1. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.1 When transport occurs along parallel fluxlines, the conservation equation takes the simple form given in equation 8:7.

2. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.2 When fluxlines are not parallel, the conservation law takes the form given in equation 8:8.

3. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.3 When fluxlines radiate from a point, equiconcentration surfaces are spheres, or portions thereof, and the conservation equation is as reported in 8:9.

4. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.4 The Grotthuss mechanism. The exchange of a proton H + between an ion and a water molecule mimics true migration and inflates the mobility.

5. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.5 The motion of the junction between two solutions of known conductivity is measured in the moving boundary method.

6. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.6 Typical apparatus for electrophoresis.

7. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.7 In the potential-leap experiment, the WE is suddenly brought to a potential large enough to denude the electrode surface of the electroreactant.

8. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.8 Concentration profiles resulting from the potential-leap experiment for a diffusivity D R = 1.00  10 –9 m 2 s –1. Note that, even after times as long 830 as 100 s, the concentration diminution is confined to a layer of only about one millimeter thickness, easily validating condition 8:27.

9. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.9 A narrow tube interconnects two electrode chambers that are gently stirred to ensure uniform composition in each chamber.

10. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.10 Poiseuille flow through a tube. The velocity profile, given by v (r) = 2V [R 2– r 2 ]/πR 4, where V is the flowrate (m 3 s 1 ), is shown in cross section.

11. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.11 Geometry of the rotating disk electrode, showing also the flowlines followed by the convecting solution.

12. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.12 Coordinates useful in describing the behavior of the solution adjacent to a rotating disk electrode.

13. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.13 The concentration profile at a rotating disk electrode according to equation 8:48. The graph is correctly scaled for the typical value b = (18 μm) 3.

14. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.14 Concentration profiles during the experiment analyzed in Web#852. The neutral species R and the cation O are involved in the electrode reaction R(soln) ⇄ e – + O(soln), while C and A are the cation and anion of the supporting electrolyte.

15. Electrochemical Science and Technology: Fundamentals and Applications, Keith B. Oldham, Jan C. Myland and Alan M. Bond. © 2011 John Wiley & Sons, Ltd. Published 2011 by John Wiley & Sons, Ltd. Figure 8.15 Flux density profiles corresponding to the concentrations shown in Figure 8-14. Notice the transition from the transport being largely that of the electroactive species close to the electrode to being predominantly that of the supporting ions in the bulk. See Web#852 for details.