Photo-induced CO2 Reduction with GaN Electrode in Aqueous System
Photo-induced CO2 Reduction with GaN Electrode in Aqueous System
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DOI：
10.1143/apex.4.117101
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发表时间：
2011-10
影响因子：
2.3
通讯作者：
S. Yotsuhashi;M. Deguchi;Y. Zenitani;R. Hinogami;Hiroshi Hashiba;Yuka Yamada;K. Ohkawa
中科院分区：
文献类型：
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作者：
S. Yotsuhashi;M. Deguchi;Y. Zenitani;R. Hinogami;Hiroshi Hashiba;Yuka Yamada;K. Ohkawa
利用氮化镓(GaN)光电极，激发电子在对电极上诱导CO2转化，实现了水和光照条件下CO2的还原。对电极选用铜(铜)板。氮化物半导体的低亲和力和宽禁带使我们能够创建一个电子-空穴对，它具有足够的能量用于二氧化碳还原和水氧化，尽管二氧化碳还原需要高能量。在该体系中，仅光照度就能证实甲酸(HCOOH)的生成具有3%的法拉第效率。
CO2 reduction with water and light illumination is realized using a gallium nitride (GaN) photoelectrode in which excited electrons induce CO2 conversion at the counter electrode. For the counter electrode, a copper (Cu) plate was chosen. The low affinity and wide gap of the nitride semiconductor enable us to create an electron–hole pair which has a sufficient energy for both CO2 reduction and water oxidation, in spite of the fact that a high energy for CO2 reduction is required. Within this system, the generation of formic acid (HCOOH) with 3% Faradic efficiency was confirmed by light illumination alone.