Lab of Clean Energy & Environmental Catalysis, School of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601, China.
National Synchrotron Radiation Laboratory, Collaborative Innovation Center of Chemistry for Energy Materials, University of Science & Technology of China, Hefei, Anhui, 230029, China.
Small. 2017 Mar;13(10). doi: 10.1002/smll.201602420. Epub 2016 Dec 27.
TiO -based photoanodes have attracted extensive attention worldwide for photoelectrochemical (PEC) water splitting, but these materials still suffer from poor electron-hole separation and low photoconversion efficiency. Here, the high PEC water splitting activity and long-term stability against photocorrosion of well-aligned hierarchical TiO @CoNi-layered double hydroxides nanotube arrays (TiO @CoNi-LDHs NTAs) are reported. The typical TiO @CoNi-LDHs NTAs exhibits enhancing photocurrent density of 4.4 mA cm at a potential of 1.23 V (vs reversible hydrogen electrode) under AM 1.5G simulated sunlight (100 mW cm ), 3.3 times higher than that of the pristine TiO sample. Moreover, this hierarchical electrode displays excellent stability against photocorrosion with initial activity loss no more than 1.0% even after 10 h irradiation in Na SO electrolyte solution (pH 6.8), much competitive to those reported TiO -based photoelectrodes. This work may offer a combinatorial synthesis strategy for the preparation of hierarchical architectures with high PEC performances.
基于 TiO 的光阳极在光电化学（PEC）水分解方面引起了全球广泛关注，但这些材料仍存在电子-空穴分离差和光转化效率低的问题。本文报道了具有良好取向的分级 TiO@CoNi-层状双氢氧化物纳米管阵列（TiO@CoNi-LDHs NTAs）的高 PEC 水分解活性和抗光腐蚀性的长期稳定性。典型的 TiO@CoNi-LDHs NTAs 在 AM 1.5G 模拟太阳光（100 mW cm）下，在 1.23 V（相对于可逆氢电极）的电位下表现出增强的光电流密度为 4.4 mA cm，比原始 TiO 样品高 3.3 倍。此外，该分级电极在 NaSO 电解质溶液（pH 6.8）中照射 10 h 后，其初始活性损失不超过 1.0%，具有出色的抗光腐蚀性，比报道的那些基于 TiO 的光电极更具竞争力。这项工作可能为制备具有高 PEC 性能的分级结构提供了一种组合合成策略。
