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

Satoshi Yotsuhashi; Hiroshi Hashiba; Masahiro Deguchi; Yuji Zenitani; Reiko Hinogami; Yuka Yamada; Momoko Deura; Kazuhiro Ohkawa

doi:10.1063/1.4769356

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

Satoshi Yotsuhashi^*, Hiroshi Hashiba, Masahiro Deguchi, Yuji Zenitani, Reiko Hinogami, Yuka Yamada, Momoko Deura, Kazuhiro Ohkawa

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

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.

Original language	English (US)
Article number	042160
Journal	AIP ADVANCES
Volume	2
Issue number	4
DOIs	https://doi.org/10.1063/1.4769356
State	Published - Dec 2012
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1063/1.4769356

Cite this

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abstract = "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.",

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AU - Yotsuhashi, Satoshi

AU - Hashiba, Hiroshi

AU - Deguchi, Masahiro

AU - Zenitani, Yuji

AU - Hinogami, Reiko

AU - Yamada, Yuka

AU - Deura, Momoko

AU - Ohkawa, Kazuhiro

PY - 2012/12

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AB - 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.

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