Solar Hydrogen Update
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Transcript of Solar Hydrogen Update
Solar Hydrogen Update
1st December 2009
Updates
- Plasma deposition unit- Failure due to faulty VGA card. Should be up for running by next week
- Separating system of carver’s reactor
Carver’s ReactorReactor setup
H2 O2
Reactor
Pump
FeedTank
Carver’s ReactorDesign of the T-Piece for separation
- Use of a normal T-piece- Poor liq-gas separation
Ideas:
Gas
Liq
From reactor From reactor
Gas
Liq
Since last week….
• Effect of Sn-doping– Lower/higher doping concentrations
• Film thickness measurements
-0.05
0.00
0.05
0.10
0.15
0.20
0.25
-0.60 -0.40 -0.20 0.00 0.20 0.40 0.60 0.80
Potential vs qre / Volts
AD
C o
/p
/ V
olt
Fe2O3: Photocurrent-voltage: Illumination @ 450 nm
Fe2O3: Photocurrent spectra: film thickness
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
250 300 350 400 450 500 550 600 650 700 750
Wavelength / nm
No
rmal
ised
Ph
oto
curr
ent
/ ar
b u
nit
s
10 Layers 15 Layers 20 Layers
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
250 300 350 400 450 500 550 600 650 700 750
Wavelength / nm
No
rmal
ised
Ph
oto
curr
ent
/ ar
b u
nit
s
10 Layers-high Sn
10 Layers-Std Sn @ 0.5V
10 Layers-Std Sn-0.2V
Fe2O3: Photocurrent spectra: dopant concentration
Carver Reactor Development: 1
Carver Reactor Development: 2
Electrochemical CO2 Reduction
• Target fuels– Methanol (Primary) (Mo, CuO + ZnO + Al2O3)
– Formate (Secondary) (Pb, In)
Systems to be studied
• Nafion– 2D cathode
• Liquid aqueous• Liquid non-aqueous
– 3D cathode• Liquid aqueous• Liquid non-aqueous• Liquid/gas aqueous• Liquid/gas non-aqueous
Systems to be studied (continued)
• High T proton conductors (V2O5·nH2O, K(HPO3H), CsH2PO4)
– 2D cathode• Pure CO2
• CO2 + steam
– 3D cathode• Pure CO2
• CO2 + steam
Work in progress
• System design
• Studying the fabrication of high temperature proton conductors