2018 Fiscal Year Annual Research Report
Photo-electrochemical water-splitting on conducting polymer composite materials
| Project/Area Number |
16K05922
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| Research Institution | Waseda University |
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Principal Investigator |
ウィンザージェンセン B 早稲田大学, 理工学術院, 教授(任期付) (70770410)
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | Water splitting / Conducting polymers / Hydrogen / Electrochemistry |
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| Outline of Annual Research Achievements |
I2 has successfully been identified as ideal replacement oxidant for polymerization of polyterthiophene (I2-PTTh) and similar thiophene-containing “ter-mers”. While illuminated I2-PTTh reached H2 evolution rates of 330 mmol h-1 g-1 other derivatives achieved up to 600 mmol h-1 g-1.
The maximum photo voltage depends on the position of the HOMO level of the polymer derivatives and for poly(pheny1-1,4 dithiophene) (PDTB) a photo voltage higher than the thermodynamical limit for water-splitting (1.23 V) was obtained, which facilitated complete light-driven water-splitting using MnOx as anode catalyst.
The catalytic activity for the polymers is not following the expected Nernstian dependency of pH, but rather shows an increase in onset potential at higher pH, which make them an ideal match for oxygen evolution electrodes like MnOx.
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Research Products
(4 results)
