CO2
CO2
H2 → 2H+ + 2e-
Eocell =0 V
1/2 O2 + 2H+ + 2e- → H2O
Eocell = 1.23 V
H2(g) + 1/2 O2(g) → H2O(l)
Eocell = 1.23 V
25
Eocell
1.10 V
[Zn2+] [Cu2+]
1M
1.10 V
e-
Zn(s)
e-
Cu(s)
Zn(s) → Zn2+(aq, 1 M) + 2e-
Cu2+(aq, 1 M) + 2e- → Cu(s)
Zn → Zn2+ + 2e-
Eocell = 0.763 V
Cu2+ + 2e- → Cu
Eocell = 0.337 V
Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) Eocell = 1.10 V
(regenerative fuel cell RFC)
e-
e-
H2(g)
O2(g), H2O(l)
H2(g)
O2(g)
H2 → 2H+ + 2e-
Eocell =0 V
1/2 O2 + 2H+ + 2e- → H2O
Eocell = 1.23 V
H2(g) + 1/2 O2(g) → H2O(l)
Eocell = 1.23 V
1 2
2H2O(l) → O2( g) + 4H+(aq) + 4e2H2O(l) + 2e- → H2(g) + 2OH- (aq)
2H2O(l) → 2H2(g) + O2(g)
3
2
1
1
2
2
1
1
1
2
1
1.5V
40ml
LED
Sodium hydroxide
/
NaOH
/
Potassium hydroxide
/
KOH
/
Sodium sulfate
Na2SO4
2.671
Potassium sulfate
2.66
K2SO4
Sulfuric Acid
338
H2SO4
1
1
2
3
3
4
2
1
2
3
3
5
5mm
4mm
3
1
2
5mm
3
1cm
4
1.
KOH Na2SO4
40ml
K2SO4 H2SO4
NaOH
2.
3.
4.
5.
(1)3V
(2)
6.
5
1.5ml
3 ml
1 2
2 H2O → 2 H2 + O2
1
30
2
3
9V
3V
7.
1 2
1.
2.
LED
1.
NaOH KOH Na2SO4
2.
3.
4.
1.
2.
3.
1.
2.
3.
4.
5.
6.
NaOH KOH
K2SO4
H2SO4
1.
2004
62
2003
2.
156-159
3.
4.
5.
4
547-554
66
NaOH/
KOH
H2SO4
Na2SO4
K2SO4
M
V
V
LED