Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Highly ordered pyrolytic graphite electrode

Lee, C.-Y. and Bond, A.M. (2008) Evaluation of levels of defect sites present in highly ordered pyrolytic graphite electrodes using capacitive and faradaic current components derived simultaneously from large-amplitude Fourier transformed ac voltammetric experiments. Anal. Chem., 81, 584- 594. [Pg.157]

Figure 1. Reflectance spectra of Fe-TsPc in 0.1 M NaOH adsorbed on the basal plane of a highly ordered pyrolytic graphite (HOPG) electrode at 0.90 V vs. a-Pd and on a Pt electrode at 0.70 V with Ar (0) and O2 ( A ) saturated solutions. Reproduced with... Figure 1. Reflectance spectra of Fe-TsPc in 0.1 M NaOH adsorbed on the basal plane of a highly ordered pyrolytic graphite (HOPG) electrode at 0.90 V vs. a-Pd and on a Pt electrode at 0.70 V with Ar (0) and O2 ( A ) saturated solutions. Reproduced with...
On highly ordered pyrolytic graphite, HOPG(OOOl) electrodes, no UPD has been detected owing to weak carbon-lead interactions [311]. Deposition occurs by three-dimensional island growth according to Volmer-Weber mechanism. Initial steps are controlled by progressive nucleation on active sites and hemispherical diffusion. [Pg.822]

Figure 10.2 Fe(CN) /4 voltammetry on glassy carbon (GC) fractured in solution, and on basal plane highly ordered pyrolytic graphite (HOPG). 1 mM K4Fe(CN)6 in 1 M KC1, scan rate = 0.2 V/s. AEp for fractured GC voltammogram = 64 mV, corresponding to k° > 0.1 cm/s, AEp for HOPG = 1005 mV, k° = 1 x 10 6 cm/s. Potential scale is relative to silver quasi-reference electrode. Figure 10.2 Fe(CN) /4 voltammetry on glassy carbon (GC) fractured in solution, and on basal plane highly ordered pyrolytic graphite (HOPG). 1 mM K4Fe(CN)6 in 1 M KC1, scan rate = 0.2 V/s. AEp for fractured GC voltammogram = 64 mV, corresponding to k° > 0.1 cm/s, AEp for HOPG = 1005 mV, k° = 1 x 10 6 cm/s. Potential scale is relative to silver quasi-reference electrode.
Cgraphite A highly-ordered pyrolytic graphite (HOPG) electrode was polished so as to expose... [Pg.694]

An electrochemically heterogeneous electrode is one where the electrochemical activity varies over the surface of the electrode. This broad classification encompasses a variety of electrode types [1, 2] including microelectrode arrays, partially blocked electrodes, electrodes made of composite materials, porous electrodes and electrodes modified with distributions of micro- and nanoscale electroactive particles. In this chapter, we extend the mathematical models developed in the previous chapter, in order to accurately simulate microelectrode arrays. Fbrther, we explore the applications of a number of niche experimental systems, including partially blocked electrodes, highly ordered pyrolytic graphite, etc., and develop simulation models for them. [Pg.201]

This chapter addresses several issues dealing with the mechanism of SEI formation on inert substrates, lithium, carbonaceous materials and tin-based alloys. Attention is currently focused on the correlation between the composition and morphology of the solid-electrolyte interphase forming on the different planes of highly ordered pyrolytic graphite (HOPG) and different types of disordered carbon electrodes in lithium-ion cells. [Pg.3]

Through the use of highly ordered pyrolytic graphite (HOPG) it is possible to produce an electrode which is predominantly basal in character, but even with such a surface, edge plane defects will be present in the form of steps (as indicated in Fig. 6.1). Careful preparation can lead to a surface where these edge plane defects are up to 1-10 /uM apart. [Pg.114]

The other major electrochemical modification approach has been that in which aromatic diazonium salts in an electrolyte solution are reduced at a diamond electrode this leads to the formation of an aryl radical, which can then attach to the diamond surface [74], This work is based on a series of papers in which the same technique was applied to the surface modification of glassy carbon and highly ordered pyrolytic graphite (HOPG) [75-78]. This approach may also be quite fruitful for tbe covalent modification of diamond surfaces, if the attachment is as robust as it is on glassy carbon surfaces. [Pg.185]


See other pages where Highly ordered pyrolytic graphite electrode is mentioned: [Pg.449]    [Pg.1149]    [Pg.449]    [Pg.485]    [Pg.4331]    [Pg.119]    [Pg.449]    [Pg.1149]    [Pg.449]    [Pg.485]    [Pg.4331]    [Pg.119]    [Pg.117]    [Pg.295]    [Pg.289]    [Pg.117]    [Pg.224]    [Pg.258]    [Pg.751]    [Pg.416]    [Pg.131]    [Pg.63]    [Pg.187]    [Pg.187]    [Pg.1839]    [Pg.17]    [Pg.435]    [Pg.45]    [Pg.39]    [Pg.199]    [Pg.218]    [Pg.220]    [Pg.238]    [Pg.76]    [Pg.79]    [Pg.480]    [Pg.256]    [Pg.428]    [Pg.157]    [Pg.559]   
See also in sourсe #XX -- [ Pg.694 ]




SEARCH



Electrodes pyrolytic

Graphite electrode

Graphitic Electrodes

High-order

Pyrolytic

Pyrolytic graphite

© 2024 chempedia.info