X-Ray Photoelectron Spectroscopy

Lee, Hsiao-Lu; Flynn, Nolan T.

doi:10.1007/0-387-37590-2_11

Cited by 24 publications

(34 citation statements)

References 36 publications

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“…The third band corresponds to a shake-up satellite of the Cu 2p 3/2 line located at around 944 eV. This last band is related to the open 3d 9 shell configurations in the Cu state [27][28][29][30].…”

Section: Oxidation States Of the Cu/ti Surface By Xpsmentioning

confidence: 92%

Wastewater Contaminated with Hydrazine as Scavenger Agent for Hydrogen Production by Cu/Ti Nanostructures

2021

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Cu/Ti photocatalysts were prepared by the sol-gel process with different copper loadings (1.0, 2.5, and 5.0 wt.%) and then thermally treated at several calcination temperatures from 400 to 600 °C. The materials were characterized by X-ray diffraction (XRD), N2 physisorption, Scanning Electronic Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS), Ultraviolet-visible-Diffuse Reflection Spectroscopy, Ultraviolet-visible spectroscopy as a function of the temperature, (Temperature Programmed Reduction) TPR-chemisorption, XPS (X-ray Photoelectron Spectroscopy) and OH determination through DRIFTS (Diffuse reflectance infrared Fourier transform spectroscopy). The Cu/Ti photocatalysts were evaluated for the photocatalytic production of hydrogen using hydrazine as scavenging agent. Moreover, a detailed study of the Cu1+/Cu2+ ratio and the corresponding formation of copper oxide was carried out to understand the correlation between the copper species and the photocatalytic activity. Simultaneously, the OH groups on the TiO2 surface also show insights into the behavior of these materials during the photocatalytic reaction. Despite the low hydrazine concentration (20 mM), the 1.0 (wt.%) Cu/Ti 500 photocatalyst enhanced the hydrogen production three and two times more than photolysis and bare TiO2, respectively. The 1.0 Cu/Ti 500 photocatalyst displayed outstanding stability for at least three continuous cycles of 8 h each, preserving the hydrogen production. The novel ability shown in this work represents an alternative to reduce the hydrazine residues in wastewater to transform it into a hydrogen-producing energy source and must be extended to other reductive pollutants found in wastewater.

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Section: Oxidation States Of the Cu/ti Surface By Xpsmentioning

confidence: 92%

Wastewater Contaminated with Hydrazine as Scavenger Agent for Hydrogen Production by Cu/Ti Nanostructures

2021

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“…In addition, the absorption cross section for the C support is considerably more significant at lower incident energies associated with XPS. As emitted electron yield (scattered and Auger) correlates with atomic number, 83 at an XPS incident energy of 1.487 keV the carbon will emit high yields of hot electrons that can cause significant damage to surface Au species.…”

Section: Past Hints Of Cationic Au and The Development And Commercialmentioning

confidence: 99%

Acetylene hydrochlorination using Au/carbon: a journey towards single site catalysis

et al. 2017

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The replacement of mercuric chloride in the production of vinyl chloride monomer, a precursor to PVC, would greatly reduce the environmental impact of this large scale industrial process. The validation of single Au cations supported on carbon as the best catalyst for this reaction at an industrial scale has resulted from nearly 35 years of research. In this feature article we review the development of this catalyst system and address the limitations of a range of characterisation techniques used previously which may induce damage to the fresh catalyst. Following our latest findings using X-ray absorption spectroscopy, we show that under operating conditions the catalyst is atomically dispersed and can be classed as a single site catalyst, we give a perspective on future directions in single atom catalysis.

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“…The former is suggested to arise after replacing the Cl with the ligand amine and the latter is due to unreacted Cl-residues on the resin surface. As expected, two peaks are observed for the Cl 2p electrons due to spin orbital splitting [33]. Only one type of nitrogen is observed/resolved, the binding energy typical for tertiary nitrogen (pyridine, tertiary amine).…”

Section: Xps Of Mr and Immobilized Complexesmentioning

confidence: 66%

“…The peak for the Zn 2p electrons displays the typical pattern with a second smaller peak at higher energy ( Fig. 8.12c) [31,33]. The XPS spectra of the MR-[Zn 2 (NHL2)(CH 3 COO) 2 ] + compound were similar and are shown in Fig.…”

Section: Xps Of Mr and Immobilized Complexesmentioning

confidence: 90%

Immobilization of GpdQ and Related Models for Bioremedial Applications

Daumann

2014

Spectroscopic and Mechanistic Studies of Dinuclear Metallohydrolases and Their Biomimetic Complexes

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X-Ray Photoelectron Spectroscopy

Cited by 24 publications

References 36 publications

Wastewater Contaminated with Hydrazine as Scavenger Agent for Hydrogen Production by Cu/Ti Nanostructures

Wastewater Contaminated with Hydrazine as Scavenger Agent for Hydrogen Production by Cu/Ti Nanostructures

Acetylene hydrochlorination using Au/carbon: a journey towards single site catalysis

Immobilization of GpdQ and Related Models for Bioremedial Applications

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