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            ‐Ray Photoelectron and Auger Electron Spectroscopy

Moretti, Giuliano

doi:10.1002/9783527610044.hetcat0052

Cited by 4 publications

(4 citation statements)

References 50 publications

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“…1:3 and binding energies (183.4 and 184.9 eV) close to those reported for zirconium suboxide and ZrO 2 . , The P 2p peak was also fitted with two contributions at 133.1 and 135.4 eV with relative intensities in a 1:4 ratio. These values are in the binding energy ranges reported for CPO 3 , PO 4 , HPO 4 , and H 2 PO 4 units. , As there is essentially no nitrogen in the XPS spectrum, it can be concluded that no zirconium phosphonate is present, and these two peaks likely correspond to PO 4 and H 2 PO 4 /HPO 4 environments. This assignment is consistent with the broad absorption in the FT-IR spectrum at 960–1250 cm –1 , characteristic of phosphate groups (Figure S5).…”

Section: Resultssupporting

confidence: 52%

“…These values are in the binding energy ranges reported for CPO 3 , PO 4 , HPO 4 , and H 2 PO 4 units. 48,49 As there is essentially no nitrogen in the XPS spectrum, it can be concluded that no zirconium phosphonate is present, and these two peaks likely correspond to PO 4 and H 2 PO 4 /HPO 4 environments. This assignment is consistent with the broad absorption in the FT-IR spectrum at 960−1250 cm −1 , characteristic of phosphate groups (Figure S5).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Comparison of Zirconium Phosphonate-Modified Surfaces for Immobilizing Phosphopeptides and Phosphate-Tagged Proteins

Forato

Líu

Benoit³

et al. 2016

Langmuir

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Different routes for preparing zirconium phosphonate-modified surfaces for immobilizing biomolecular probes are compared. Two chemical-modification approaches were explored to form self-assembled monolayers on commercially available primary amine-functionalized slides, and the resulting surfaces were compared to well-characterized zirconium phosphonate monolayer-modified supports prepared using Langmuir-Blodgett methods. When using POCl3 as the amine phosphorylating agent followed by treatment with zirconyl chloride, the result was not a zirconium-phosphonate monolayer, as commonly assumed in the literature, but rather the process gives adsorbed zirconium oxide/hydroxide species and to a lower extent adsorbed zirconium phosphate and/or phosphonate. Reactions giving rise to these products were modeled in homogeneous-phase studies. Nevertheless, each of the three modified surfaces effectively immobilized phosphopeptides and phosphopeptide tags fused to an affinity protein. Unexpectedly, the zirconium oxide/hydroxide modified surface, formed by treating the amine-coated slides with POCl3/Zr(4+), afforded better immobilization of the peptides and proteins and efficient capture of their targets.

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Section: Resultssupporting

confidence: 52%

Section: ■ Results and Discussionmentioning

confidence: 99%

Comparison of Zirconium Phosphonate-Modified Surfaces for Immobilizing Phosphopeptides and Phosphate-Tagged Proteins

Forato

Líu

Benoit³

et al. 2016

Langmuir

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“…In favor of their argument is the good agreement between the gain in N 2 O-RFC and loss in H 2 -TPR (Figure 72c), and their interpretation of the Zn L 3 M 4.5 M 4. 5 Auger peaks (see sections 8.3 and 11.4.2). The Auger peak shows a shoulder at around 495 eV that increases with increasing H 2 -treatment pressure, which is used as evidence for the presence of metallic Zn.…”

Section: Conclude: "[T]here Is a Relationship Between The N 2 O-rfc S...mentioning

confidence: 99%

“…We point out that the Review discusses numerous characterization tools (e.g., X-ray and neutron diffraction, X-ray spectroscopy, and vibrational spectroscopies), and the reader will benefit from a basic understanding of these commonly used techniques. We recommend the interested reader to introductory literature regarding these various techniques. − …”

Section: Introductionmentioning

confidence: 99%

The Enigma of Methanol Synthesis by Cu/ZnO/Al₂O₃-Based Catalysts

Beck,

Newton,

van de Water

et al. 2024

Chem. Rev.

