Highly defective CeO<sub>2</sub> as a promoter for efficient and stable water oxidation

Liang, Fengli; Yu, Yi; Zhou, Wei; Xu, Xiaoyong; Zhu, Zhonghua

doi:10.1039/c4ta05770h

Cited by 237 publications

(94 citation statements)

References 33 publications

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“…However, due to spin‐orbit coupling and photoemission effect, Ce 3d region further characterized into ten components. Figure (a) shows the deconvoluted peaks of Ce 3d region for the two groups’ u and v. The components v 0 (881.1 eV), v / (885.4 eV), u 0 (897.9 eV), u / (903.9 eV) and v (884.4 eV), v // (889.4 eV), v /// (894.6 eV), u (901.0 eV), u // (907.4 eV), u /// (915.3 eV) corresponds to Ce 3+ and Ce 4+ species respectively . The deconvoluted peaks of O 1 s is shown in Figure (b).…”

Section: Resultsmentioning

confidence: 99%

A Simple Chemical Route toward High Surface Area CeO₂ Nanoparticles Displaying Remarkable Radical Scavenging Activity

et al. 2017

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This work reports a simple chemical route to synthesize high surface area ceria (CeO2) nanoparticles which exhibit remarkable radical scavenging activity. Synthesized CeO2 nanoparticles are characterized by thermogravimetric analysis (TGA), X‐ray diffraction (XRD), Fourier‐transform infrared spectroscopy (FTIR) and Raman spectroscopy, scanning electron microscopy (SEM), energy‐dispersive X‐ray analysis (EDX), transmission electron microscopy (TEM), and Brunauer‐Emmett‐Teller surface area (BET surface area) analyses. The characterization results reveal the formation of cubic phase of CeO2 with particles sizes of 10 nm and a remarkably high specific surface area of 236.8 m2/g. The nanoparticles are explored for 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) and hydroxyl radical scavenging activity that is to assess the antioxidant property of nanoceria by in‐vitro spectrophotometric approach.

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Section: Resultsmentioning

confidence: 99%

A Simple Chemical Route toward High Surface Area CeO₂ Nanoparticles Displaying Remarkable Radical Scavenging Activity

et al. 2017

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“…The O1sX PS spectra ( Figure 2) for all compounds presentt wo main features. [9] Ta ble 2d etailst he relative amounts of these different (lattice and surface) oxygen species as estimated from the relative area of their sub-peaks. The broad peak at higher BE can be deconvoluted into three peaks:t he first one (at the lowest BE) is characteristico fs urfaceo xygen in the form of O 2 2À /O À ;t he next one (at higher BE) is ascribed to the hydroxyl groups (OH À ;a lso on the surface);w hereas the last (at the highest BE) is attributed to the molecular water or carbonates adsorbed on the surface.…”

Section: Surfacea Nd Bulk Propertiesmentioning

confidence: 99%

Activity and Stability of Ruddlesden–Popper‐Type La_n+1Ni_nO_3n+1 (n=1, 2, 3, and ∞) Electrocatalysts for Oxygen Reduction and Evolution Reactions in Alkaline Media

Sunarso

Zhu

et al. 2016

Chemistry A European J

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Increasing energy demands have stimulated intense research activity on cleaner energy conversion such as regenerative fuel cells and reversible metal-air batteries. It is highly challenging but desirable to develop low-cost bifunctional catalysts for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER), the lack of which is currently one of the major limiting components towards commercialization of these technologies. Here, we have conducted a systematic study on the OER and ORR performances of the Ruddlesden-Popper family of La(n+1)Ni(n) O(3n+1) (n=1, 2, 3, and ∞) in an alkaline medium for the first time. It is apparent that the Ni-O bond lengths and the hyperstoichiometric oxides in the rock-salt layers correlate with the ORR activities, whereas the OER activities appear to be influenced by the OH(-) content on the surface of the compounds. In our case, the electronic configuration fails to predict the electrocatalytic activity of these compounds. This work provides guidelines to develop new electrocatalysts with improved performances.

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“…4b) can be attributed to the lattice oxygen, surface oxygen, oxygen from water and OH groups. The relationship between the position of the O1s peaks and the chemical state of oxygen was suggested on the basis of previously published papers [7], [8], [9]. The results for each sample are shown in Table 2.…”

Section: Datamentioning

confidence: 99%

In situ XPS data for the uranyl-modified oxides under visible light

et al. 2018

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The silica, alumina, ceria, and titania supports were modified with uranyl ions (5 wt%) and investigated using X-ray photoelectron spectroscopy. The data show the U4f photoelectron spectra and charge state of uranium for uranyl ions deposited on different supports. The additional in situ XPS experiments with simultaneous irradiation of the sample using a 450 nm light-emitting diode were performed, and the XPS spectra, revealing a partial reduction of uranium under visible irradiation, are presented. The data show the effect of support material on the chemical states of uranium and oxygen on the surface of uranyl-modified oxides under visible light.

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Highly defective CeO₂ as a promoter for efficient and stable water oxidation

Cited by 237 publications

References 33 publications

A Simple Chemical Route toward High Surface Area CeO₂ Nanoparticles Displaying Remarkable Radical Scavenging Activity

A Simple Chemical Route toward High Surface Area CeO₂ Nanoparticles Displaying Remarkable Radical Scavenging Activity

Activity and Stability of Ruddlesden–Popper‐Type La_n+1Ni_nO_3n+1 (n=1, 2, 3, and ∞) Electrocatalysts for Oxygen Reduction and Evolution Reactions in Alkaline Media

In situ XPS data for the uranyl-modified oxides under visible light

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Highly defective CeO2 as a promoter for efficient and stable water oxidation

Cited by 237 publications

References 33 publications

A Simple Chemical Route toward High Surface Area CeO2 Nanoparticles Displaying Remarkable Radical Scavenging Activity

A Simple Chemical Route toward High Surface Area CeO2 Nanoparticles Displaying Remarkable Radical Scavenging Activity

Activity and Stability of Ruddlesden–Popper‐Type Lan+1NinO3n+1 (n=1, 2, 3, and ∞) Electrocatalysts for Oxygen Reduction and Evolution Reactions in Alkaline Media

In situ XPS data for the uranyl-modified oxides under visible light

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Highly defective CeO₂ as a promoter for efficient and stable water oxidation

A Simple Chemical Route toward High Surface Area CeO₂ Nanoparticles Displaying Remarkable Radical Scavenging Activity

A Simple Chemical Route toward High Surface Area CeO₂ Nanoparticles Displaying Remarkable Radical Scavenging Activity

Activity and Stability of Ruddlesden–Popper‐Type La_n+1Ni_nO_3n+1 (n=1, 2, 3, and ∞) Electrocatalysts for Oxygen Reduction and Evolution Reactions in Alkaline Media