The reporter recently learned from the University of Science and Technology of China that the School of Chemistry and Materials Science and the National Research Center of Hefei Microscale Material Science, Professor Zeng Jie, used different tin-doped tin disulfide nanosheets as catalysts to achieve high-efficiency electroreduction. Carbon dioxide to formic acid and carbon monoxide. This nickel-doped tin disulfide nanosheet catalyst exhibits high activity and high stability in the reduction of carbon dioxide. This result was recently published in the journal German Applied Chemistry.
In the reduction of carbon dioxide, the activation of carbon dioxide molecules has always been a difficult point in the electrocatalytic reduction of carbon dioxide. Because, under standard conditions, the standard electrode potential required for the activation of carbon dioxide molecules into carbon dioxide anions in aqueous solution is relative standard hydrogen-1.9. Generally, the activation of carbon dioxide molecules involves the transfer of electrons from the catalyst to the carbon dioxide molecules, and this process is closely related to the electronic structure of the catalyst. Therefore, the efficient activation of carbon dioxide molecules can be achieved by adjusting the electronic structure of the catalyst.
Based on this concept, the researchers obtained different nickel-doped tin disulfide nanosheet catalysts by adjusting the content of nickel introduced on the basis of two layers of atomic tin tin sulfide nanosheets. Suitable nickel content of tin disulfide nanometers The catalyst achieves high-efficiency activation of carbon dioxide molecules, thereby enhancing the performance of carbon dioxide electrocatalytic reduction. In the electrocatalytic reduction of carbon dioxide, 5% nickel-doped tin disulfide nanosheets are at a voltage of -0.9 standard hydrogen potential, carbon dioxide The Faraday efficiency of reduction to an effective carbon product is as high as 93%.
This work not only prepared high-efficiency nickel-doped tin disulfide nanosheets as carbon dioxide electroreduction catalysts, but also provided a method for rational design of electrocatalysts.
