Sulfide cadmium selenide alloy nanorods electrocatalytic reduction of carbon dioxide synthesis gas diagram
Recently, the University of Science and Technology of China, Hefei Microscale Physical Sciences National Research Center, Professor of Chemistry and Materials Science Zeng Jie research group with adjustable components of sulfur-selenide cadmium alloy nanorods as a catalyst, high efficiency electrical reduction of carbon dioxide into syngas. The catalyst of the kind of the barium sulphate cadmium selenide alloy nanorods shows high activity and high stability in the carbon dioxide electroreduction reaction and can control the composition ratio of the syngas over a wide range.
Syngas, a mixture of carbon monoxide and hydrogen, is an important synthetic feedstock in the petrochemical industry, and the optimal compositional ratios of the syngas required in different chemical processes vary accordingly. Conventional methods for the synthesis of syngas include the gasification of coal And natural gas reforming all consume nonrenewable energy sources.Using carbon dioxide and water as feedstock to electrically reduce carbon dioxide in aqueous solution is an ideal method for the sustainable production of syngas but it is very difficult for current catalysts for the reduction of carbon dioxide to guarantee high Current density at the same time, a wide range of regulated synthesis gas composition ratio.
Accordingly, the researchers used liquid phase synthesis technology, design and synthesis of components adjustable CdS alloy nanorods catalyst.The researchers found that the higher the selenium content of the catalyst, the reaction of hydrogen intermediate, the more , The higher the proportion of hydrogen components in the syngas product.The results show that the ratio of carbon monoxide to hydrogen in the product syngas can be freely adjusted between 4: 1 and 1: 4 at overpotential of -1.2 V. Simultaneously , No matter what kind of composition of the syngas, the current density of more than 25mA / cm-2 in the continuous use of the catalyst stability test for 10 hours, the current density remained stable, the composition of the product syngas is basically the same no change.
Relevant research results published in the "Advanced Materials", doctoral student Ho Rong, Master Zhang An as co-author of this research has been the CAS Key Research Program of Frontier Science, National Major Scientific Research Project, the National Natural Science Foundation of Education Ministry of funding.
