One-dimensional hematite photoanodes with spatially separated Pt and FeOOH nanolayers for efficient solar water splitting | |
Department | ERC国家工程研究中心 |
Wang L(王蕾)1; Yang, Yang2; Zhang YJ(张亚军)1; Rui, Qiang1; Zhang, Beibei1; Shen ZQ(沈志强)1; Bi YP(毕迎普)1; Bi YP(毕迎普) | |
The second department | osso国家重点实验室 |
2017 | |
Source Publication | Journal of Materials Chemistry A |
ISSN | 2050-7488 |
Volume | 5Issue:32Pages:17056-17063 |
Abstract | Charge separation plays a crucial role in determining the solar energy conversion efficiency of semiconductors for photoelectrochemical (PEC) water splitting. However, owing to the intrinsically high electron–hole recombination, the generally reported PEC performance is still far below that expected. Therefore, we have attempted to demonstrate that efficient charge separation can be achieved on the selective growth of spatial FeOOH cocatalyst and Pt nanoparticles on hematite photoanodes. Unlike traditional strategies – single cocatalyst decoration or element doping – this comprises an interfacial hole-transfer layer as the active sites (FeOOH) for water oxidation, and an electron collector and transfer layer (Pt) to facilitate water reduction. Here we demonstrate a simple but effective “bottom-up” method, combined metallic replacement with hydrolytic reactions, for the selective growth of the FeOOH cocatalyst (top) and Pt particles (bottom) on the hematite-nanoflake (NF) photoanodes. As expected, this novel FeOOH/α-Fe2O3 NF/Pt photoanode yields excellent photoresponse behavior for PEC water splitting reactions −2.0 mA cm−2 and 3.2 mA cm−2 obtained at 1.23 VRHE and at 1.5 VRHE under AM 1.5G illumination – which is much higher than the pristine hematite and/or exclusively FeOOH cocatalyst-decorated samples. These results demonstrate that selectively integrating electron and hole-transfer layers into photoanodes could effectively achieve spatial charge separation and greatly improve PEC performance for water splitting. |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1039/c7ta05318e |
Funding Organization | the National Science Foundation of China (21622310;21573264;21633013) |
Indexed By | SCI |
If | 8.867 |
Language | 英语 |
Funding Project | 能源与环境纳米催化材料研究组;日常管理与大型仪器组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22426 |
Collection | 精细石油化工中间体国家工程研究中心(ERC) 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Bi YP(毕迎普) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Natl Engn Res Ctr Fine Petrochem Intermediates, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China 2.Univ Cent Florida, Dept Mat & Engn, NanoSci Technol Ctr, Orlando, FL 32826 USA |
Recommended Citation GB/T 7714 | Wang L,Yang, Yang,Zhang YJ,et al. One-dimensional hematite photoanodes with spatially separated Pt and FeOOH nanolayers for efficient solar water splitting[J]. Journal of Materials Chemistry A,2017,5(32):17056-17063. |
APA | Wang L.,Yang, Yang.,Zhang YJ.,Rui, Qiang.,Zhang, Beibei.,...&毕迎普.(2017).One-dimensional hematite photoanodes with spatially separated Pt and FeOOH nanolayers for efficient solar water splitting.Journal of Materials Chemistry A,5(32),17056-17063. |
MLA | Wang L,et al."One-dimensional hematite photoanodes with spatially separated Pt and FeOOH nanolayers for efficient solar water splitting".Journal of Materials Chemistry A 5.32(2017):17056-17063. |
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