TY - GEN
T1 - Effects of constituents in photo/biocatalytic hydrogen production system using experimental design tool
AU - Joo, Hyunku
AU - Jang, Yongho
AU - Lee, Sangbong
AU - Shul, Yong Gun
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006
Y1 - 2006
N2 - This study photoelectrochemically and photocatalytically examined the effects of constituents in photo/biocatalytic hydrogen production system, being eventually composed of photoanode and cathode, just after that preliminary mixed slurry system had been investigated to see the insights of the hybrid system. Experiments with the mixed slurry system revealed the following four cases; direct interphase electron transfer from photocatalyst to enzyme in the absence of electron relay was a rate-determining step, enzyme was deactivated by irradiated light, physical properties of photocatalysts, obtained by a couple of preparation methods, seldom affected the production rate, and each material needs different reaction conditions such as pH and temperature. These results led the study to the system where the materials were separated into photoanode and cathode and each material has been studied individually and simultaneously to get the possible optimum condition: for the former photoanodic current and photovoltage were measured for each prepared photocatalysts and for the latter change in the amount of evolved hydrogen was checked according to external bias. Then both reaction parts were connected through Nafion membrane and salt bridge to perform light-induced hydrogen production for the hybrid system. No synergistic effect of the system happened with Nafion, but promising result was obtained with salt bridge. Detailed investigations are under way.
AB - This study photoelectrochemically and photocatalytically examined the effects of constituents in photo/biocatalytic hydrogen production system, being eventually composed of photoanode and cathode, just after that preliminary mixed slurry system had been investigated to see the insights of the hybrid system. Experiments with the mixed slurry system revealed the following four cases; direct interphase electron transfer from photocatalyst to enzyme in the absence of electron relay was a rate-determining step, enzyme was deactivated by irradiated light, physical properties of photocatalysts, obtained by a couple of preparation methods, seldom affected the production rate, and each material needs different reaction conditions such as pH and temperature. These results led the study to the system where the materials were separated into photoanode and cathode and each material has been studied individually and simultaneously to get the possible optimum condition: for the former photoanodic current and photovoltage were measured for each prepared photocatalysts and for the latter change in the amount of evolved hydrogen was checked according to external bias. Then both reaction parts were connected through Nafion membrane and salt bridge to perform light-induced hydrogen production for the hybrid system. No synergistic effect of the system happened with Nafion, but promising result was obtained with salt bridge. Detailed investigations are under way.
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M3 - Conference contribution
AN - SCOPUS:33746063694
SN - 0470080507
SN - 9780470080504
T3 - Ceramic Transactions
SP - 139
EP - 153
BT - Eco-Materials Processing and Design - Proceedings of the 6th Pacific Rim Conference on Ceramic and Glass Technology, PacRim6
T2 - 6th Pacific Rim Conference on Ceramic and Glass Technology, PacRim6
Y2 - 11 September 2005 through 16 September 2005
ER -