Schematic diagram of the enhanced CO2 conversion reaction achieved by the synergistic effect of dual single atom catalysts. Credit: Korea Institute of Materials Science (Kims)
As climate change and the severity of carbon emissions become a global concern, there is an urgent need for technology to convert carbon dioxide (CO2) into resources such as chemical fuels and compounds.韓国材料科学研究所（KIMS）のナノ材料研究部門のDahee Park博士の研究チームは、Kaistの化学科のJeong-Young Park教授のチームと協力して、触媒技術を開発する触媒技術を開発しました. Carbon dioxide (CO2) conversion.
Traditional carbon dioxide (CO2) conversion technologies face commercialization challenges due to their low efficiency compared to high energy consumption. In particular, single-atomic catalysts (SACs) suffer from difficulties in maintaining a complex synthetic process and stable bonding with metal oxide support.これは、触媒粒子を安定化し、耐久性を高めるために重要です。その結果、これらの触媒の性能は限られています。
To overcome these limitations, the research team developed single and dual single atom catalyst (DSAC) technology and introduced simplified processes to increase catalyst efficiency. This achievement utilizes the electronic interaction between the metals of dual single atom catalysts (DSACs), and compared with existing technologies, it is possible to achieve a higher conversion rate and better selectivity (catalysts that induce the production of desired products).能力）を達成します。
This technology includes a catalyst design approach that accurately controls oxygen vacancy and defect structures within metal oxide support, significantly improving the efficiency and selectivity of carbon dioxide (CO2) conversion reactions. Oxygen vacancies promote the adsorption of CO2 on the catalyst surface, while single and double stringed catalysts adsorption of hydrogen (H2).
The combined action of oxygen vacancies, single atoms, and dual single atoms allows for effective conversion of CO2, H2 and the compounds of interest. In particular, dual single atom catalysts (DSACS) utilize the electron interaction between two metal atoms to actively regulate the reaction pathways and maximize efficiency.
The researchers applied aerosol-assisted spray pyrolysis to synthesize catalysts through a simplified process, demonstrating the potential for mass production.このプロセスでは、液体材料をエアロゾル（微細なミスト様粒子）に変換し、それらを加熱チャンバーに導入します。ここでは、複雑な中間ステップを必要とせずに触媒が形成されます。この方法により、金属酸化物のサポート内の金属原子の均一な分散と、欠陥構造の正確な制御が可能になります。
By precisely controlling these defect structures, the team was able to stably form single-single and dual-single-atom catalysts (DSACs). Using DSAC, the use of single-atomic catalysts was reduced by about 50%, achieving more than twice the CO2 conversion efficiency compared to conventional methods, achieving extremely high selectivity of over 99%.
This technology can be applied to a variety of fields, including chemical fuel synthesis, hydrogen production, and clean energy industries. Furthermore, the simplicity of the catalyst synthesis method (aerosol-assisted spray pyrolysis) and high production efficiency make commercialization extremely promising.
“This technology represents a key achievement in enabling commercialization through a simplified process while dramatically improving the performance of CO2 conversion catalysts,” said lead researcher Dr. Dahee Park. It is expected to function as a core technology to achieve neutrality.”
“This study provides a relatively simple method for synthesizing new types of single-atomic catalysts that can be used in a variety of chemical reactions. It also includes the decomposition and utilization of CO2. It provides an important foundation for development. Catalysts are one of the most urgent areas of research to address global warming caused by greenhouse gases.”
Details: Dahee Park et al., Insights into the synergistic effects of double single-atom catalysts on defective CEO2 under CO2 hydrogenation, Applied Catalyst B: Environment and Energy (2024). doi:10.1016/j.apcatb.2024.124987
Quote: Catalyst Systems will be released on February 23, 2025 https://phys.org/2025-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-02-0 Improves CO₂ conversion efficiency for clean energy obtained from .html (February 21, 2025)
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