Role of surface defects of carbon nanotubes on catalytic performance of barium promoted ruthenium ca

• 作 者: Yongcheng Ma Guojun Lan Wenzhao Fu Ying Lai Wenfeng Han Haodong Tang Huazhang Liu Ying Li
• 机 构: Institute of Industrial Catalysis,Zhejiang University of Technology,Chaowang Road 18,Hangzhou 310014
• 出 处: 能源化学
• 发表日期: 2020年2期
• 关键词: Carbon nanotubes Ruthenium catalyst Defective carbon Ammonia synthesis

Carbon nanotubes(CNTs)with abundant surface defects are prepared by a liquid oxidation and thermal annealing method.The defective CNTs-D supported Ba-Ru/CNTs-D catalysts exhibit superior catalytic per-formance in ammonia synthesis with a TOF be increased up to 0.30 s-1,which is 2.5 times of oxidized CNTs-O supported Ba-Ru/CNTs-O catalysts and 5 times of the Ba-Ru/CNTs.The characterizations by CO chemisorption,transmission electron microscope,Raman,and X-ray photoelectron spectroscopy revealed that the uniformly well dispersed Ru NPs can be stabilized on the defective sites of CNTs-D.The great improvement of the catalytic performance and stability of the Ba-Ru/CNTs-D is contributed to the strong interaction between Ru NPs and surface defect of the CNTs.