光电流
纳米孔
分解水
电解质
材料科学
半导体
光电子学
光电化学
光电化学电池
化学
纳米技术
电化学
电极
光催化
生物化学
物理化学
催化作用
作者
Sang‐Wan Ryu,Yu Zhang,Benjamin Leung,Christopher D. Yerino,Jung Han
标识
DOI:10.1088/0268-1242/27/1/015014
摘要
Nanoporous (NP) GaN was used as a photoanode during photoelectrochemical water splitting and its efficiency and stability were compared with those of planar GaN. The NP GaN showed larger photocurrent density under illumination, which indicated more hydrogen generation. The enhancement was higher for a large applied voltage where the water splitting process was limited by charge transfer between semiconductor and electrolyte. Photocurrents decreased with time during the water splitting; however, the photocurrent degradation was less severe for NP GaN. It was attributed to efficient hole transport from photoanode to electrolyte in NP GaN due to its large surface area.
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