Heat of adsorption of CO on EUROPT-1 using the AEIR method: Effect of analysis parameters, water and sample mode

Jbir, Imen; Paredes-Nunez, Anaëlle; Khaddar-Zine, Sihem; Ksibir, Zouhaier; Meunier, Frédéric; Bianchi, Daniel

doi:10.1016/j.apcata.2015.08.015

Cited by 10 publications

(4 citation statements)

References 52 publications

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“…Heats of adsorption of linear adsorption modes (2030, 2065, and 2090 cm –1 ) lie in the same range of values with an E θ→0 values of around −40 and −14 kcal mol –1 at maximum coverage. These values are quite higher (in absolute value, meaning stronger interactions) than those in previous works. ,,, This difference may be due to the smaller size of the Pt cluster, which explains the stronger interaction with CO. With regard to the multibonded species, the heat of adsorption is lower than those of linear species and is similar to the literature data …”

Section: Determination Of Experimental Co Vibration Frequencies and H...supporting

confidence: 88%

“…These values are quite higher (in absolute value, meaning stronger interactions) than those in previous works. 27,29,93,94 This difference may be due to the smaller size of the Pt cluster, which explains the stronger interaction with CO. With regard to the multibonded species, the heat of adsorption is lower than those of linear species and is similar to the literature data. 91 5.…”

Section: Determination Of Experimental Co Vibration Frequencies and H...mentioning

confidence: 99%

See 1 more Smart Citation

Thermokinetic and Spectroscopic Mapping of Carbon Monoxide Adsorption on Highly Dispersed Pt/γ-Al₂O₃

Sangnier

Genty²,

Iachella

et al. 2021

ACS Catal.

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The understanding and quantification of the CO adsorption modes and strength on ultradispersed platinum catalysts supported on γ-Al2O3 is of prominent importance for analytic and catalytic purposes. We report a multiscale experimental (AEIR, CO-TPD) and theoretical approach to provide vibrational properties, adsorption enthalpies, and desorption behaviors. First principles calculations on Pt13(CO) m /γ-Al2O3 and Pt(111) surface models (using various exchange-correlation functionals) provide a complementary view to experimental approches. Adsorption enthalpies computed with the RPBE functional appear to be the most compatible with the AEIR results. The occupation of top sites by CO dominates the behavior of supported Pt clusters. CO coverage reaches higher values in comparison to Pt(111) for similar operating conditions, and considerable cluster reconstruction is observed at high coverage. First principles calculations also confirm the IR assignment related to the various adsorption modes on top and bridge sites and demonstrate a particle size effect, lowering the frequency of linear adsorption at top sites with respect to extended Pt(111) surfaces. Finally, first principles-based microkinetic modeling of CO-TPD experiments shows that the adsorption strengths predicted on the small-size cluster by DFT are compatible with the experimental values. We discuss possible reasons for the experimental desorption pattern to be much broader than the computed pattern.

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Section: Determination Of Experimental Co Vibration Frequencies and H...supporting

confidence: 88%

Section: Determination Of Experimental Co Vibration Frequencies and H...mentioning

confidence: 99%

Thermokinetic and Spectroscopic Mapping of Carbon Monoxide Adsorption on Highly Dispersed Pt/γ-Al₂O₃

Sangnier

Genty²,

Iachella

et al. 2021

ACS Catal.

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show abstract

“…The surface properties of the Pt nanoparticles were successively investigated by means of CO adsorption at room temperature, which is one of the most utilized methods for the characterization of metal surfaces and of metal nanoparticles. [68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84] Fig. 3 shows the sequence of transmission IR spectra collected upon progressive CO adsorption on Pt/Al 2 O 3 in the gas-phase (Fig.…”

Section: Co Adsorption At Room Temperaturementioning

confidence: 99%

Gas phasevs.liquid phase: monitoring H₂and CO adsorption phenomena on Pt/Al₂O₃by IR spectroscopy

Carosso

Fovanna

Ricchebuono

et al. 2022

Catal. Sci. Technol.

