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Innovative Energy & Research | ISSN: 2576-1463 | Volume 7
Renewable Energy and Resources
Energy Materials and Fuel Cell Research
2
nd
International Conference on
&
August 27-28, 2018 | Boston, USA
Overall solar water splitting reactor and plant design towards mass production of H
2
and O
2
Taro Yamada
The University of Tokyo, Japan
T
his paper overviews our ongoing research and development in designing the sunlight-driven self-running plant for H
2
+O
2
generation from water as the technical goal of our all-Japan research project ”Japan Technological Research Association
of Artificial Photosynthetic Chemical Process” (ARPChem). Among various principles and real materials for photocatalytic
water splitting, we herein focus on the type of powder photocatalyst from a single light-absorbing material. In this case, H
2
evolution from H
+
and O
2
evolution from OH- in water simultaneously run on a light-responding solid particle generating
carriers therein, by the aid of “co-catalytic” materials dressing the surface. For our benchmark pilot plant, we use SrTiO
3
, the
most developed and successful powder photocatalyst. The original study of stoichiometric 2H
2
+O
2
evolution by ultraviolet
light was performed on SrTiO
3
. Later, Al-doped SrTiO
3
was introduced as an UV-active stoichiometric water splitting single-
powder photocatalyst that realizes a quantum efficiency of 69% at 320 nm by the aid of CrOx+Rh cocatalyst. Because of
the small fraction of UV light within the sunlight, the solar-to-H
2
energetic conversion efficiency is approximately 0.6 %.
Nevertheless this simplicity of water photo-splitting mechanism is a preferable feature in designing solar plants. In this talk we
will further discuss on the design for the photoreactor containing the photocatalyst, inhaling water and exhaling the product
gas mixture. The following processes for safe transportation of explosive 2H
2
+O
2
mixture and operation of H
2
/O
2
separation
membrane will be also generalized.
Biography
Taro Yamada earned his Ph.D. degree at the University of Tokyo in 1984 and since then he occupied professional research scientist’s positions at the Institute
for Solid State Physics/the University of Tokyo, ERATO/JST, Waseda University, RIKEN institute and now is a leading member of Japan Technological Research
Association of Artificial Photosynthetic Chemical Process (ARPChem) at the University of Tokyo. He has published more than 130 scholarly articles in the basic
fields of surface science, catalysis, electrochemistry, and photocatalysis.
t_yamada@chemsys.t.u-tokyo.ac.jpTaro Yamada, Innov Ener Res 2018, Volume 7
DOI: 10.4172/2576-1463-C2-005