Plasmon-induced hole-depletion layer on hematite nanoflake photoanodes for highly efficient solar water splitting | |
Department | ERC国家工程研究中心 |
Wang L(王蕾)1; Hu HY(胡红岩)1; Nhat Truong Nguyen2; Zhang YJ(张亚军)1; Patrik Schmuki2,3; 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 | Nano Energy |
ISSN | 2211-2855 |
Volume | 35Pages:171-178 |
Abstract | The efficiency of photoelectrochemical (PEC) water splitting of semiconductors is mainly restricted by the sluggish kinetics of the oxygen evolution reaction dominated by photogenerated holes. Herein, we demonstrate that with the assistance of photon-induced surface plasmon resonance excitation of Au nanoparticles, the iron oxyhydroxides (FeOOH) cocatalysts could serve as a unique " hole-depletion" layer for significantly promoting the PEC performance of single crystalline α-Fe2O3 photoanodes. The photogenerated holes can be efficiently extracted from α-Fe2O3 nanoflake to FeOOH layer, and promptly depleted by the injected hot-electrons from Au nanoparticles, while the hot-holes left behind on Au participate in the oxygen evolution reaction. Accordingly, the synergy of charge separation and hole transfer could be efficiently improved by the surface plasmon excitation on Au nanoparticles. As a result, the photocurrent density for the Fe2O3/FeOOH/Au photoelectrode without additional doping reaches up to 3.2 mA cm-2 at 1.23 VRHE, and 6.5 mA cm-2 at 1.6 VRHE, with a low onset potential of 0.6 VRHE under AM 1.5 G simulated sunlight, which is 2.5 and 5 times higher than for FeOOH modified and pristine α-Fe2O3 photoanodes, respectively. These results thus provide the basic of a new concept and strategy toward the design of more efficient PEC water splitting systems. |
Keyword | Hematite Photoanodes Au Nanoparticles Feooh Plasmon-induced Hole-depletion Layer Solar Water Splitting |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1016/j.nanoen.2017.03.035 |
Funding Organization | the National Natural Science Foundation of China (21622310;21573264;21633013;21603247) |
Indexed By | SCI |
If | 12.343 |
Language | 英语 |
Funding Project | 能源与环境纳米催化材料研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22164 |
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 | Patrik Schmuki; 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 Erlangen Nurnberg, LKO WW4, Dept Mat Sci & Engn, Martensstr 7, D-91058 Erlangen, Germany 3.King Abdulaziz Univ, Dept Chem, Jeddah 80203, Saudi Arabia |
Recommended Citation GB/T 7714 | Wang L,Hu HY,Nhat Truong Nguyen,et al. Plasmon-induced hole-depletion layer on hematite nanoflake photoanodes for highly efficient solar water splitting[J]. Nano Energy,2017,35:171-178. |
APA | Wang L.,Hu HY.,Nhat Truong Nguyen.,Zhang YJ.,Patrik Schmuki.,...&毕迎普.(2017).Plasmon-induced hole-depletion layer on hematite nanoflake photoanodes for highly efficient solar water splitting.Nano Energy,35,171-178. |
MLA | Wang L,et al."Plasmon-induced hole-depletion layer on hematite nanoflake photoanodes for highly efficient solar water splitting".Nano Energy 35(2017):171-178. |
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