ASAXS studies of carbon supported electrocatalysts

Haubold, H.‐G.; Wang, X.H.

doi:10.1016/0168-583x(95)00200-6

Cited by 25 publications

(22 citation statements)

References 4 publications

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“…[246,[338][339][340][341][342][343] ASAXS can also be used to obtain compositional information [338] and the relative distribution of different elements, for example, distinguishing between core-shell and alloyed bimetallic nanoparticles. [343][344][345] Haubold et al investigated Pt catalytic particles on carbon supports, using ASAXS to remove the background scattering from the support material. [339] Both reduced and oxidised particles were examined in this way, showing a change in size consistent with the formation of a surface oxide layer.…”

Section: Anomalous Saxsmentioning

confidence: 99%

“…The intensity of the low q feature varied with energy, but the peak did not, indicating that the low q feature was due to the CdS particle scattering while Downloaded by [New York University] at 06:05 08 June 2015 Figure 32. SAXS data collected for three Pt/C electrodes with loadings as indicated in their reduced state at 0.25 V (versus Ag/AgCl), at two X-ray energies: 10,350 eV (filled circles) and 11 [344] as catalysts on active carbon supports. In both cases, the signal from the particles was distinguished from the nanostructured background.…”

Section: Anomalous Saxsmentioning

confidence: 99%

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X-ray scattering characterisation of nanoparticles

Ingham

2015

Crystallography Reviews

144

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This article provides, in tutorial style, a review of X-ray scattering methods commonly used to characterise nanoparticles and gives numerous case studies of basic science and industrial applications right up to the present. It is divided into two major sections, broadly covering Xray diffraction and small-angle X-ray scattering. Each section begins with a brief introduction to the technique and the information that can be obtained by using it, followed by a discussion on experimental considerations, with a particular focus on nanoparticle characterisation. The techniques and analysis methods are demonstrated by way of examples of a wide variety of nanoparticle materials and synthesis methods. Recent advances in related techniques such as anomalous scattering and pair distribution function analysis are also described and discussed.

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Section: Anomalous Saxsmentioning

confidence: 99%

Section: Anomalous Saxsmentioning

confidence: 99%

X-ray scattering characterisation of nanoparticles

Ingham

2015

Crystallography Reviews

144

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“…X-ray absorption edge of platinum. Here, by anomalous scattering (Cromer & Liberman, 1981), the atomic scattering amplitudes of the platinum atoms are reduced by about 10% and the scattering contributions from Pt structures become energy dependent, whereas background scattering contributions as from the organic molecules remain unaffected and can be subtracted out (Haubold et al, 1994(Haubold et al, , 1995(Haubold et al, , 1996(Haubold et al, , 1999.…”

Section: Figurementioning

confidence: 99%

From Pt molecules to nanoparticles: in-situ (anomalous) small-angle X-ray scattering studies

et al. 2003

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Anomalous small angle X-ray scattering was employed to monitor in situ the formation of colloidal Pt particles by the reaction of Pt(acac) 2 and Al(CH3) 3 in solution. An intermediate complex molecule was found to decompose to form stable Pt particles of 1.2 nm diameter with a monomodal particle size distribution. A network like correlation in the particle positions tends to build up by organic spacer molecules between stabilizing aluminum-organic shells.

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“…This technique is most appropriate for investigation of materials density and composition inhomogeneity of dimensions between 1 and 100 nm [37]. As such, it is applied to various fields of the natural sciences, macromolecular biology, glass science, metallurgy, colloid science etc., also including studies of supported metal catalysts [38][39][40][41][42][43]. The catalytic activity of the catalysts towards methanol and CO electrooxidation was assessed with respect to a typical commercial Pt/C catalyst.…”

Section: Introductionmentioning

confidence: 99%