2002
DOI: 10.1016/s0021-9517(02)93724-3
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Graphitic Nanofilaments as Novel Support of Ru–Ba Catalysts for Ammonia Synthesis

Abstract: A novel graphitic-nanofilament-(GNF-) supported Ru-Ba catalyst is prepared and used in ammonia synthesis reaction. The RuBa/GNFs catalyst shows remarkably high activity and stability for ammonia synthesis, which can be attributed to high purity and graphitization of GNFs with unique structure. TEM micrographs of the Ru-Ba/GNFs catalysts show that Ru metal particles uniformly disperse on the outer wall of GNFs, and the particles become bigger than that before ammonia synthesis reaction after 50 h of operation a… Show more

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Cited by 90 publications
(4 citation statements)
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“…Improvement in the catalytic activity of Ru-based ammonia synthetic catalysts by the addition of Ba species has been reported and, in most cases, is attributed to a high dispersion of Ru nanoparticles on the particle surfaces. 13,17,18,22 However, no such effect was observed in Ru/BaO−CaH 2 . Next, the macroscopic morphology of Ru/BaO−CaH 2 was studied using backscattered electron (BSE) imaging and EDX.…”
Section: Resultsmentioning
confidence: 94%
“…Improvement in the catalytic activity of Ru-based ammonia synthetic catalysts by the addition of Ba species has been reported and, in most cases, is attributed to a high dispersion of Ru nanoparticles on the particle surfaces. 13,17,18,22 However, no such effect was observed in Ru/BaO−CaH 2 . Next, the macroscopic morphology of Ru/BaO−CaH 2 was studied using backscattered electron (BSE) imaging and EDX.…”
Section: Resultsmentioning
confidence: 94%
“…Finally, clusters 6 , 8 and 9 are characterized by a higher decomposition temperature. Therefore, the selected low activation temperature could adversely influence their catalytic activity together with residues from the functionalization arm (Cl, S, O, P) [59]. Thus, there is room for improvement of the catalytic performance by optimizing the thermal activation pretreatment.…”
Section: Resultsmentioning
confidence: 99%
“…[136] Carbons supports such as carbon nanotubes, [137] activated carbon (AC), [138][139][140][141] mesoporous carbon (MC), [142] and graphitic nitrides (GN). [143,144] were widely studied for NH 3 synthesis. Carbon materials are potentially excellent supports due to the uniform dispersion of Ru nanoparticle, but activity extremely dependent on synthesis strategy, porosity, surface area and surface functional groups.…”
Section: Carbon Supportmentioning
confidence: 99%