TY - JOUR
T1 - A New Class of Molecular-Based Photoelectrochemical Cell for Solar Hydrogen Production Consisting of Two Mesoporous TiO2 Electrodes
AU - Morita, Kohei
AU - Sakai, Ken
AU - Ozawa, Hironobu
N1 - Funding Information:
This work was supported by Grants-in-Aid for Scientific Research (B) (15H03786 and 18H01996 to K.S.) and (C) (16K05726 to H.O.), a Grants-in-Aid for Scientific Research on Innovative Areas “Artificial Photosynthesis” (2406, 24107004 to K.S.), and “Innovations for Light-Energy Conversion” (18H05171 to K.S. and H.O.) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan. This was further supported by the International Institute for Carbon Neutral Energy Research (WPI-I2CNER), sponsored by the World Premier International Research Center Initiative (WPI), MEXT, Japan.
Publisher Copyright:
© Copyright 2019 American Chemical Society.
PY - 2019/2/25
Y1 - 2019/2/25
N2 - A new class of molecular-based photoelectrochemical cell for solar hydrogen production consisting of a TiO2-based photoanode modified with a polypyridyl ruthenium photosensitizer (Ru-qpy) and a TiO2-based cathode modified with a platinum porphyrin H2 evolution catalyst has been investigated, showing that the electron accumulation at the conduction band of TiO2 at the photoanode is promoted via electron injection from the Ru-qpy together with hole scavenging by a sacrificial donor. Our study here for the first time unveils that the upward shift given in the Fermi level of the TiO2 at the photoanode provides an electromotive force required to flow electrical current leading to solar hydrogen production from water even without applying external electrical bias.
AB - A new class of molecular-based photoelectrochemical cell for solar hydrogen production consisting of a TiO2-based photoanode modified with a polypyridyl ruthenium photosensitizer (Ru-qpy) and a TiO2-based cathode modified with a platinum porphyrin H2 evolution catalyst has been investigated, showing that the electron accumulation at the conduction band of TiO2 at the photoanode is promoted via electron injection from the Ru-qpy together with hole scavenging by a sacrificial donor. Our study here for the first time unveils that the upward shift given in the Fermi level of the TiO2 at the photoanode provides an electromotive force required to flow electrical current leading to solar hydrogen production from water even without applying external electrical bias.
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U2 - 10.1021/acsaem.8b01992
DO - 10.1021/acsaem.8b01992
M3 - Article
AN - SCOPUS:85064966016
SN - 2574-0962
VL - 2
SP - 987
EP - 992
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 2
ER -
