Effect of nitrogen co-doping with ruthenium on the catalytic performance of Ba/Ru–N-MC catalysts for ammonia synthesis |
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Authors: | Yongcheng Ma Guojun Lan Xiaolong Wang Geshan Zhang Wenfeng Han Haodong Tang Huazhang Liu Ying Li |
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Affiliation: | Institute of Industrial Catalysis, Zhejiang University of Technology, Chaowang Road 18, Hangzhou China, |
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Abstract: | Nitrogen co-doping with ruthenium mesoporous carbons (Ru–N-MC) was prepared by co-impregnation of sucrose and urea on a RuCl3/SiO2 template followed by a thermal carbonization process. The turnover frequency (TOF) of the Ba/Ru–N-MC catalyst in ammonia synthesis is 0.16 s−1 under reaction conditions of 400 °C, pressure of 10 MPa and space velocity of 10 000 h−1. The superior catalytic performance of the Ba/Ru–N-MC is proposed to originate from the strong metal-support interaction between Ru nanoparticles (NPs) and carbon support. In addition to the activity, the Ba/Ru–N-MC catalyst exhibits a long-term stability for 35 h without significant deactivation.A highly active and stable mesoporous Ba/Ru–N-MC catalyst for ammonia synthesis was prepared by an in situ thermal carbonization method with nitrogen co-doping with ruthenium NPs. |
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