2022 Fiscal Year Research-status Report
Systematic heterogeneous design of Cu catalysts for CO2 electroreduction towards highly value-added products
| Project/Area Number |
21K14721
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| Research Institution | Kyushu University |
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Principal Investigator |
Song Juntae 九州大学, 工学研究院, 助教 (10865348)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | electrocatalyst / CO2 reduction / MOF / Bi catalysts |
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| Outline of Annual Research Achievements |
As this project aims to achieve efficient electrocatalysts for CO2 reduction with strategies using porous materials as supporting materials to boost total CO2 conversion. Up to now, we established high CO2 conversion with Zr-MOF support for Bi catalyst to generate formic acid production.
In detail, as we successfully coupled UiO-66 with Bi particles, we deeply investigated the reason for the improvement in this research period. According to Raman, XPS and FTIR analysis, carbonate concentration should be increased at Zr site, resulting in higher CO2 utilization for Bi catalysts.
However, we still have challenging issues regarding the stability. Due to Zr-MOF's structural evolution under strong alkaline condition, as the electrolysis time goes, CO2-reducing current density is gradually decreased. Thus, we are on-going to solve the stability and make clear the specific reason for improved activity.
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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
After changing the strategy with MOF supporting materials due to failure with Cu catalysts on boron carbon nitride, we successfully demonstrated the improved CO2 conversion with Bi catalysts. Even though it is not firstly planned, it is also significant for design principal of electrocatalyst with high CO2 conversion. In the final year of research, I will continue to clarify not only the mechanism, but also apply same strategy for multi-carbon production.
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| Strategy for Future Research Activity |
In the next phase, the efforts to explain why CO2 conversion rate is increased with Zr-MOF will be carried out with model catalyst like Bi/ZrO2. Due to the unstability of MOF structure during electrolysis, I will focus on the catalysts surface with in situ spectroscopic technology (Raman). Then, to expand the application, I will also continue to find new catalysts materials to produce highly value-added chemicals (C2+) with Cu, Ni, etc.
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| Causes of Carryover |
We still have enough materials for catalyst synthesis. Accordingly, some amount of budgets are remained to be used next fiscal year. In the next year, it will be used for buying additional chemicals, presentation in international conference, etc.
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