Enhanced Solar Water Splitting by Swift Charge Separation in Au/FeOOH Sandwiched Single-Crystalline Fe2O3 Nanoflake Photoelectrodes | |
Wang L(王蕾)1; Nhat Truong Nguyen2; Zhang YJ(张亚军)1; Bi YP(毕迎普)1; Patrik Schmuki2,3; Bi YP(毕迎普) | |
刊名 | ChemSusChem |
2017 | |
卷号 | 10期号:13页码:2720-2727 |
关键词 | electrocatalysis gold hematite photoelectrodes water splitting |
ISSN号 | 1864-5631 |
通讯作者 | 毕迎普 ; Patrik Schmuki |
英文摘要 | In this work, single crystalline -Fe2O3 nanoflakes (NFs) are formed in a highly dense array by Au seeding of a Fe substrate by a thermal oxidation technique. The NFs are conformally decorated with a thin FeOOH cocatalyst layer. Photoelectrochemical (PEC) measurements show that this photoanode, incorporating -Fe2O3/FeOOH NFs rooted on the Au/Fe structure, exhibits significantly enhanced PEC water oxidation performance compared to the plain -Fe2O3 nanostructure on the Fe substrate. The -Fe2O3/FeOOH NFs on Au/Fe photoanode yields a photocurrent density of 3.1 mA cm−2 at 1.5 VRHE, and a remarkably low onset potential of 0.5–0.6 VRHE in 1 m KOH under AM 1.5G (100 mW cm−2) simulated sunlight illumination. The enhancement in PEC performance can be attributed to a synergistic effect of the FeOOH top decoration and the Au underlayer, whereby FeOOH facilitates hole transfer at the interface of electrode/electrolyte and the Au layer provides a sink for the electron transport to the back contact. This results in a drastically improved charge-separation efficiency in the single crystalline -Fe2O3 NF photoanode. |
学科主题 | 物理化学与绿色催化 |
收录类别 | SCI |
资助信息 | the National Natural Science Foundation of China (21622310;21573264;21633013) |
语种 | 英语 |
WOS记录号 | WOS:000405080200004 |
内容类型 | 期刊论文 |
源URL | [http://210.77.64.217/handle/362003/22103] |
专题 | 兰州化学物理研究所_ERC国家工程研究中心 兰州化学物理研究所_OSSO国家重点实验室 |
通讯作者 | Bi YP(毕迎普) |
作者单位 | 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, Dept Mat Sci & Engn, LKO WW4, Martensstr 7, D-91058 Erlangen, Germany 3.King Abdulaziz Univ, Dept Chem, Jeddah 80203, Saudi Arabia |
推荐引用方式 GB/T 7714 | Wang L,Nhat Truong Nguyen,Zhang YJ,et al. Enhanced Solar Water Splitting by Swift Charge Separation in Au/FeOOH Sandwiched Single-Crystalline Fe2O3 Nanoflake Photoelectrodes[J]. ChemSusChem,2017,10(13):2720-2727. |
APA | Wang L,Nhat Truong Nguyen,Zhang YJ,Bi YP,Patrik Schmuki,&毕迎普.(2017).Enhanced Solar Water Splitting by Swift Charge Separation in Au/FeOOH Sandwiched Single-Crystalline Fe2O3 Nanoflake Photoelectrodes.ChemSusChem,10(13),2720-2727. |
MLA | Wang L,et al."Enhanced Solar Water Splitting by Swift Charge Separation in Au/FeOOH Sandwiched Single-Crystalline Fe2O3 Nanoflake Photoelectrodes".ChemSusChem 10.13(2017):2720-2727. |
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