Table 1.

Data of performance for nanoconfined reactors of different sizes.

Cell volume [mL]	Electrode surface area[a] [cm2]	NADP+ [μM]	Enzyme in loading process [nmol FNR : nmol GLDH]	TTN[b]	Reaction time [h]	Current density range [μA cm−2]	Yield by coulometry	Yield by NMR
4	3.5	20	7.3 : 0.73	396	8	0–100	30.2 μmol (94 %)	30.1 μmol (93.7 %)
80	73.5	20	348 : 34.8	1,970	27	0–150	3.15 mmol (98.4 %)	3.20 mmol (100 %)
500	525	10	1,092 : 109	3,760	27	0–84	18.8 mmol (94.0 %)	19.8 mmol (99.0 %)

[a] Electrode Dimensions: (1) 4 mL reaction: 1 piece of 2.5 cm×0.7 cm Ti foil; (2) 80 mL reaction: 3 pieces of 3.5 cm×3.5 cm Ti foil; (3) 500 mL reaction: 10 pieces of 7.5 cm×3.5 cm Ti foil; Foils were connected by Ti wire; [b] Total Turnover Number (TTN) of NADP⁺ is defined as the amount of product produced per unit of NADP⁺ used. Electrode potential −0.61 V vs SHE for 4 and 80 mL volumes, −0.59 V for the 500 mL volume.