Nguyen Thi Bich Hien Kim, Hyo Young Jeon, Mina Lee, Jin Hee Ridwan, Muhammad Tamarany, Rizcky Yoon, Chang Won 2024-01-20T07:01:02Z 2024-01-20T07:01:02Z 2022-01-10 2015-06 1996-1944 https://pubs.kist.re.kr/handle/201004/125352 For application to ammonia dehydrogenation, novel Ru-based heterogeneous catalysts, Ru-N-C and Ru-C, were synthesized via simple pyrolysis of a mixture of RuCl(3)6H(2)O and carbon black with or without dicyandiamide as a nitrogen-containing precursor at 550 degrees C. Characterization of the prepared Ru-N-C and Ru-C catalysts via scanning transmission electron microscopy, in conjunction with energy dispersive X-ray spectroscopy, indicated the formation of hollow nanocomposites in which the average sizes of the Ru nanoparticles were 1.3 nm and 5.1 nm, respectively. Compared to Ru-C, the Ru-N-C nanocomposites not only proved to be highly active for ammonia dehydrogenation, giving rise to a NH3 conversion of >99% at 550 degrees C, but also exhibited high durability. X-ray photoelectron spectroscopy revealed that the Ru active sites in Ru-N-C were electronically perturbed by the incorporated nitrogen atoms, which increased the Ru electron density and ultimately enhanced the catalyst activity. English MDPI COX-FREE HYDROGEN OXYGEN REDUCTION REACTION PARTICLE-SIZE STORAGE DECOMPOSITION METAL GENERATION HYDROLYSIS INTERFACE GRAPHENE Ru-N-C Hybrid Nanocomposite for Ammonia Dehydrogenation: Influence of N-doping on Catalytic Activity Article 10.3390/ma8063442 1 MATERIALS, v.8, no.6, pp.3442 - 3455 MATERIALS 8 6 3442 3455 scie scopus 000357588900032 2-s2.0-84936817619 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Physics, Applied Physics, Condensed Matter Chemistry Materials Science Metallurgy & Metallurgical Engineering Physics Article COX-FREE HYDROGEN OXYGEN REDUCTION REACTION PARTICLE-SIZE STORAGE DECOMPOSITION METAL GENERATION HYDROLYSIS INTERFACE GRAPHENE Ru-N-C ammonia dehydrogenation N-doping hollow graphitic structure fuel cell