Removal of Hydrogen Poisoning by Electrostatically Polar MgO Support for Low-Pressure NH3 Synthesis at a High Rate over the Ru Catalyst
| Autor: | Georg Held, Alex Large, Jiaying Mo, David C. Grinter, Simson Wu, Tianyi Chen, Yung-Kang Peng, Ian J. McPherson, Shik Chi Edman Tsang, Federica Venturini, Hung-Lung Chou, Ian Wilkinson, Pilar Ferrer Escorihuela |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen 010405 organic chemistry business.industry chemistry.chemical_element General Chemistry 010402 general chemistry 01 natural sciences Catalysis Nanomaterial-based catalyst 0104 chemical sciences Renewable energy Ammonia production chemistry Chemical engineering Polar business |
| Zdroj: | ACS Catalysis. 10:5614-5622 |
| ISSN: | 2155-5435 |
| Popis: | The increasing availability of low-cost and low pressure, renewable H2 from wind and solar means has triggered tremendous interest in developing low pressure ammonia synthesis with N2 as the energy carrier as well as fertilizer. As such, Cs-promoted Ru/MgO catalysts used in the Kellogg process show superiority to Fe-based catalysts at milder conditions; however, as known, the surface poisoning of Ru sites by competitive strong H2 dissociative adsorption limits the overall rate. In this study, it is demonstrated that the use of simple electrostatically polar MgO(111) to replace nonpolar MgO as the support can significantly alleviate the hydrogen poisoning and facilitate an unprecedented ammonia production rate by its high intrinsic proton capture ability. |
| Databáze: | OpenAIRE |
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