| Project/Area Number |
21J15848
|
|---|
| Research Category |
Grant-in-Aid for JSPS Fellows
|
| Allocation Type | Single-year Grants |
|---|
| Section | 国内 |
|---|
| Review Section |
Basic Section 28030:Nanomaterials-related
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
LI HAN 京都大学, 理学研究科, 特別研究員(DC2)
|
|---|
| Project Period (FY) |
2021-04-28 – 2023-03-31
|
| Project Status |
Completed (Fiscal Year 2022)
|
| Budget Amount *help |
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2022: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2021: ¥800,000 (Direct Cost: ¥800,000)
|
|---|
| Keywords | Cu2-xSeyS1-y / plasmon / band engineering / water oxidation / hot carriers / Fermi level / electric field / crystal structure / chemical composition / copper vacancy |
|---|
| Outline of Research at the Start |
Current photoelectrocatalysis toward water splitting has the major drawbacks of solar light utilization only in UV-Vis region and low charge separation efficiency. Thus, the applicant proposes the novel plasmonic PEC device with response to Vis-IR-light to improve the charge separation efficiency and charge mobility by rational engineering of photoelectrode heterostructures based on optimized interfaces at CuSeS/CdS p-n heterojunction and CdS/SS ohmic contact. This novel photoelectrode material has much lower cost and higher efficiency of long-lived charge separation.
|
| Outline of Annual Research Achievements |
In 2022, we designed a plasmonic photoelectrode comprising Cu2-xSeyS1-y and CdS for Near-Infrared (NIR)light driven water oxidation. We evaluated the performance of the photoelectrodes with band engineering of Cu2-xSeyS1-y which resulted in the optimized interfacial electric field between CdS and Cu2-xSeyS1-y. Cu2-xSeyS1-y with a deep fermi level (EF) showed good photoelectrocatalytic Oxygen evolution reaction (OER) activity under NIR light. We illustrated the hot carriers transfer by the transient absorption spectroscopy. Finally, we found that the band engineering of Cu2-xSeyS1-y controlled the NIR-induced photoelectrocatalytic OER. It was revealed that not only the deeper EF position but also the stronger interfacial electric field contributed to the photoelectrocatalytic OER.
|
| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
|
| Strategy for Future Research Activity |
令和4年度が最終年度であるため、記入しない。
|