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“…In the present study, 25 proteins related to the regulation of COR were significantly differentially expressed (Figure 5B). corR is a DNAbinding response regulator that has a positive regulatory effect on the expression of CFA and CMA genes (Peñalozavázquez and Bender, 1998;Wang et al, 1999). Our results showed that the expression of corR was significantly upregulated in the treatment groups with FeCl3.…”

Section: Fecl 3 Upregulates the Expression Of Proteins Related To The Key Mechanisms Of Coronatine Synthesis And Regulationmentioning

confidence: 62%

Data-Independent Acquisition Proteomics Unravels the Effects of Iron Ions on Coronatine Synthesis in Pseudomonas syringae pv. tomato DC3000

Liu

et al. 2020

Front. Microbiol.

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Coronatine (COR) is a new type of plant growth regulator that is produced by Pseudomonas syringae pathovars and plays an important role in modulating plant growth, development, and tolerance to multiple stresses. However, the factors affecting COR production are not very clear. In this study, the effects of FeCl 3 on COR production were researched. The data-independent acquisition (DIA) approach, which is a proteomic quantitative analysis method, was applied to quantitatively trace COR production and proteomic changes in P. syringae pv. tomato DC3000 under different FeCl 3 culture conditions. The results showed that COR production increased with the addition of FeCl 3 and that there was significant upregulation in the expression of proteins related to COR synthesis and regulation. In addition, FeCl 3 also affected the expression of related proteins involved in various metabolic pathways such as glycolysis and the tricarboxylic acid cycle. Moreover, various precursors such as isoleucine and succinate semialdehyde, as well as other related proteins involved in the COR synthesis pathway, were significantly differentially expressed. Our findings revealed the dynamic regulation of COR production in response to FeCl 3 at the protein level and showed the potential of using the DIA method to track the dynamic changes of the P. syringae pv. tomato DC3000 proteome during COR production, providing an important reference for future research on the regulatory mechanism of COR biosynthesis and theoretical support for COR fermentation production.

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Heat of adsorption of CO on EUROPT-1 using the AEIR method: Effect of analysis parameters, water and sample mode

Cited by 10 publications

References 52 publications

Thermokinetic and Spectroscopic Mapping of Carbon Monoxide Adsorption on Highly Dispersed Pt/γ-Al₂O₃

Thermokinetic and Spectroscopic Mapping of Carbon Monoxide Adsorption on Highly Dispersed Pt/γ-Al₂O₃

Gas phasevs.liquid phase: monitoring H₂and CO adsorption phenomena on Pt/Al₂O₃by IR spectroscopy

Data-Independent Acquisition Proteomics Unravels the Effects of Iron Ions on Coronatine Synthesis in Pseudomonas syringae pv. tomato DC3000

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Heat of adsorption of CO on EUROPT-1 using the AEIR method: Effect of analysis parameters, water and sample mode

Cited by 10 publications

References 52 publications

Thermokinetic and Spectroscopic Mapping of Carbon Monoxide Adsorption on Highly Dispersed Pt/γ-Al2O3

Thermokinetic and Spectroscopic Mapping of Carbon Monoxide Adsorption on Highly Dispersed Pt/γ-Al2O3

Gas phasevs.liquid phase: monitoring H2and CO adsorption phenomena on Pt/Al2O3by IR spectroscopy

Data-Independent Acquisition Proteomics Unravels the Effects of Iron Ions on Coronatine Synthesis in Pseudomonas syringae pv. tomato DC3000

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Product

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Thermokinetic and Spectroscopic Mapping of Carbon Monoxide Adsorption on Highly Dispersed Pt/γ-Al₂O₃

Thermokinetic and Spectroscopic Mapping of Carbon Monoxide Adsorption on Highly Dispersed Pt/γ-Al₂O₃

Gas phasevs.liquid phase: monitoring H₂and CO adsorption phenomena on Pt/Al₂O₃by IR spectroscopy