CeO<sub>2</sub> and CeO<sub>2</sub>:Pr nanocrystalline powders prepared by the polymeric precursor method: Yellow and red pigments with tunable color

Gonzaga, Luiziana Aparecida; Santana, Vinícius T.; Bernardi, Maria Inês Basso; Hrubý, J.; Neugebauer, Petr; Mesquita, Alexandre

doi:10.1111/jace.17339

Cited by 13 publications

(23 citation statements)

References 42 publications

(100 reference statements)

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“…As I did in previous work, 6 I measured the intensity of each peak ( i ) of a given Ce3d spectrum as the product of the height ( h ) above background by the full‐width‐at‐half‐maximum ( FWHM ), I i = h i

\times

FWHM i , whence I derived Intra‐ and Inter‐Component peak intensity ratios as well as %atCe 3+ percentages, see Table 1. As can be seen, my %atCe 3+ values differ from those by Gonzaga et al 1 by %errors within 1 to 4, a reproducibility which I believe allows me to discuss these peak‐fittings on a quantitative basis.…”

Section: Sample Iv0 IV Iv´ Iv´´ Iv´´´ Iu0 Iu Iu´ Iu´supporting

confidence: 54%

“…The present Comment deals with the interpretation of XPS Ce3d results that Gonzaga et al put forward in a recent article concerned with CeO 2 and (Ce‐Pr)O 2 materials 1 . From the peak‐fittings of their Ce3d spectra, the authors derived at%

{Ce}^{3 +} = \frac{(][, {Ce}^{3 +})}{[{Ce}^{3 +}] + [{Ce}^{4 +}]} \times 100

percentages, and claimed that:…”

Section: Sample Iv0 IV Iv´ Iv´´ Iv´´´ Iu0 Iu Iu´ Iu´mentioning

confidence: 89%

“… increasing the annealing temperature from 400° to 800° makes at%Ce 3+ of ceria grow from 20.1 to 24.6; at constant annealing temperature (400°), addition of Pr species makes at%Ce 3+ of ceria grow from 20.1 to 26.5 1 …”

Section: Sample Iv0 IV Iv´ Iv´´ Iv´´´ Iu0 Iu Iu´ Iu´mentioning

confidence: 99%

“…Since the authors did not compensate the BE scale of their Ce3d spectra for charging effects (see Figure 4A of Ref. 1), I measured BE deviations of their fitting peaks from reference values (ΔBE in Table 1) assuming the BE of Ce 3+ ‐related peak v 0 as lying at 0.0 eV in all three spectra. ΔBEs span the range 0.0 eV (peak v´´ for sample CeO 2 ‐400) up to −2.4 eV (peaks v´ and u´ for sample CeO 2 :Pr‐400).…”

Section: Sample Iv0 IV Iv´ Iv´´ Iv´´´ Iu0 Iu Iu´ Iu´mentioning

confidence: 99%

“…increasing the annealing temperature from 400° to 800° makes at%Ce 3+ of ceria grow from 20.1 to 24.6; b. at constant annealing temperature (400°), addition of Pr species makes at%Ce 3+ of ceria grow from 20.1 to 26.5. 1 XPS Ce3d spectra do possess the unique potential to map the chemistry of the cerium and measure the relative abundance of Ce 3+ and Ce 4+ oxidic ions, provided the following points, which are the outcome of seminal theoretical and experimental work, are taken into account:…”

mentioning

confidence: 99%

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Comment on an article by Gonzaga et al. J Am Ceram Soc. 2020;103:6280‐6288

Paparazzo

2020

J. Am. Ceram. Soc.

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I argue that the authors' interpretation of X-ray photoelectron spectroscopy (XPS) Ce3d spectra of their materials is untenable because it largely neglects the electronic structure of cerium ions and spin-orbit interaction of the Ce3d subshell. I conclude that at %Ce 3+ values the authors derived from their Ce3d spectra offer an inaccurate account of the cerium chemistry of their materials. The present Comment deals with the interpretation of XPS Ce3d results that Gonzaga et al put forward in a recent article concerned with CeO 2 and (Ce-Pr)O 2 materials. 1 From the peak-fittings of their Ce3d spectra, the authors derived at%

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