New catalyst realizes high-efficiency conversion of carbon dioxide

Science and Technology Daily News? (Reporter Hao Xiaoming) The greenhouse gas carbon dioxide (CO2) is the final product of many chemical reactions, and its excessive emissions will exacerbate the global average temperature rise and bring huge pressure on the ecological environment
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How to efficiently convert and utilize CO2 is a hot and difficult point in the field of energy and chemical industry
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The reporter learned from the Dalian Institute of Chemical Physics, Chinese Academy of Sciences on April 23 that the team of researcher Deng Dehui and the team of Professor Wang Ye of Xiamen University have used the sulfur-rich vacancy-rich few-layer molybdenum disulfide for the first time in the research of CO2 catalytic hydrogenation to methanol.
MoS2) catalyst realizes low-temperature, high-efficiency and long-life catalytic CO2 hydrogenation to methanol
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The research lasted for nearly 6 years, and the activity and selectivity of the MoS2 catalyst were significantly better than that of the metal oxide catalyst, showing excellent stability, which opened up a new way to realize low energy consumption and high efficiency CO2 conversion and utilization
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Relevant research results have been published in "Nature Catalysis", with the topic of "Unusual Vacancy Catalysis", an expert review article was published, giving high praise to the research
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Renewable energy-based green hydrogen (H2) reaction to produce methanol is one of the important ways to turn CO2 waste into treasure
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Generally, traditional metal oxide catalysts require a reaction temperature of more than 300 degrees Celsius, and are often accompanied by severe reverse water gas shift reactions, resulting in the production of a large number of by-products-carbon monoxide
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"The introduction of transition metal components in the metal oxide catalyst can promote the activation of H2 and reduce the reaction temperature, but it is easy to cause excessive hydrogenation of CO2 to produce methane, thereby reducing the selectivity of the target product methanol
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" said a researcher from the Dalian Institute of Chemical Technology, CO2 There is an urgent need to find a new catalyst system for low-temperature high-efficiency hydrogenation to methanol
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It is worth mentioning that in a small laboratory test, the single-pass conversion rate of CO2 at 180 degrees Celsius can reach 12.
5%, and the selectivity of methanol is as high as 94.
3%, which is significantly better than the previously reported traditional catalysts such as metals and metal oxides.
The performance can also be stably maintained for 3000 hours without attenuation, showing excellent industrial application potential
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Felix Studt, a professor at Karlsruhe Institute of Technology in Germany, said that efficient conversion and utilization of CO2 is an important part of achieving carbon peak and carbon neutrality.
The study revealed the application potential of sulfur vacancies in two-dimensional MoS2 in catalytic reactions.
The development of new CO2 hydrogenation catalysts provides new ideas and is expected to bring huge efficiency improvements to the industrial application of carbon dioxide hydrogenation to methanol
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