Electrochemical adsorption behaviour of platinum stepped surfaces in sulphuric acid solutions

Clavilier, J.; Armand, D.; Sun, Shi‐Gang; Petit, Monique

doi:10.1016/0022-0728(86)90237-8

Cited by 667 publications

(432 citation statements)

References 10 publications

Supporting

Mentioning

410

Contrasting

Unclassified

Order By: Relevance

“…Single-crystal measurements were performed on bead-type single-crystal electrodes between 1 mm and 3 mm diameter, prepared according to Clavilier's method. 52 Prior to each experiment, the electrodes were flame annealed and allowed to cool down in a hydrogen/argon mixture (ca. 3:1) after which they were transferred to the electrochemical cell under the protection of a droplet of deoxygenated ultrapure water.…”

Section: Methodsmentioning

confidence: 99%

Pseudo-Single-Crystal Electrochemistry on Polycrystalline Electrodes: Visualizing Activity at Grains and Grain Boundaries on Platinum for the Fe²⁺/Fe³⁺ Redox Reaction

et al. 2013

View full text Add to dashboard Cite

The influence of electrode surface structure on electrochemical reaction rates and mechanisms is a major theme in electrochemical research, especially as electrodes with inherent structural heterogeneities are used ubiquitously. Yet, probing local electrochemistry and surface structure at complex surfaces is challenging. In this paper, high spatial resolution scanning electrochemical cell microscopy (SECCM) complemented with electron backscatter diffraction (EBSD) is demonstrated as a means of performing ‘pseudo-single-crystal’ electrochemical measurements at individual grains of a polycrystalline platinum electrode, while also allowing grain boundaries to be probed. Using the Fe2+/3+ couple as an illustrative case, a strong correlation is found between local surface structure and electrochemical activity. Variations in electrochemical activity for individual high index grains, visualized in a weakly adsorbing perchlorate medium, show that there is higher activity on grains with a significant (101) orientation contribution, compared to those with (001) and (111) contribution, consistent with findings on single-crystal electrodes. Interestingly, for Fe2+ oxidation in a sulfate medium a different pattern of activity emerges. Here, SECCM reveals only minor variations in activity between individual grains, again consistent with single-crystal studies, with a greatly enhanced activity at grain boundaries. This suggests that these sites may contribute significantly to the overall electrochemical behavior measured on the macroscale.

show abstract

Section: Methodsmentioning

confidence: 99%

Pseudo-Single-Crystal Electrochemistry on Polycrystalline Electrodes: Visualizing Activity at Grains and Grain Boundaries on Platinum for the Fe²⁺/Fe³⁺ Redox Reaction

et al. 2013

View full text Add to dashboard Cite

show abstract

“…[35]. In summary, single crystal electrodes were flame-annealed, cooled down in a H2 + Ar atmosphere and protected by a water film [36]. It has been shown that this treatment leads to surfaces with topographies close to the nominal [37].…”

Section: Methods: Dft Calculations and Experimental Detailsmentioning

confidence: 99%

CO oxidation on stepped-Pt(111) under electrochemical conditions: insights from theory and experiment

Busó-Rogero

Herrero

Bandlow

et al. 2013

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

The co-adsorption of CO and OH on two Pt stepped surfaces vicinal to the (111) orientation has been evaluated by means of density functional theory (DFT) calculations. Focusing on Pt(533) and Pt(221), which contain (100) and (111)-steps, respectively, we find that (111)-steps are more reactive towards CO oxidation than surfaces containing (100)-steps. The DFT results are compared with electrochemical experiments on the CO adsorption and oxidation on these vicinal surfaces.

show abstract

“…Clavilier et al [11]. Prior to every set of experiments the SCE is flame annealed with a Bunsen burner to burn away impurities and to reorder the surface atoms [12].…”

Section: Preparation Of Well-ordered Scementioning

confidence: 99%

The correlation of electrochemical and fuel cell results for alcohol oxidation in acidic and alkaline media

Santasalo-Aarnio

Tuomi

Jalkanen

et al. 2013

Electrochimica Acta

View full text Add to dashboard Cite

Electrochemical adsorption behaviour of platinum stepped surfaces in sulphuric acid solutions

Cited by 667 publications

References 10 publications

Pseudo-Single-Crystal Electrochemistry on Polycrystalline Electrodes: Visualizing Activity at Grains and Grain Boundaries on Platinum for the Fe²⁺/Fe³⁺ Redox Reaction

Pseudo-Single-Crystal Electrochemistry on Polycrystalline Electrodes: Visualizing Activity at Grains and Grain Boundaries on Platinum for the Fe²⁺/Fe³⁺ Redox Reaction

CO oxidation on stepped-Pt(111) under electrochemical conditions: insights from theory and experiment

The correlation of electrochemical and fuel cell results for alcohol oxidation in acidic and alkaline media

Contact Info

Product

Resources

About

Electrochemical adsorption behaviour of platinum stepped surfaces in sulphuric acid solutions

Cited by 667 publications

References 10 publications

Pseudo-Single-Crystal Electrochemistry on Polycrystalline Electrodes: Visualizing Activity at Grains and Grain Boundaries on Platinum for the Fe2+/Fe3+ Redox Reaction

Pseudo-Single-Crystal Electrochemistry on Polycrystalline Electrodes: Visualizing Activity at Grains and Grain Boundaries on Platinum for the Fe2+/Fe3+ Redox Reaction

CO oxidation on stepped-Pt(111) under electrochemical conditions: insights from theory and experiment

The correlation of electrochemical and fuel cell results for alcohol oxidation in acidic and alkaline media

Contact Info

Product

Resources

About

Pseudo-Single-Crystal Electrochemistry on Polycrystalline Electrodes: Visualizing Activity at Grains and Grain Boundaries on Platinum for the Fe²⁺/Fe³⁺ Redox Reaction

Pseudo-Single-Crystal Electrochemistry on Polycrystalline Electrodes: Visualizing Activity at Grains and Grain Boundaries on Platinum for the Fe²⁺/Fe³⁺ Redox Reaction