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The activity and durability of the Cu/ZnO/Al 2 O 3 (CZA) catalyst formulation for methanol synthesis from CO/CO 2 /H 2 feeds far exceed the sum of its individual components. As such, this ternary catalytic system is a prime example of synergy in catalysis, one that has been employed for the large scale commercial production of methanol since its inception in the mid 1960s with precious little alteration to its original formulation. Methanol is a key building block of the chemical industry. It is also an attractive energy storage molecule, which can also be produced from CO 2 and H 2 alone, making efficient use of sequestered CO 2 . As such, this somewhat unusual catalyst formulation has an enormous role to play in the modern chemical industry and the world of global economics, to which the correspondingly voluminous and ongoing research, which began in the 1920s, attests. Yet, despite this commercial success, and while research aimed at understanding how this formulation functions has continued throughout the decades, a comprehensive and universally agreed upon understanding of how this material achieves what it does has yet to be realized. After nigh on a century of research into CZA catalysts, the purpose of this Review is to appraise what has been achieved to date, and to show how, and how far, the field has evolved. To do so, this Review evaluates the research regarding this catalyst formulation in a chronological order and critically assesses the validity and novelty of various hypotheses and claims that have been made over the years. Ultimately, the Review attempts to derive a holistic summary of what the current body of literature tells us about the fundamental sources of the synergies at work within the CZA catalyst and, from this, suggest ways in which the field may yet be further advanced.

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Preparation and characterization of Nd-doped double-layer silane anticorrosion coating on AZ91D magnesium alloy surface

et al. 2021

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Magnesium alloys have found widespread application as engineering and functional materials in automobile, aerospace, electronics, and biomedical industries. However, these alloys are susceptible to corrosion, and the development of new anticorrosion coatings on Mg alloys surface is urgently needed. In this work, pristine and doped double-layer silane coatings were applied to the AZ91D Mg alloy surface in order to improve its corrosion resistance properties in a 3.5% NaCl solution. The doped silane coatings consisted of KH-550 as the bottom layer and Nd(NO3)3-doped bis-(γ-triethoxysilylpropyl)-tetrasulfide (BTESPT) as the top layer. The effect of Nd(NO3)3 concentration on the corrosion inhibition properties of silane coatings was studied, and the highest corrosion resistance was achieved when the Nd(NO3)3 concentration was 5 × 10−3 mol/L. Compared to the pristine coating, the doped coating had enhanced hydrophobicity with a water contact angle of 108° and, to the best of our knowledge, one of the lowest corrosion current densities (1.51 × 10−2 μA/cm2) reported to date for treated AZ91D. These significant improvements were attributed to the presence of the Si-O-Nd network in the doped coating, leading to the uniform and homogeneous nature and excellent anticorrosion properties of Nd-doped silane coating.

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X ‐Ray Photoelectron and Auger Electron Spectroscopy

Cited by 4 publications

References 50 publications

Comparison of Zirconium Phosphonate-Modified Surfaces for Immobilizing Phosphopeptides and Phosphate-Tagged Proteins

Comparison of Zirconium Phosphonate-Modified Surfaces for Immobilizing Phosphopeptides and Phosphate-Tagged Proteins

The Enigma of Methanol Synthesis by Cu/ZnO/Al₂O₃-Based Catalysts

Preparation and characterization of Nd-doped double-layer silane anticorrosion coating on AZ91D magnesium alloy surface

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X ‐Ray Photoelectron and Auger Electron Spectroscopy

Cited by 4 publications

References 50 publications

Comparison of Zirconium Phosphonate-Modified Surfaces for Immobilizing Phosphopeptides and Phosphate-Tagged Proteins

Comparison of Zirconium Phosphonate-Modified Surfaces for Immobilizing Phosphopeptides and Phosphate-Tagged Proteins

The Enigma of Methanol Synthesis by Cu/ZnO/Al2O3-Based Catalysts

Preparation and characterization of Nd-doped double-layer silane anticorrosion coating on AZ91D magnesium alloy surface

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Product

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The Enigma of Methanol Synthesis by Cu/ZnO/Al₂O₃-Based Catalysts