Formation and role of Cu+ species on highly dispersed CuO/SBA-15 mesoporous materials for SOx removal: An XPS study

Gaudin, Pierrick; Fioux, Philippe; Dorge, Sophie; Nouali, Habiba; Vierling, Matthieu; Fiani, Emmanuel; Molière, Michel; Brilhac, Jean-François; Patarin, Joël

doi:10.1016/j.fuproc.2016.07.015

Cited by 86 publications

(48 citation statements)

References 50 publications

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“…The wide-angle XRD patterns of the samples, as shown in Fig. 1 34,35,37 This means that Cu(I) has been successfully generated via the efficient, controllable mild vapor-reduction (MVR) process. On the other hand, the presence of Cu(II) can be attributed to the partial reoxidation of the reduced Cu(I) in air.…”

Section: Sample Characterizationmentioning

confidence: 94%

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Recyclable Cu(i)/ZrSBA-15 prepared via a mild vapor-reduction method for efficient thiophene removal from modeled oil

Gao

Xiao

et al. 2017

RSC Adv.

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Section: Sample Characterizationmentioning

confidence: 94%

“…4B, four , respectively. In addition, the peak at 940 eV can be attributed to the shaking-up satellite peak attributed to the interaction of Cu 2+ with N. [37][38][39] SEM EDSmapping results are shown in Fig. 5.…”

Section: Sample Characterizationmentioning

confidence: 97%

Recyclable Cu(i)/ZrSBA-15 prepared via a mild vapor-reduction method for efficient thiophene removal from modeled oil

Gao

Xiao

et al. 2017

RSC Adv.

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“…The strong peaks belong to Cu 2 O and CuO, respectively, www.nature.com/scientificreports www.nature.com/scientificreports/ which indicates that Cu is easy to be oxidized with or without UV light irradiation. The presence of shake-up peaks at 945 eV and 963 eV is ascribed to the formation of Cu 2 O [46][47][48][49][50][51] . The XPS results confirm that without the UV irradiation the main surface product on Cu is CuO and it considerably decreases after UV light irradiation.…”

Section: Characterization Of Oxide Filmsmentioning

confidence: 99%

Influence of UV light irradiation on the corrosion behavior of electrodeposited Ni and Cu nanocrystalline foils

Deng

2020

Sci Rep

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Influence of ultraviolet (UV) light irradiation on the corrosion behavior of electrodeposited Ni and Cu nanocrystalline foils in 3.5% NaCl solution was studied by means of electrochemical methods, electron work function (EWF) analysis, and characterization with atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). It was demonstrated that the influence of solar light on corrosion of the metals was non-negligible, which could be very different for different materials. The UV light irradiation resulted in an increase in corrosion resistance of the Cu foil but showed an opposite influence on that of the Ni foil. Based on surface state analysis, it was concluded that the UV irradiation altered the surface oxide films. The UV light induced the formation of Cu2O on Cu, which is more stable and compacted than naturally formed CuO film. However, the UV light accelerated the formation of Ni2O3, which is loose, porous and brittle, compared to naturally formed NiO on Ni. The changes in oxide films were responsible for the opposite variations in the corrosion behavior of the Cu and Ni nanocrystalline foils caused by the UV light irradiation.

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“…Because Cu-Au/Ce also showed shake-up peaks between 940 eV and 947 eV, the presence of CuO in the catalyst is possible. In the Cu-Au/Ce-Al and Cu-Au/Al catalysts, peaks observed at 933.1 eV and 933.7 eV, respectively, indicated the presence of CuO species [32,36]. This was supported by the The Cu 2p spectra (shown in Figure 6) showed two spin-orbit multiples, which corresponded to Cu 2p 3/2 (BE~933 eV) and Cu 2p 1/2 (BE~953 eV) ionizations [20].…”

Section: Binding Energy (Ev)mentioning

confidence: 99%

“…Catalysts 2019, 9, x FOR PEER REVIEW 10 of 27 appearance of shake-up peaks near 962.0 eV and between 940 eV and 947 eV. Binding energy values between 935.2 and 938.0 eV could refer to the interaction between copper and the support [36]. The XPS spectra of Ce 3d are shown in Figure 7.…”

