Spatial dual-electric fields for highly enhanced the solar water splitting of TiO2 nanotube arrays | |
Department | OSSO国家重点实验室 |
Cheng X(程翔)1,2; Zhang YJ(张亚军)1; Bi YP(毕迎普)1 | |
The second department | 能源与环境纳米催化材料组 |
2019 | |
Source Publication | Nano Energy |
Volume | 57Issue:-Pages:542-548 |
Abstract | Efficient charge separation is essential for improving the photo-conversion efficiency in both photocatalytic and photoelectrochemical (PEC) water splitting. Herein, we have demonstrated the selective spatial-construction of Au nanolayer and SrTiO3 nanocubes on inner and outer surfaces of TiO2 nanotubes for enhancing the charge separation and PEC activity. More specifically, the outer SrTiO3 nanocubes with a spontaneous ferroelectric polarization could effectively engineer the electrical band bending of TiO2 nanotubes, facilitating hole transfer to the electrode/electrolyte interface for water oxidation. Meanwhile, the inner Au nanolayer with a favorable plasmonic electric-field induced by the visible light promotes charge separation and rapid electron transfer to the counter electrode for hydrogen generation. Benefiting from the spatial dual-electric fields, this SrTiO3/TiO2/Au ternary-photoanode exhibits a significantly enhanced photocurrent density of 2.11 mA cm-2 at 1.23 V (vs. RHE), which is nearly 3.5 times higher than that of the pristine TiO2 nanotube arrays. Additionally, a low onset potential (~0.17 VRHE) for water oxidation as well as an excellent PEC stability has also been achieved. These demonstrations may provide a new strategy toward the rational construction of highly efficient PEC water splitting systems. |
Keyword | Ferroelectric plasmonic TiO2 nanotube water splitting |
Subject Area | 化学 |
MOST Discipline Catalogue | 理学 |
DOI | 10.1016/j.nanoen.2018.12.079 |
URL | 查看原文 |
Indexed By | SCI |
If | 15.548 |
Language | 英语 |
Funding Project | 光催化剂原子间光生电荷迁移及化学价键变化研究 ; 半导体光催化反应过程中电荷迁移直接观测研究 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/26007 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) 精细石油化工中间体国家工程研究中心(ERC) |
Corresponding Author | Bi YP(毕迎普) |
Affiliation | 1.State Key Laboratory for Oxo Synthesis & Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, Gansu, China 2.University of Chinese Academy of Sciences, Beijing 100049, China |
Recommended Citation GB/T 7714 | Cheng X,Zhang YJ,Bi YP. Spatial dual-electric fields for highly enhanced the solar water splitting of TiO2 nanotube arrays[J]. Nano Energy,2019,57(-):542-548. |
APA | Cheng X,Zhang YJ,&Bi YP.(2019).Spatial dual-electric fields for highly enhanced the solar water splitting of TiO2 nanotube arrays.Nano Energy,57(-),542-548. |
MLA | Cheng X,et al."Spatial dual-electric fields for highly enhanced the solar water splitting of TiO2 nanotube arrays".Nano Energy 57.-(2019):542-548. |
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1-s2.0-S221128551830(2340KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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