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This recycle of CO2 in a highly efficient manner can not only slow the global warming but also produce CO that can be further converted into other valuable fuesls for relative chemical industry. The exceptional results of their study have been published on June 14 of this year (2019) in global top journal《Science》.
The research team formed by Prof. Hao-Ming Chen from the Department of Chemistry at NTU and Prof. Xile Hu from Swiss Federal Institute of Technology Lausanne and their group members has spent three years through using both “Taiwan Light Source” and “Taiwan contracted beamline at Japan’s synchrotron radiation facility (SPring-8)” of the NSRRC in utilizing “Operando X-ray absorption spectroscopy” technology for real-time observation of the catalytic valence and chemical environment during the electrochemically CO2 reduction into CO. The result successfully reveals a new low cost catalyst and mades a breakthrough that has attracted global attention.
This is the state-of-the-art catalyst with the best conversion efficiency and even superior to those of the precious metals. In this study, a critical problem why this catalyst can perform the best activity among all the state-of-the-art catalysts is raised. In order to realize the key mystery of such high conversion efficiency, Prof. Chen utilized the beamlines of NSRRC in Taiwan and Japan in combination with the operando X-ray absorption spectroscopy technology developed by Prof. Chen’s group in recent years. They evidently clarified that the key is to stabilize the active site in +3 state during the CO2 reduction.
It’s worth mentioning that the new single-atom iron catalyst can recycle CO2 in a high-efficient and cost-effective manner with producing CO. The produced CO can be further converted into hydrocarbons to create fuels, plastics, and other materials. This kills two birds with one stone as it can reduce the amount of substances causing global warming and can produce fuels. Prof. Chen states that future diections will attempt to use solar energy as a replacement for generating electricity toward the CO2 reduction reaction. This will achieve the goal of “artificial photosynthesis”, a massive milestone in modern technology.
Many exceptional research results have been produced over the past 20 years from both Taiwan’s and Japan’s synchrotron radiation beamlines of NSRRC. “Taiwan Photon Source” activated in 2016 is currently one of the brightest light sources in the world, where many beamlines are constructed for the research in the relative fields of green energy and biomedicine. In the future, this will assist the top domestic and foreign scientists in producing countless breakthroughs in research.
NSRRC stated that in recent years, operando X-ray absorption spectroscopy technology has been broadly applied in the fields of catalysis and electrochemistry to clearly understand the electronic and atomic structures of the catalytic manners during the chemical reactions. Prof. Chen used this key technique to successfully reveal the key of maintaining the single-atom iron in a high oxidation state. This is a new discovery on a global scale.
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