Highly efficient photochemical HCOOH production from CO2 and water using an inorganic system

Highly efficient photochemical HCOOH production from CO2 and water using an inorganic system

We have constructed a system that uses solar energy to react CO2 with water to generate formic acid (HCOOH) at an energy conversion efficiency of 0.15%. It consists of an AlGaN/GaN anode photoelectrode and indium (In) cathode that are electrically connected outside of the reactor cell. High energy c...

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Veröffentlicht in:AIP advances 2012-12, Vol.2 (4), p.042160-042160-5
Hauptverfasser: Yotsuhashi, Satoshi, Hashiba, Hiroshi, Deguchi, Masahiro, Zenitani, Yuji, Hinogami, Reiko, Yamada, Yuka, Deura, Momoko, Ohkawa, Kazuhiro
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum gallium nitrides
Carbon dioxide
Energy conversion efficiency
Formic acid
Gallium nitrides
Indium
Photosynthesis
Quantum efficiency
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Zusammenfassung:We have constructed a system that uses solar energy to react CO2 with water to generate formic acid (HCOOH) at an energy conversion efficiency of 0.15%. It consists of an AlGaN/GaN anode photoelectrode and indium (In) cathode that are electrically connected outside of the reactor cell. High energy conversion efficiency is realized due to a high quantum efficiency of 28% at 300 nm, attributable to efficient electron-hole separation in the semiconductor's heterostructure. The efficiency is close to that of natural photosynthesis in plants, and what is more, the reaction product (HCOOH) can be used as a renewable energy source.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4769356