Recently, the Key Laboratory of Low Carbon Conversion Science and Engineering of the Chinese Academy of Sciences and the Shanghai High-Tech Research Institute-Shanghai University of Science and Technology Joint Laboratory of Low Carbon Energy have made important progress in the electrocatalytic reduction and conversion of carbon dioxide (CO2) to formic acid and ethanol. Related results Published in the internationally renowned journal "German Applied Chemistry".
Modern society consumes a large amount of fossil fuels such as coal, oil, and natural gas. As a result, greenhouse gas emissions such as CO2 increase drastically, triggering increasingly severe global environmental problems. In this regard, through electrocatalytic CO2 conversion has become a feasible way: using renewable wind energy, solar energy and other clean electrical energy as energy, under the normal temperature and pressure conditions, CO2 is directly converted into carbon monoxide, formic acid, methanol and other fuels and chemicals. , and to achieve the use of CO2 resources and the effective storage of clean electrical energy, showing great potential applications.
However, how to efficiently obtain high value-added chemicals is a very challenging hot topic in the research of CO2 electrocatalytic conversion.
After nearly two years of continuous exploration, the working team of Chen Wei selected and tried a large number of metal and alloy catalysts. Eventually, the Pd-Sn alloy catalyst composed of metallic palladium (Pd) and tin (Sn) was found to have excellent performance. By applying a very low voltage, the catalyst can use 99% of the input electrical energy to drive CO2 conversion to produce high value-added chemicals, formic acid. Formic acid is one of the basic organic chemical raw materials and is widely used in industries such as pesticides, leather, dyes, medicine and rubber. In this study, CO2 was used as a raw material, and formic acid was efficiently synthesized using renewable electric energy, showing a good application prospect.
In addition, the conversion of CO2 into electrocatalytic products to produce products containing two (or more) carbon atoms, such as ethylene, ethanol, etc., is very difficult, and it is also a key target in the industry. Based on previous research on nano-carbon materials, the research team developed a nitrogen-doped mesoporous carbon (N-carbon) material for electrocatalytic CO2 conversion. By regulating the pore structure and surface active site configuration of N-carbon, CO2 was directly converted to ethanol. Ethanol is one of the most widely used basic chemicals and is used in the synthesis of acetic acid, beverages, flavors, dyes, and fuels. The industry has great prospects.
This research work provides new ideas for the design and creation of electrocatalytic systems with high activity and selectivity for the production of multi-carbon products, and is highly valued by reviewers of Applied Chemistry in Germany. (Reporter Shen Zexi)
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