Table 4 Comparison of different HHO wet cells performance and productivity; values represent the mean ± standard deviation calculated from three independent experimental runs.

Specific energy (KWh.m^− 3)

13.89 ± 0.49

7.73 ± 0.27

4.4 ± 0.15

3.1 ± 0.11

Flow rate

(L/min [m³/h])

0.36 [0.0216] ± 0.015

0.88 [0.0528] ± 0.036

1.5 [0.09] ± 0.061

3.37 [0.2022] ± 0.136

Yield per current (L·min⁻¹·A⁻¹)

0.0144

0.0259

0.0455

0.0648

Areal production rate (L·min⁻¹·cm⁻²)

1.88 × 10⁻⁴

4.60 × 10⁻⁴

1.75 × 10⁻⁴

3.94 × 10⁻⁴

Current (A)

25

34

33

52

Power (W)

300

408

396

624

Temperature (^◦C)

38

36

25

58