On the 4th, the reporter learned from Central South University that the team of Professor Liu Min of the school, in collaboration with the Canadian team Professor Edward Sargent and Professor Huang Bingzhao of Taiwan University of Science and Technology, "trapped" carbon dioxide from the metal quantum dots for the first time, increasing the carbon dioxide reduction efficiency by over 200% Greatly improve the carbon recycling efficiency. Related results have been published in the internationally renowned academic journal "Joule". It is reported that the use of electrochemical reduction to reduce carbon dioxide to useful hydrocarbon fuels and chemicals under mild and controllable conditions is an effective way to "capture" carbon dioxide in the atmosphere and solve its recycling. However, the realization of this approach is limited by the difficulty of finding catalysts. Corresponding author Liu Min introduced that there is a class of important low-dimensional semiconductor materials called "quantum dots", which contain a large number of "defect points" that can lead to degradation of photoelectric performance. These "defects" can just improve the catalyst activity. However, this feature is difficult to use in conventional metal catalysts. This time, the tripartite team collaborated to realize the preparation of high-rate metal vacant quantum dots by in-situ electrochemical reduction of sulfide quantum dots, and applied it to the field of carbon dioxide reduction. This quantum dot-derived catalyst maintains the size of 3-5 nanometers, but its metal vacancies are as high as 20%, and it exhibits good atomic level dispersion in metal quantum dots, thus providing a suitable atomic structure for carbon dioxide reduction. With electronic structure. In hundreds of hours of carbon dioxide reduction reaction, it has maintained good catalytic activity, and its performance is more than twice that of existing catalysts. In addition, through verification, this type of catalyst has good universality in a variety of metals, such as gold, silver, copper, lead, etc., and is expected to bring potential applications in the recycling of carbon dioxide. (Reporter Yu Huiyou)
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New method improves carbon dioxide reduction efficiency by 200%