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Comparative Study of Rubidium and Cesium as Promoters in Carbon-supported Ruthenium Catalysts for Ammonia Synthesis |
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| Authors: | Yu. V. Larichev D. A. Shlyapin P. G. Tsyrul’nikov V. I. Bukhtiyarov |
| Affiliation: | 1. Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia 2. Institute of Hydrocarbons Processing, Omsk, 644040, Russia 3. Novosibirsk State University, Novosibirsk, 630090, Russia |
| Abstract: | Sibunit-supported Ru-catalysts promoted with cesium or rubidium compounds have been comparatively studied with XPS. The cesium promoter interacts both with support and with active component. The absence of the promoter–support interaction in the case of rubidium provides a stronger interaction between promoter and active component compared to the cesium-based catalysts. These differences in the promoter–support and promoter–metal interactions are exhibited when a sequence of ruthenium and alkali introduction are changed. |
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