The Diffusion Categories

2 The Diffusion Categories Following a classification in a recent review [42], the situation of the microparticle-modified electrode can be described and treated as that of a spatially heterogeneous, or partially blocked, electrode. The solid macroelectrode is partially covered with microparticles, which - for the sake of theoretically 

From the block radius of 45 pm, the 5 values calculated from Equation 6.15 are, for example, 125 pm and 80pm for scan rates of 10 and 25 mVs , respectively, and therefore the electrode can be assigned to category 3. For lOOmVs (and above) however, with 5 = 40 pm, this electrode is showing category 2 behavior. The scan rate behavior is changing accordingly. 

Streeter et al. used the model system of glassy carbon microspheres each of 

15 5 pm radius, covered with Pd, and abrasively transferred and attached onto the 

1 M KCI at a 5 mm-diameter BPPC electrode curves (a), (b), and (c) correspond respectivelyto 

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