An XPS study on ruthenium compounds and catalysts

Bianchi, Claudia L.; Ragaini, V.; Cattania, M.G.

doi:10.1016/0254-0584(91)90025-p

Cited by 88 publications

(50 citation statements)

References 19 publications

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“…The peaks of the narrower doublet show an asymmetric tail and were fitted with an asymmetrically modified Gaussian/Lorenztian line-shape. For all samples, the narrow doublet is located at Ru 3d 5/2 = 280.1 ± 0.1 eV and is characteristic of metallic Ru, Ru(0), in agreement with reported values of 279.9-280.3 eV [25,44,[55][56][57]. The two other doublets correspond to oxidized Ru.…”

Section: Surface Compositionsupporting

confidence: 83%

Pt-Ru catalysts prepared by high energy ball-milling for PEMFC and DMFC: Influence of the synthesis conditions

Denis

Lefèvre

Guay

et al. 2008

Electrochimica Acta

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Section: Surface Compositionsupporting

confidence: 83%

Pt-Ru catalysts prepared by high energy ball-milling for PEMFC and DMFC: Influence of the synthesis conditions

Denis

Lefèvre

Guay

et al. 2008

Electrochimica Acta

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“…This could also be responsible for the above mentioned different performance. The presence of chloride contamination in Ru-Al 2 O 3 catalysts (synthesized from RuCl 3 precursor), also after different calcination and reduction procedures, is reported in the literature and claimed to alter the CO and H 2 chemisorption ability of these materials, as well as the charge transfer phenomena, which drastically influence the catalysts activity [37,43,[45][46][47].…”

Section: Co Methanation Activity Of Chlorine-doped Ru-al 2 O 3 _no 3 mentioning

confidence: 96%

CO Methanation Over Ru–Al2O3 Catalysts: Effects of Chloride Doping on Reaction Activity and Selectivity

et al. 2011

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The selective CO methanation (CO-SMET) process via Ru-Al 2 O 3 catalysts was investigated as a tool for complete CO removal in fuel processors, when the H 2 -rich gas so produced is employed for PEM-FCs applications to vehicles, boats, yachts and residential co-generators. CO-SMET seems, in fact, to be a good alternative to the most widely used CO preferential oxidation (CO-PROX) process. The performance of Ru-based catalysts on alumina carrier for efficient CO removal through CO-SMET was studied, exploring the role of two different Ru precursors (chloride and nitrate), and the doping effect of chloride and of Ru load (1%, 3% and 5%). First, two catalytic families (Ru-Al 2 O 3 _Cl and Ru-Al 2 O 3 _NO 3 ) were prepared by incipient wetness impregnation of alumina powder synthesized via solution combustion synthesis, by varying the Ru load. Then, based on the best obtained results, a third catalytic family was prepared adding chloride to Ru-Al 2 O 3 _NO 3 catalysts by impregnation. The CO removal performance was determined at catalyst powder level in a fixed bed micro reactor. Better performances were exhibited when Ru was deposited from chloride precursor, but the post-addition of chlorine to fresh RuAl 2 O 3 catalysts prepared with nitrate precursor tremendously improved their selectivity toward CO methanation. In particular, with both 1% and 3% Ru-Al_NO 3 catalyst chlorine doped, complete CO conversion was reached in a proper temperature range where the CO 2 methanation was suitably kept at a low acceptable level.

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“…al. studied various ruthenium compounds and catalysts via XPS [5]. They observed that thermal annealing was sufficient for reduction when the Ru compound was in its pure form.…”

Section: Introductionmentioning

confidence: 99%