Table 1.
Comparative data for the Mn‐corrole‐CP working electrode during a 5 h electrolysis as a function of the potential in 0.1 m phosphate buffer (pH 6) saturated with CO2. Standard deviations were calculated after three electrochemical measurements followed by two product analysis measurements.
|
Potential vs. Ag/AgCl [V] |
Potential vs. RHE [V] |
FE % of each CO2 reduced products at different potential with Mn‐Cor‐CP electrode after 5 h of electrolysis |
Total FE% |
Charge passed (Coulomb) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
Acetate |
Methanol |
CO |
H2 |
|
|
|
||||
|
|
|
FE% |
SD |
FE% |
SD |
FE% |
SD |
FE% |
SD |
|
Average |
SD |
|
−1.1 |
−0.524 |
40 |
4.3 |
23 |
3 |
31 |
5 |
– |
– |
94 |
6.3 |
0.2 |
|
−1.2 |
−0.624 |
55 |
4 |
20 |
3 |
20 |
4 |
– |
– |
95 |
9 |
0.25 |
|
−1.25 |
−0.674 |
63 |
3.75 |
16 |
3.5 |
– |
– |
18 |
4.5 |
97 |
14.4 |
0.3 |
|
−1.3 |
−0.724 |
60 |
3.55 |
19 |
2.5 |
– |
– |
19 |
5 |
98 |
17.1 |
0.5 |
|
−1.4 |
−0.824 |
61 |
4 |
9 |
3 |
– |
– |
25 |
6 |
95 |
19.8 |
0.8 |
|
Potential vs. RHE [V] |
Overpotential ηAcOH [mV] |
Overpotential ηMeOH [mV] |
Partial current density [mA cm−2] |
TONAcOH |
TONMeOH |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
|
j AcOH |
j MeOH |
|
|
||||||
|
−0.524 |
264 |
527 |
0.140 |
0.080 |
11.45 |
6.58 |
||||||
|
−0.624 |
364 |
627 |
0.275 |
0.100 |
22.50 |
8.18 |
||||||
|
−0.674 |
414 |
677 |
0.504 |
0.128 |
41.25 |
10.47 |
||||||
|
−0.724 |
464 |
727 |
0.570 |
0.180 |
46.65 |
14.76 |
||||||
|
−0.824 |
564 |
827 |
0.671 |
0.099 |
54.90 |
8.10 |
||||||