In situ study by XAS of the sulfidation of industrial catalysts: the Pt and PTReAl2O3 systems

Bensaddik, A.; Caballero, A.; Bazin, Dominique; De×pert, H.; Didillon, B.; Lynch, John P.

doi:10.1016/s0926-860x(97)00094-x

Cited by 23 publications

(9 citation statements)

References 21 publications

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“…It is well known in --), (e) Linear Combination Fit (LCF) of E. coli cells treated with silver nitrate (---) and the experimental results (-), and (f) LCF of S. aureus cells treated with silver nitrate (---) and the experimental results (-) (g) LCF of Listeria monocytogenes cells treated with silver nitrate (---) and the experimental results (-) (after Bovenkamp et al [158]). heterogeneous catalysis that XANES can probe the co-ordination of sulfur by platinum [163], and determine the Pt electronic state even only present as a trace element [163][164][165][166][167][168][169][170][171]. Figure 14 shows the first XANES data collected at the L III edge of Pt in a human biopsy.…”

Section: Xanes Investigations Focusing On Drugsmentioning

confidence: 99%

XANES spectroscopy for the clinician

Bazin¹,

Réguer²,

Vantelon³

et al. 2022

Comptes Rendus. Chimie

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XANES spectroscopy, which uses synchrotron radiation as a probe, offers substantial information about the local structure of biological samples, encompassing those without long range order such as Pt anticancer molecules, and nanometre scale or amorphous particles of calcium phosphate. Its subcellular spatial resolution, as well as its capacity to operate at room temperatures and pressures represent major advantages for medical research. Moreover, paraffin embedded biopsy samples can be analysed without any further preparation, Key publications which illustrate these capacities are presented.

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Section: Xanes Investigations Focusing On Drugsmentioning

confidence: 99%

XANES spectroscopy for the clinician

Bazin¹,

Réguer²,

Vantelon³

et al. 2022

Comptes Rendus. Chimie

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“…Platinum-based anticancer drugs can bind to thiol-containing biomolecules, thus leading to the deactivation of platinum drugs [89][90][91][92]. Such deactivation is also well known in reforming to decrease the high hydrogenolysis activity [93,94].…”

Section: Preparation Protocols and Chemotherapymentioning

confidence: 99%

“…Such opportunity can be interesting for Pt based bi-metallic systems [170,171] such as PtCo [172][173][174], PtCu [175], PtPd [176][177][178], PtRu [179], PtRe [180], PtSn [181] or other bimetallic systems such as PdAu [182], CuCo [183], RuCo [184], ReCo [185], IrPd [186], CoMo [187] or MoW [188]. For example, in the case of the bi-metallic PtRe system [189,190], figure 7 shows X-ray absorption spectra collected between 11400.eV and 12100.eV, at the Pt L III and Re L II edges which are clearly identified (Figure 7a). The evolution of the white line intensities of the 2 metals give invaluable information regarding the composition of the nanometer-scale bi-metallic clusters [189] and therefore can be easily used for other bimetallic systems (Figure 7b).…”

Section: Following the Chemical Reaction "In Real Time"mentioning

confidence: 99%

François Garin: Pioneer work in catalysis through synchrotron radiation

Bazin¹

2013

Comptes Rendus. Chimie

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Progress in the kinetics and mechanisms of chemical reactions at the atomic and molecular levels. Dedicated to the scientific work of François GarinInternational audienceStarting from the late seventies, the progressively increased availability of beamlines dedicated to X-ray absorption spectroscopy allowed the execution of experiments in chemistry. In this manuscript, I describe the contribution of François Garin at the frontier of heterogeneous catalysis and synchrotron radiation. Working at \LURE\ as a scientific in charge of a beamline dedicated to X-ray absorption spectroscopy during almost twenty years and thus, having the opportunity to discuss with research groups working in heterogeneous catalysis in Europe as well as in the United States, it was quite easy to show that his work is clearly at the origin of current research in heterogeneous catalysis, not only in France, but in different synchrotron radiation centres

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“…After having added sulphur to the catalyst, the carbon deposition is reduced from 200 to 116 I1mol/g cat, and the carbon species are much richer in hydrogen [36]. The most common explanation of the effect of Re on the catalytic properties of the Pt-Re catalyst is that Re is associated with Pt in bimetallic particles and the interaction of such bimetallic particles with sulphur [39][40][41][42][43]. It has been claimed that Re prevents sintering of Pt [29,37] or that Re acts independently as an active ingredient in the modification of the carbonaceous deposits [38].…”

Section: The Ptre/alp3 Catalystmentioning

confidence: 99%