Section: Binding Energy (Ev)mentioning

confidence: 99%

Catalytic Oxidation of Dimethyl Disulfide over Bimetallic Cu–Au and Pt–Au Catalysts Supported on γ-Al2O3, CeO2, and CeO2–Al2O3

et al. 2019

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Dimethyl disulfide (DMDS, CH 3 SSCH 3 ) is an odorous and harmful air pollutant (volatile organic compound (VOC)) causing nuisance in urban areas. The abatement of DMDS emissions from industrial sources can be realized through catalytic oxidation. However, the development of active and selective catalysts having good resistance toward sulfur poisoning is required. This paper describes an investigation related to improving the performance of Pt and Cu catalysts through the addition of Au to monometallic "parent" catalysts via surface redox reactions. The catalysts were characterized using ICP-OES, N 2 physisorption, XRD, XPS, HR-TEM, H 2 -TPR, NH 3 -TPD, CO 2 -TPD, and temperature-programmed 18 O 2 isotopic exchange. The performance of the catalysts was evaluated in DMDS total oxidation. In addition, the stability of a Pt-Au/Ce-Al catalyst was investigated through 40 h time onstream. Cu-Au catalysts were observed to be more active than corresponding Pt-Au catalysts based on DMDS light-off experiments. However, the reaction led to a higher amount of oxygen-containing byproduct formation, and thus the Pt-Au catalysts were more selective. H 2 -TPR showed that the higher redox capacity of the Cu-containing catalysts may have been the reason for better DMDS conversion and lower selectivity. The lower amount of reactive oxygen on the surface of Pt-containing catalysts was beneficial for total oxidation. The improved selectivity of ceria-containing catalysts after the Au addition may have resulted from the lowered amount of reactive oxygen as well. The Au addition improved the activity of Al 2 O 3 -supported Cu and Pt. The Au addition also had a positive effect on SO 2 production in a higher temperature region. A stability test of 40 h showed that the Pt-Au/Ce-Al catalyst, while otherwise promising, was not stable enough, and further development is still needed.Catalytic treatment is a suitable abatement technology for VOCs, especially when emission streams are complex and when the total VOC concentrations fluctuate. Catalytic oxidation is an environmentally sound destructive method and is highly feasible economically when heat-recovery-allowing processes such as reverse flow reactors (RFRs) are used. Catalytic oxidation of SVOCs is an attractive possibility: However, due to the presence of sulfur, the selectivity and stability of the catalysts need to be improved [2].The use of bimetallic catalysts in the total oxidation of gaseous dimethyl disulfide (DMDS) has not yet been extensively studied. Ojala [5] used Pt-Pd, Mn-Mg, Cu-Cr, and Cu-Mg-Cr catalysts supported on alumina or ceria-alumina in CH 3 SH and CH 3 SSCH 3 oxidation. Kucherov et al. [6,7] studied the removal of CH 3 OH, CH 3 SH, and CH 3 SSCH 3 from flue gases using Au-Rh/HZSM-5 catalysts. The experiments demonstrated high activity and good sulfur resistance at temperatures as low as 290 • C. studied the catalytic oxidation of CH 3 SSCH 3 over Pt-Cu catalysts and reported similarly promising results.Sulfate promotes the mobility of Pt particles on the catalys...

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Formation and role of Cu+ species on highly dispersed CuO/SBA-15 mesoporous materials for SOx removal: An XPS study

Cited by 86 publications

References 50 publications

Recyclable Cu(i)/ZrSBA-15 prepared via a mild vapor-reduction method for efficient thiophene removal from modeled oil

Recyclable Cu(i)/ZrSBA-15 prepared via a mild vapor-reduction method for efficient thiophene removal from modeled oil

Influence of UV light irradiation on the corrosion behavior of electrodeposited Ni and Cu nanocrystalline foils

Catalytic Oxidation of Dimethyl Disulfide over Bimetallic Cu–Au and Pt–Au Catalysts Supported on γ-Al2O3, CeO2, and CeO2–Al2O3

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