Layers, film electrodes

Cofired thick Spinel layer film electrode... 

Cofired thick Colired porous Spinel layer film electrode protection layer... 

Figure 13.1 Electrooxidation of COad and Ci adsorbate layers pie-adsorbed on a Pt/Vulcan thin-film electrode (7 JLgptCm , geometric area 0.28 cm ) in 0.5 M H2SO4 solution during a first positive-going potential scan, and subsequent response of the faradaic (a) and m/z = 44 ion current (b) to the electrode potential in the thin-layer DBMS flow cell. The potential scan rate was 10 mV s and the electrolyte flow rate was 5 p,L s at room temperature. The respective adsorbates were adsorbed at 0.11 V for 10 minutes from CO-saturated solution (solid line), 0.1 M HCHO solution (dashed line), 0.1 M HCOOH solution (dash-dotted line), and 0.1 M CH3OH solution (dash-double-dotted line).

Mercury film electrode (MFE) A thin layer of elemental mercury, usually on graphite, prepared by electrochemical deposition from an aqueous solution of mercury(ii). 

The effects of mercury film electrode morphology in the anodic stripping SWV of electrochemically reversible and quasi-reversible processes were investigated experimentally [47-51], Mercury electroplated onto solid electrodes can take the form of either a uniform thin film or an assembly of microdroplets, which depends on the substrate [51 ]. At low sqtrare-wave frequencies the relationship between the net peak crrrrent and the frequency can be described by the theory developed for the thin-film electrode because the diffusion layers at the snrface of microdroplets are overlapped and the mass transfer can be approximated by the planar diffusion model [47,48],... 

However, at the highest frequencies the diffusion layers are muchthiimer, the microdroplets tend to behave as independent hemispherical microelectrodes and the response differs significantly from the theory of the thin-film electrode [49]. 

A relation between the surface stress and the structural change within the Pb UPD layer on Au film electrode has been studied, applying a bending beam method [487]. A maximum in the surface stress versus potential dependence emerged at the onset of UPD, similarly as in electrocapillary curve. 

The properties of lithium metal were described in Chapter 4, where particular note was made of its high specific capacity and electrode potential. However, because of its highly electropositive nature, it is thermodynamically unstable in contact with a wide variety of reducible materials. In particular, lithium reacts with components of most electrolytes to form a passivating layer. Film formation of this type ensures long shelf life for primary lithium cells, but causes severe problems when the electrode is cycled in a secondary cell. 

Figure 1 Electrocalalytic mechanism when a multimolecular layer film is present on the electrode...

---