Carbon-supported Ru catalyst with lithium promoter for ammonia synthesis |
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| Affiliation: | 1. University of Poitiers, CNRS UMR 7285, Institut des Milieux et Materiaux de Poitiers (IC2MP), 4 rue Michel Brunet TSA 51106, 86073, Poitiers Cedex 9, France;2. Chemistry, University of Southampton, Southampton SO17 1BJ, UK;3. WestCHEM, School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, UK;1. National Engineering Research Center of Chemical Fertilizer Catalyst, School of Chemical Engineering, Fuzhou University, Fujian,350002, China;2. Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China;3. National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen University, Xiamen, 361005, China;4. Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, United States;1. Department of Materials and Life Science, Faculty of Science and Technology, Seikei University, 3-3-1 Kichijoji-kitamachi, Musashino-shi, Tokyo, 180-8633, Japan;2. Department of Chemical Engineering, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan |
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| Abstract: | The electronegativity of Li is much higher than that of Na or K, but the ammonia synthesis activities of Li-promoted Ru/AC catalysts were comparable to the values of Ru catalyst promoted with K, which were much higher than those over Ru catalyst with Na promoter. The presence of Li increased the catalytic activity by changing the chemisorption properties such as hydrogen adsorption and nitrogen adsorption for carbon-supported Ru catalysts, rather than affecting the sizes of Ru particles or the electron density of Ru metal. |
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