2020 Fiscal Year Annual Research Report
光触媒的二酸化炭素還元のための共有結合性有機構造体を利用した単一原子触媒の創製
| Project/Area Number |
19J23268
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| Research Institution | Kyoto University |
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Principal Investigator |
李 展召 京都大学, 大学院理学研究科化学専攻, 特別研究員(DC1)
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| Project Period (FY) |
2019-04-25 – 2022-03-31
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| Keywords | nanocrystals / cation exchange / heterostructure / shape memory |
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| Outline of Annual Research Achievements |
In this year, I continued my research program on design and synthesize transition metal single atom catalysts loaded on an appropriate substrate for photocatalytic carbon dioxide reduction. So far we have synthesized various MnS/Cu1.8S nanocrystals (NC) heterostructures in special morphologies and sophisticated compositions. We succeeded in synthesizing different core@shell-like Cu1.8S/MnS heterostructures by partial Mn cations exchange with Cu1.8S nanoplates. These complex NC heterostructures can be used for advanced optoelectronic and catalytic applications, including photocatalytic CO2 reduction.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
We found a shape memory behavior phenomenon during cation exchange reaction.We applied the partial Mn2+ cation exchange (CE) with roxbyite Cu1.8S nanoplates. At the initial stage of the CE, core@shell-like Cu1.8S/MnS heterostructures were obtained. The Cu1.8S-core/MnS-shell NC heterostructures were transformed into the half-hexagonal plate morphology by the progressive decomposition of Cu1.8S part.Those half-hexagonal Cu1.8S/MnS heterostructures was finally rebuilt to full-hexagonal MnS nanoplates by the growth of MnS phase.Such a special “scrap” and “rebuild” process during CE process was also seen for other shaped Cu1.8S NCs like nanorod and nanosphere.
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| Strategy for Future Research Activity |
In a next year, I will summarize the research work of shape memory behavior phenomenon during cation exchange reaction and continue promoting my research program and utilize these nanoheterostructures (Cu1.8S-core/MnS-shell NC, Cu1.8S/MnS-rebuild NC) as photo-responsible units in hybrid photocatalytic system, such as hydrogen evolution or CO2 reduction reaction.
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[Journal Article] Self-activated Rh-Zr Mixed Oxide as a Nonhazardous Cocatalyst for Photocatalytic Hydrogen Evolution2020
Author(s)
T. Nishino, M. Saruyama, Z. Li, Y. Nagatsuma, M. Nakabayashi, N. Shibata, T. Yamada, R. Takahata, S. Yamazoe, T. Hisatomi, K. Domen, and T. Teranishi
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Journal Title
Chem. Sci.
Volume: 11
Pages: 6862-6867
DOI
Peer Reviewed
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