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• W2576809031 endingPage "2276" @default.
• W2576809031 startingPage "2267" @default.
• W2576809031 abstract "Ruthenium is a promising low-temperature catalyst for Fischer–Tropsch synthesis (FTS). However, its scarcity and modest specific activity limit its widespread industrialization. We demonstrate here a strategy for tuning the crystal phase of catalysts to expose denser and active sites for a higher mass-specific activity. Density functional theory calculations show that upon CO dissociation there are a number of open facets with modest barrier available on the face-centered cubic (fcc) Ru but only a few step edges with a lower barrier on conventional hexagonal-closest packed (hcp) Ru. Guided by theoretical calculations, water-dispersible fcc Ru catalysts containing abundant open facets were synthesized and showed an unprecedented mass-specific activity in the aqueous-phase FTS, 37.8 molCO·molRu–1·h–1 at 433 K. The mass-specific activity of the fcc Ru catalysts with an average size of 6.8 nm is about three times larger than the previous best hcp catalyst with a smaller size of 1.9 nm and a higher specific surface area. The origin of the higher mass-specific activity of the fcc Ru catalysts is identified experimentally from the 2 orders of magnitude higher density of the active sites, despite its slightly higher apparent barrier. Experimental results are in excellent agreement with prediction of theory. The great influence of the crystal phases on site distribution and their intrinsic activities revealed here provides a rationale design of catalysts for higher mass-specific activity without decrease of the particle size." @default.
• W2576809031 created "2017-01-26" @default.
• W2576809031 creator A5024361949 @default.
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• W2576809031 creator A5035180123 @default.
• W2576809031 creator A5045398749 @default.
• W2576809031 creator A5047021453 @default.
• W2576809031 creator A5055160391 @default.
• W2576809031 creator A5055781053 @default.
• W2576809031 creator A5055822249 @default.
• W2576809031 creator A5077976698 @default.
• W2576809031 creator A5083885267 @default.
• W2576809031 date "2017-02-02" @default.
• W2576809031 modified "2023-10-14" @default.
• W2576809031 title "Chemical Insights into the Design and Development of Face-Centered Cubic Ruthenium Catalysts for Fischer–Tropsch Synthesis" @default.
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