The kinetics of H2 adsorption on supported ruthenium catalysts

Lin, Hsin; Chen, Yu Wen

doi:10.1016/j.tca.2004.03.007

Cited by 60 publications

(32 citation statements)

References 17 publications

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“…The medium temperature peaks in the range of 150-300°C were significantly different over various samples. Lin and Chen [44] also found the hydrogen desorption peak located at around 325°C for Ru/Al 2 O 3 and 200°C for Ru/TiO 2 , they attributed this peak to the hydrogen spillover from Ru metal to the support. However, the amount of adsorbed hydrogen in this temperature region would not increase by addition of Al 2 O 3 (Fig.…”

Section: H 2 -Tpd Study Of Unpromoted Ru/al 2 O 3 Catalystsmentioning

confidence: 93%

“…3, 4 and 5, indicating the presence of three or more types of hydrogen species on Ru/Al 2 O 3 catalysts. The low temperature peak below 150°C usually was assigned to hydrogen (H a ) chemisorbed on the surface of Ru particles [44,45]. For helping to distinguish the types of hydrogen species, a H 2 -TPD study was carried out over the alumina-diluted Ru/Al 2 O 3 catalyst (0.2 g Ru/Al 2 O 3 -P and 0.1 g alumina).…”

Section: H 2 -Tpd Study Of Unpromoted Ru/al 2 O 3 Catalystsmentioning

confidence: 99%

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Effect of Chlorine on the Chemisorptive Properties and Ammonia Synthesis Activity of Alumina-Supported Ru Catalysts

et al. 2011

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A series of Ru/Al 2 O 3 catalysts were prepared to study the effect of the amount and the origin of residual chlorine on chemisorptive property and the ammonia synthesis activity. The catalysts were characterized by X-ray fluorescence, CO chemisorption, transmission Electron Microscopy, X-ray photoelectron spectroscopy, hydrogen temperature-programmed desorption, hydrogen temperature-programmed reduction. It is found that the presence of chlorine had a limited impact on Ru particle size. Residual chlorine originated from RuCl 3 would not influence on Ru 3d 5/2 binding energy, but chlorine from HCl solution significantly increased Ru 3d 5/2 binding energy. Regardless of their source, the presence of chlorine severely reduced the amount of hydrogen species corresponding to the desorption peak at medium temperature. The inhibition effect of chlorine on hydrogen adsorption was more strong for Ru catalyst with residual chlorine from the RuCl 3 precursor. With a similar amount of residual chlorine, the catalysts with chlorine originated from the RuCl 3 precursor showed much lower catalytic activity than those prepared by impregnation of HCl. These results suggest that chlorine mainly affects the catalytic properties of alumina supported Ru catalysts for ammonia synthesis by selective site blocking.

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Section: H 2 -Tpd Study Of Unpromoted Ru/al 2 O 3 Catalystsmentioning

confidence: 93%

Section: H 2 -Tpd Study Of Unpromoted Ru/al 2 O 3 Catalystsmentioning

confidence: 99%

Effect of Chlorine on the Chemisorptive Properties and Ammonia Synthesis Activity of Alumina-Supported Ru Catalysts

et al. 2011

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“…Hydrogen was detected in the outlet gases in both modes, with no evidence for H 2 O formation within the instrumentation detection limits. The tendency of hydrogen to adsorb on the supported Ru catalysts has been recently studied by TPD method, and the increase of the H 2 desorption temperature is attributed to the hydrogen spillover from Ru metal to the support [19]. The increase of temperature causes the hydrogen atoms on the support to migrate back to the metal, recombine to hydrogen molecules and desorb.…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

Sonochemically Prepared high Dispersed Ru/TiO2 Mesoporous Catalyst for Partial Oxidation of Methane to Syngas

et al. 2005

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Highly dispersed Ru nanoparticles on mesoporous TiO 2 have been synthesized by a one-step ultrasound assisted polyol reduction procedure. The catalysts have been characterized by XRD, TEM and HR-TEM, EDX, BET and TPR methods. It has been demonstrated that the sonochemical method reduces the Ru +3 ions creating a narrow size distribution of metallic nanoparticles deposited on the mesoporous support without damaging its pore structure. The nanoparticles of Ru are highly dispersed and stable because of their incorporation into the mesopores, and the strong metal-support interaction. The catalytic properties of Ru/TiO 2 (MSP) have been tested in the partial oxidation of methane, and high activity and selectivity towards CO and H 2 have been demonstrated.

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“…Presence of supports makes adsorption studies more complex. For instance, H 2 -TPD spectra from Ru catalysts supported on SiO 2 , Al 2 O 3 or TiO 2 generally show one or two low-temperature peaks ascribed to H 2 desorbing from the metal and one large hightemperature peak attributed to H species adsorbed on the support and desorbing via the metal by a reverse spillover process [31]. The support can act as a reservoir for H species, potentially active in hydrogenation reactions [32].…”

Section: Introductionmentioning

confidence: 99%

H2/D2 isotopic exchange: A tool to characterize complex hydrogen interaction with carbon-supported ruthenium catalysts

et al. 2016

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The kinetics of H2 adsorption on supported ruthenium catalysts

Cited by 60 publications

References 17 publications

Effect of Chlorine on the Chemisorptive Properties and Ammonia Synthesis Activity of Alumina-Supported Ru Catalysts

Effect of Chlorine on the Chemisorptive Properties and Ammonia Synthesis Activity of Alumina-Supported Ru Catalysts

Sonochemically Prepared high Dispersed Ru/TiO2 Mesoporous Catalyst for Partial Oxidation of Methane to Syngas

H2/D2 isotopic exchange: A tool to characterize complex hydrogen interaction with carbon-supported ruthenium catalysts

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