Investigation of the chemical bonding in 3d8 nickel(II) charge transfer insulators (NiO, oxidic spinels) from ligand-field spectroscopy, Ni 2p XPS and X-ray absorption spectroscopy

Lenglet, M.; Hochu, F.; Dürr, J.; Tuilier, M.-H.

doi:10.1016/s0038-1098(97)00273-1

Cited by 66 publications

(32 citation statements)

References 38 publications

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“…As for the Ni-Cu series the following was observed: Ni 2p 3/2 core level gave rise to two photoelectron peaks due to the presence of two Ni species at the surface, which were attributed to Ni 0 (852.6 eV) and Ni 2+ (855.5 eV) according to literature evidence [42][43][44]. The existence of Ni 2+ was also supported by the presence of satellite peaks at about 861 eV.…”

Section: Characterizationmentioning

confidence: 68%

Modification of catalytic properties over carbon supported Ru–Cu and Ni–Cu bimetallics

Asedegbega–Nieto

Bachiller‐Baeza

Guerrero-Ruı́z

et al. 2006

Applied Catalysis A: General

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Section: Characterizationmentioning

confidence: 68%

Modification of catalytic properties over carbon supported Ru–Cu and Ni–Cu bimetallics

Asedegbega–Nieto

Bachiller‐Baeza

Guerrero-Ruı́z

et al. 2006

Applied Catalysis A: General

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“…The 2p 3/2 binding energy of Co (780.1 ± 0.3 eV) and its satellite around 785.7 eV, characteristic for Co 2? [52][53][54], the binding energy of Mn (641.1 ± 0.1 eV) and Ni (854.4 ± 0.2 eV) [53,55,56], and the Ni 2p 1/2 peak shape [52] indicate that all these transition metals are twofold positively charged, as expected for a spinel structure. Furthermore, iron is predominantly in a Fe 3?…”

Section: Ferrite Nanoparticle Synthesis and Dispersionsmentioning

confidence: 79%

Simultaneous formation of ferrite nanocrystals and deposition of thin films via a microwave-assisted nonaqueous sol–gel process

Bilecka

Kubli

Amstad

et al. 2010

J Sol-Gel Sci Technol

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Combination of the surfactant-free nonaqueous sol-gel approach with the microwave technique makes it possible to synthesize Fe 3 O 4 , CoFe 2 O 4 , MnFe 2 O 4 , and NiFe 2 O 4 nanoparticles of about 5-6 nm and with high crystallinity and good morphological uniformity. The synthesis involves the reaction of metal acetates or acetylacetonates as precursors with benzyl alcohol at 170°C under microwave irradiation of 12 min. Immersion of glass substrates in the reaction solution results in the deposition of homogeneous metal ferrite films whose thickness can be adjusted through the precursor concentration. If preformed nickel nanoparticles are used as a type of curved substrate, the ferrite nanoparticles coat the seeds and form core-shell structures. These results extend the microwave-assisted nonaqueous sol-gel approach beyond the simple synthesis of nanoparticles to the preparation of thin films on flat or curved substrates.

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“…Binding energy of Ni 2p 3/2 and Cu 2p 3/2 core electrons of the reduced catalysts is summarized in Table 2 [38,39] spinel or Ni-Mg-Al-O x periclase [30]. Cu 2p 3/2 spectra of Ni 0.5 Mg 2.4 Cu 0.1 Al catalyst exhibit a sharp peak at 932.7 eV, suggesting that Cu 2?…”

Section: Xps Of the Reduced Catalystsmentioning

confidence: 99%

Hydrogen Production by Ethanol Steam Reforming on NiCuMgAl Catalysts Derived from Hydrotalcite-Like Precursors

Chu

Wang

et al. 2011

Catal Lett

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Cu-promoted NiMgAl catalysts derived from hydrotalcites were synthesized by the urea hydrolysis method for ethanol steam reforming. The effect of Cu content on catalytic properties of the NiMgAl catalysts was studied. These catalysts were characterized by X-ray diffraction, thermogravimetric and differential analyses, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and temperature-programmed reduction. The addition of small amounts of Cu to NiMgAl catalysts leads to the increase of surface Ni species and the enhancement of Ni 2? reducibility. The Ni 0.5 Cu 0.1 Mg 2.4 Al catalyst with Cu/Ni ratio of 0.2 exhibits the higher activity and stability, showing no apparent deactivation during 20 h on stream at 700°C, whereas Ni 0.5 Mg 2.5 Al catalyst suffers severe deactivation only after 10 h on stream. This improved performance is closely related to smaller nickel particles well dispersed on the catalyst surface. The Ni 0.5 Cu 0.1 Mg 2.4 Al catalyst exhibits strong resistance to coke formation and the sintering of nickel particles.

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Investigation of the chemical bonding in 3d8 nickel(II) charge transfer insulators (NiO, oxidic spinels) from ligand-field spectroscopy, Ni 2p XPS and X-ray absorption spectroscopy

Cited by 66 publications

References 38 publications

Modification of catalytic properties over carbon supported Ru–Cu and Ni–Cu bimetallics

Modification of catalytic properties over carbon supported Ru–Cu and Ni–Cu bimetallics

Simultaneous formation of ferrite nanocrystals and deposition of thin films via a microwave-assisted nonaqueous sol–gel process

Hydrogen Production by Ethanol Steam Reforming on NiCuMgAl Catalysts Derived from Hydrotalcite-Like Precursors

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