Effect of the graphitic degree of carbon supports on the catalytic performance of ammonia synthesis over Ba-Ru-K/HSGC catalyst

• Published in: Journal of energy chemistry 2014-07, Vol.23 (4), p.443-452
• Main Authors: Jiang, Wei, Li, Ying, Han, Wenfeng, Zhou, Yaping, Tang, Haodong, Liu, Huazhang
• Format: Article
• Language: English
• Subjects: ammonia synthesis; Applied sciences; ball-milling; Catalysis; Catalytic reactions; Chemical industry and chemicals; Chemistry; Exact sciences and technology; General and physical chemistry; graphitic degree; high surface area graphitic carbon materials (HSGCs); Industrial chemicals; supported Ru catalysts; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; 催化剂; 催化性能; 探针反应; 氨合成; 球磨时间; 碳石墨; 纳米颗粒; 高表面积
• ISSN: 2095-4956
• DOI: 10.1016/S2095-4956(14)60170-4

A series of high surface area graphitic carbon materials （HSGCs） were prepared by ball-milling method. Effect of the graphitic degree of HSGCs on the catalytic performance of Ba-Ru-K/HSGC-x （x is the ball-milling time in hour） catalysts was studied using ammonia synthesis as a probe reaction. The graphitic degree and pore structure of HSGC-x supports could be successfully tuned via the variation of ball-milling time. Ru nanoparticles of different Ba-Ru-K/HSGC-x catalysts are homogeneously distributed on the supports with the particle sizes ranging from 1.6 to 2.0 nm. The graphitic degree of the support is closely related to its facile electron transfer capability and so plays an important role in improving the intrinsic catalytic performance of Ba-Ru-K/HSGC-x catalyst.