Table 1 Experimental conditions for faradaic efficiency measurements

From: Electrochemical and chemical cycle for high-efficiency decoupled water splitting in a near-neutral electrolyte

Experiment no.

Figure

Faradaic efficiency (%)

Na2Cr2O7

Cell type

Cathode

Cathode coating

Temp. (°C)

Stirring (r.p.m.)

pH, initial

pH, final

1

 

10 ± 1

-

Double-jacketed cell

Pt foil

-

60

400

5.8

9.2

2

2a,b

98 ± 2

3.8 mM

In situa

7.5

7.9

3

 

80 ± 2

-

Ex situb

5.8

9.5

4

2c–e

72 ± 2

-

Cylindrical cell

Pt coil

-

r.t.

-

5.8

8.3

5

 

13 ± 1

-

400

5.8

10.5

  1. Electrolysis current, 600 mA; electrolysis duration, 5.36 h; 20 ml of 1.5 M NaBr electrolyte (without buffer); r.t., room temperature.
  2. aIn situ coating by electroreduction of Cr2O72– anions and cathodic deposition during electrolysis.
  3. bUsing a precoated cathode from prior electrolysis tests.
Back to article page