Catalytic conversion of carbon dioxide can be carried out at room temperature
Professor Pan Yunxiang from the School of Chemistry and Chemical Engineering at Hefei University of Technology teamed up with researchers from the University of Science and Technology of China and the University of Texas at Austin to successfully develop a performance coating of indium oxide on a 5 nm thick carbon layer. The superior new carbon dioxide conversion photocatalyst provides new research directions and technical methods for controlling carbon dioxide emissions. The research results were recently published in the international academic journal "American Chemical Society".
Carbon dioxide is considered to be the main source of the greenhouse effect. Catalytic conversion is the most promising technology for controlling carbon dioxide emissions. The currently widely used catalytic conversion methods require high-temperature heating of carbon dioxide gas, which, despite having a higher conversion of carbon dioxide, also increases energy consumption and causes additional carbon dioxide emissions. The use of photocatalytic conversion technology to achieve the catalytic conversion of carbon dioxide using solar energy is considered the most green technology.
Researchers found that the carbon layer coated on the surface of indium oxide can promote the transfer of electrons from the catalyst to carbon dioxide, thereby significantly enhancing the adsorption of carbon dioxide on the catalyst. The experimental results show that the carbon layer can effectively enhance the photo-generated charge separation efficiency and increase the number of photo-generated electrons involved in the photocatalytic reaction. At the same time, after coating the carbon layer, protons generated by water decomposition react more easily with carbon dioxide. As a result, a dramatic increase in the efficiency of photocatalytic carbon dioxide conversion has been achieved.
"This result enables the catalytic conversion of carbon dioxide to be carried out directly at room temperature by light irradiation without the need for high-temperature heating." Pan Yunxiang introduced that the product of photocatalytic conversion selectivity is more clear, you can choose to directly convert to a higher purity of carbon monoxide High value-added chemicals such as methane or methanol are used directly. (Reporter Wu Changfeng correspondent Zhou Hui)
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