Recent Developments of Nanostructured Electrodes for Bioelectrocatalysis of Dioxygen Reduction

Table 3

Catalytic current of oxygen reduction in McIlvaine buffer solution (pH 5.2) recorded at GCE electrodes covered with SWCNTs modified covalently with redox mediator ABTS²⁻ and Nafion layer containing laccase. Scan rate 0.001 V s⁻¹ [81].

GCE-Nafion film modification	𝑗cat (mA/cm^2)^a (at 0.2 V versus SCE)	𝑄ABTS (mC/cm^2a)	𝑗cat/ΓABTS (mA/nmol)
SWCNT with laccase	−0.186
SWCNT-ABTS-side with laccase	−0.199	6.863	5.6
SWCNT-ABTS-end with laccase	−0.066	0.199	54.7
SWCNT-amine-ABTS with laccase	−421.5	7.062	11.5

^aAverage of 5 experiments.