Effect of nitrogen co-doping with ruthenium on the catalytic performance of Ba/Ru-N-MC catalysts for ammonia synthesis

Yongcheng Ma; Guojun Lan; Xiaolong Wang; Geshan Zhang; Wenfeng Han; Haodong Tang; Huazhang Liu; Ying Li

doi:10.1039/c9ra03097b

Effect of nitrogen co-doping with ruthenium on the catalytic performance of Ba/Ru-N-MC catalysts for ammonia synthesis

RSC Adv. 2019 Jul 16;9(38):22045-22052. doi: 10.1039/c9ra03097b. eCollection 2019 Jul 11.

Authors

Yongcheng Ma¹, Guojun Lan¹, Xiaolong Wang¹, Geshan Zhang¹, Wenfeng Han¹, Haodong Tang¹, Huazhang Liu¹, Ying Li¹

Affiliation

¹ Institute of Industrial Catalysis, Zhejiang University of Technology Chaowang Road 18 Hangzhou China liying@zjut.edu.cn.

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.