光电流
纳米片
材料科学
过电位
原子层沉积
面(心理学)
可逆氢电极
退火(玻璃)
分解水
析氧
化学工程
纳米技术
光电子学
图层(电子)
电极
化学
电化学
催化作用
物理化学
光催化
复合材料
工作电极
工程类
五大性格特征
社会心理学
人格
生物化学
心理学
作者
Linxing Meng,Cheng Cheng,Run Long,Wei Wang,Shengnan Li,Wei Tian,Liang Li
标识
DOI:10.1016/j.scib.2022.07.003
摘要
The severe bulk recombination and sluggish oxygen evolution reaction (OER) dynamics of photoanodes severely restrict the application of photoelectrochemical (PEC) devices. To solve these two problems, crystallographic facet orientation and cocatalyst emergence with a high-quality photoanode/cocatalyst interface were realized through an air annealing-assisted strategy to treat atomic layer deposition (ALD)-modified SnS2 nanosheet arrays. Based on experimental observations and theoretical calculations, the reduced (001) crystal facet of SnS2 decreases the recombination of photogenerated carriers in the bulk and improves the carrier separation of the photoanode. Moreover, the unexpectedly formed ZnTiOxSy film decreases the overpotential of the surface OER, reduces interface recombination, and extends the carrier lifetime. These synergistic effects lead to significantly enhanced PEC performance, with a high photocurrent density of 1.97 mA cm-2 at 1.23 V vs. reversible hydrogen electrode (RHE) and a low onset potential of 0.21 V vs. RHE, which are superior to reported mostly SnS2-based photoanodes.
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