investigate the effects in a precise way.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

STM, SECPM, AFM and Electrochemistry on Single Crystalline Surfaces

et al. 2010

Self Cite

View full text Add to dashboard Cite

Scanning probe microscopy (SPM) techniques have had a great impact on research fields of surface science and nanotechnology during the last decades. They are used to investigate surfaces with scanning ranges between several 100 μm down to atomic resolution. Depending on experimental conditions, and the interaction forces between probe and sample, different SPM techniques allow mapping of different surface properties. In this work, scanning tunneling microscopy (STM) in air and under electrochemical conditions (EC-STM), atomic force microscopy (AFM) in air and scanning electrochemical potential microscopy (SECPM) under electrochemical conditions, were used to study different single crystalline surfaces in electrochemistry. Especially SECPM offers potentially new insights into the solid-liquid interface by providing the possibility to image the potential distribution of the surface, with a resolution that is comparable to STM. In electrocatalysis, nanostructured catalysts supported on different electrode materials often show behavior different from their bulk electrodes. This was experimentally and theoretically shown for several combinations and recently on Pt on Au(111) towards fuel cell relevant reactions. For these investigations single crystals often provide accurate and well defined reference and support systems. We will show heteroepitaxially grown Ru, Ir and Rh single crystalline surface films and bulk Au single crystals with different orientations under electrochemical conditions. Image studies from all three different SPM methods will be presented and compared to electrochemical data obtained by cyclic voltammetry in acidic media. The quality of the single crystalline supports will be verified by the SPM images and the cyclic voltammograms. Furthermore, an outlook will be presented on how such supports can be used in electrocatalytic studies.

show abstract

Section: Introductionmentioning

confidence: 99%

“…The investigations require well defined surfaces such as single crystals to investigate the effects in a precise way. Impressive results were found during the last decade by decorating single crystal surfaces [41,42,43,52,53,54,55,56,57,58]. …”

Section: Introductionmentioning

confidence: 99%

STM, SECPM, AFM and Electrochemistry on Single Crystalline Surfaces

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…To increase the current that can be obtained from a battery electrode or fuel cell one has two options, either to increase the surface area A or to increase the exchange current density j 0 . Enhancing j 0 is equivalent to increasing the catalytic activity of an electrode towards a reaction (or partial reaction) [4][5][6][7] .…”

mentioning

confidence: 99%

Determining Electron Transfer Kinetics at Porous Electrodes

Friedl

Stimming

2017

Electrochimica Acta

Self Cite

View full text Add to dashboard Cite

Newcastle University ePrints -eprint.ncl.ac.uk Friedl J, Stimming U. Determining Electron Transfer Kinetics at Porous Electrodes. Electrochimica Acta 2017, 227, 235-245.Abstract:Porous carbon materials are of tremendous importance for electrochemical energy storage. Their low cost, wide potential window and high surface area make them ideal electrodes for many applications.The activity of the electrode towards a certain reaction is given by both the available wetted surface area and the electron transfer constant k 0 . The present study investigates which electrochemical methods are suitable to determine k 0 on porous carbon electrodes. For this purpose, we investigate the ferric/ferrous redox couple on a porous carbon nanotube electrode as model system. We show that results from cyclic voltammetry (CV) can yield an apparent catalytic effect and elucidate its origin.Chronoamperometry and electrochemical impedance spectroscopy are shown to produce consistent values for the exchange current density I 0 , which can then be normalized to k 0 . Limitations of both

show abstract

“…Under usual electrochemical operating conditions, Marković and Conway found better activity for HER on Pt(110) than on other Pt surfaces [49,50]. In the case of particle size effects, the lack of studies is mainly due to the complexity in controlling the particle size and its distribution on the nanometer scale during the synthesis process [51,52]. …”

Section: Strategies With Nanocatalystsmentioning

confidence: 99%

Emerging nanostructured electrode materials for water electrolysis and rechargeable beyond Li-ion batteries

Pomerantseva

Resini

Kovnir

et al. 2017

Advances in Physics: X

View full text Add to dashboard Cite

This review describes recent advances in electrochemical water electrolysis and rechargeable beyond Li-ion battery research, two emergent and widely employed technologies playing important roles in clean energy production and storage. The principle components of these electrochemical processes are electrode materials, which are currently facing challenges in performance improvement, thus motivating the development of novel electrode materials. This development requires synergistic interactions between experimentalists and theorists with backgrounds in solid state chemistry, condensed matter physics, and materials science and engineering. In light of a large amount of literature covering the topic, we will focus this review on the seminal electrode materials that have been discovered in the last five years, such as transition metal chalcogenides, carbides, and phosphides, as well as 2D layered materials. Intensive cross-disciplinary research is also dedicated to nanostructuring and hybridization of the emerging electrode materials in order to maximize the efficiency and simultaneously to lower the cost of the processes. As the understanding of the nanoscale-related effects deepens, it opens important pathways to the discovery of further materials and their improvement.

show abstract

Enhanced Reactivity for Hydrogen Reactions at Pt Nanoislands on Au(111)

Cited by 39 publications

References 98 publications

STM, SECPM, AFM and Electrochemistry on Single Crystalline Surfaces

STM, SECPM, AFM and Electrochemistry on Single Crystalline Surfaces

Determining Electron Transfer Kinetics at Porous Electrodes

Emerging nanostructured electrode materials for water electrolysis and rechargeable beyond Li-ion batteries

Contact Info

Product

Resources

About