Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

0
5
0

Year Published

2008
2008
2020
2020

Publication Types

Select...
4

Relationship

0
4

Authors

Journals

citations
Cited by 43 publications
(5 citation statements)
references
References 2 publications
(5 reference statements)
0
5
0
Order By: Relevance
“…At low Zn/Cr ratios (Fig. 5c, d) the peaks are broadened and shifted to higher values and the broad signals are probably due to the Cr 3+ species present in the catalyst [38]. The broad ESR signal of Cr 3+ can be due to CuCr 2 O 4 species [39], which is observed at low Zn/Cr ratios in XRD analysis.…”
Section: Electron Spin Resonance Analyses (Esr)mentioning
confidence: 86%
“…Chromium trioxide may begin to melt and decompose around 200°C and 250°C, respectively, giving rise to mixed valence species Cr 3 O 8 , Cr 2 O 5 , Cr 4+ in the form of CrO 2 , and lastly Cr 2 O 3 . At the final stage, the material would appear to be green . It is important to note that there is some disagreement as to the valence states of Cr 3 O 8 and Cr 2 O 5 , but based on previous work and the available literature, the authors attribute these species to mixed valence Cr 3+ and 6+ species …”
Section: Resultsmentioning
confidence: 99%
“…(Figures 4b, 6, and 10). 52 Decomposition of CrO 3 to Cr 2 O 3 would likely leave remaining surface chromate species as the primary contributor to the hexavalent peak in Figure 6. Chromium(II) oxide has also been observed, but only under reducing conditions 35,50 which are not present in this study, so its presence is not considered plausible.…”
Section: Resultsmentioning
confidence: 99%
“…While the studies from Liu et al and Okamoto et al are the only XPS studies the authors could find claiming Cr 5+ , other studies using different characterization techniques also report the presence of Cr 5+ . 50,52 Additional work is necessary not only to resolve the possible presence of Cr 5+ , but also to support the inferred conclusions based on XPS evidence and scrutiny of relevant literature. 27 used extended X-ray absorption fine structure and X-ray absorption nearedge structure spectra to examine chromium compounds on silica and did report a mixed valence Cr 3+/6+ oxide in the form of Cr 5 O 12 , but called for additional careful studies using these techniques.…”
Section: Resultsmentioning
confidence: 99%
“… 6 It is known from the literature that chromia is well dispersed, 5 and 15% of the total surface coverage is assumed for the model, which is consistent with the literature estimations and measurements. 47 , 48 With 4.457 chromium atoms per 1 nm 2 of the chromia surface, the model catalyst thus exhibits 222 μmol of exposed Cr active sites per 1 g (61.7 μmol/mL).…”
Section: Methodsmentioning
confidence: 99%