Platinum electrodeposition on graphite: electrochemical study and STM imaging

Gloaguen, Frédéric; Léger, J. M.; Lamy, C.; Marmann, A.; Stimming, Ulrich; Vogel, R.

doi:10.1016/s0013-4686(98)00332-6

Cited by 147 publications

(126 citation statements)

References 24 publications

Supporting

Mentioning

104

Contrasting

Unclassified

Order By: Relevance

“…It can be observed that the experimental curve fits better to the progressive nucleation mechanism. This result is similar to those obtained by Gloagen et al on the deposition of platinum on graphite [20]. Fig.…”

Section: Preparation and Characterization Of P-si/bdd/pt By Electrodesupporting

confidence: 92%

Platinum particles deposited on synthetic boron-doped diamond surfaces. Application to methanol oxidation

Montilla

Morallón

Duo

et al. 2003

Electrochimica Acta

120

View full text Add to dashboard Cite

Two methods have been used for the deposition of Pt particles on synthetic boron-doped diamond (BDD) surfaces: chemical deposition and electrodeposition under potentiostatic conditions. However, electrodeposition leads much higher platinum dispersion than chemical deposition. The mechanism of nucleation and growing of the electrodeposited platinum was investigated by means of chronoamperometric studies in acid medium. The electrodeposition on diamond surfaces shows a mechanism of progressive nucleation as deduced from the chronoamperometric studies in acid medium. The stability of the deposited platinum is very low and the platinum particle are dissolved/detached by cycling. The modified BDD electrodes by deposition of platinum have been tested for the oxidation of methanol, showing that multi-step deposition results in higher values of surface and mass activities for methanol oxidation than one-step deposition process. #

show abstract

Section: Preparation and Characterization Of P-si/bdd/pt By Electrodesupporting

confidence: 92%

Platinum particles deposited on synthetic boron-doped diamond surfaces. Application to methanol oxidation

Montilla

Morallón

Duo

et al. 2003

Electrochimica Acta

120

View full text Add to dashboard Cite

show abstract

“…This is similar to the characteristics of the polycrystalline Pt without showing any preferential orientation. The electrochemically active surface area (ECSA) of Pt-based NPs can be calculated from the CVs according to the following equation [64]:…”

Section: Resultsmentioning

confidence: 99%

Shape-controlled synthesis of Pt-Ir nanocubes with preferential (100) orientation and their unusual enhanced electrocatalytic activities

Zhong

Liu

et al. 2014

Sci. China Mater.

View full text Add to dashboard Cite

Pt-Ir nanocubes with (100)-terminated facets were synthesized for the first time and their unusual high electrocatalytic activity for a model reaction (i.e., ammonia oxidation) was reported. The key parameters in controlling the shape of the PtIr nanocubes were systematically investigated by transmission electron microscopy (TEM). The electrocatalytic activities of the prepared Pt-Ir and pure Pt nanoparticles (NPs) were characterized by cyclic voltammetry (CV). The results showed that the amount of W(CO) 6 and the volume ratio of oleylamine and oleic acid play a significant role in the development of well-defined Pt-Ir nanocubes. The resultant Pt-Ir nanocubes exhibit (100) orientation, which has been confirmed by not only the structural characterization results from high-resolution TEM (HRTEM) and X-ray diffraction (XRD) but also hydrogen desorption profiles obtained from the CV measurements in H 2 SO 4 solution. Lattice contraction of the Pt-Ir nanocubes were suggested by HRTEM and XRD measurements, and the electronic interactions between Pt and Ir in the Pt-Ir nanocubes were demonstrated by X-ray photoelectron spectroscopy. The Pt-Ir nanocubes show higher specific activity than pure Pt nanocubes and much higher specific activity than the polycrystalline Pt-Ir NPs. The much improved specific activity of the Pt-Ir nanocubes could be attributed to the reason that the introduction of Ir in the Pt-Ir nanocubes largely maintains the highly active Pt (100) sites and thus a positive synergistic effect through the addition of Ir to Pt could be achieved due to the possible bifunctional mechanism and the electronic effect.

show abstract

“…Brylev et al [28] reported a 3D process with nucleation changing from progressive to instantaneous at more negative potentials, but the values of nucleus density obtained with the i-t analysis disagree with those obtained from SEM by two orders of magnitude. Gloaguen et al [29] have also found, using STM, particle densities exceeding 10 10 cm -2 , which are several orders of magnitude higher than those obtained from the analysis of i-t transients. Langerock and…”

Section: Analysis Of the I-t Transients (Figures 4 And 5) Indicates Tmentioning

confidence: 88%

“…The experimental curves lie in between those corresponding to instantaneous nucleation (IN) and progressive nucleation (PN), but curve (2) in Figure 8 is closer to progressive nucleation, even though it does not fit the theoretical curve perfectly, especially at the very beginning of the transient. Taking into consideration curve (2), the term AN, where A is the nucleation rate and N is the nucleus density, can be calculated using equation (4), where the parameters have the same meaning as in equation (1) The disagreement between the values of N obtained from the chronoamperometric analysis using 3D electrodeposition models and those observed by SEM, STM or AFM has been pointed out by other authors [27][28][29]. Brylev et al [28] reported a 3D process with nucleation changing from progressive to instantaneous at more negative potentials, but the values of nucleus density obtained with the i-t analysis disagree with those obtained from SEM by two orders of magnitude.…”

Section: Analysis Of the I-t Transients (Figures 4 And 5) Indicates Tmentioning

confidence: 99%

Effect of tartaric acid in the electrodeposition of zinc

Torrent‐Burgués

Guaus

2007

J Appl Electrochem

View full text Add to dashboard Cite

The electrodeposition of zinc from sulphate-tartrate baths on a vitreous carbon electrode has been studied. The influence of the tartrate ion on the reduction kinetics of Zn(II) metal ion, and on the mechanism of the electrodeposition process, has been investigated using potentiodynamic and potentiostatic electrochemical techniques and scanning electron microscopy. The voltammetric analysis has shown that the presence of tartrate species in the sulphate bath shifts the reduction potential of Zn(II) to more positive values. A set of equilibria have been proposed to represent the electrochemical process and the influence of pH. From the analysis of the chronoamperometric transients and the SEM images, an instantaneous nucleation with 2D growth at the initial stages has been proposed, and a nucleus density of the order of 10 9 cm -2 has been calculated from both techniques. In order to elucidate the correct mechanism of the electrodeposition process the results obtained from chronoamperometric transients must be corroborated by those of direct observation using microscopic techniques.2

show abstract

Platinum electrodeposition on graphite: electrochemical study and STM imaging

Cited by 147 publications

References 24 publications

Platinum particles deposited on synthetic boron-doped diamond surfaces. Application to methanol oxidation

Platinum particles deposited on synthetic boron-doped diamond surfaces. Application to methanol oxidation

Shape-controlled synthesis of Pt-Ir nanocubes with preferential (100) orientation and their unusual enhanced electrocatalytic activities

Effect of tartaric acid in the electrodeposition of zinc

Contact Info

Product

Resources

About