Chemical state identification of Ce3+/Ce4+ in the Sm0.2Ce0.8O2−δ electrolyte for an anode-supported solid oxide fuel cell after long-term operation

Lin, Ting-Yun; Lee, Maw-Chwain; Yang, Rung-Je; Chang, Jen-Chen; Kao, Wei-Xin; Lee, Ling-Song

doi:10.1016/j.matlet.2012.04.122

Cited by 33 publications

(9 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to gain insight into the mechanism behind the large plasmonic peak shifts and high sensitivity toward H 2 detection in a zero oxygen environment, XPS analysis was performed to characterize the material/chemical properties of the Au-CeO 2 film. XPS analysis has been used numerous times in the literature to determine the ratio between Ce 3+ /Ce 4+ ions , and for identification of ionic gold species. − Depth profiling was used to etch layers of material for 45 s at a time which removed 1.3 nm of material between each scan monitoring the Ce 3d and Au6s peaks. A representative Au6s peak is shown in Figure a.…”

mentioning

confidence: 99%

High Sensitivity Plasmonic Sensing of Hydrogen over a Broad Dynamic Range Using Catalytic Au-CeO₂ Thin Film Nanocomposites

et al. 2018

View full text Add to dashboard Cite

Next-generation gas-sensor technologies are needed for diverse applications including environmental surveillance, occupational safety, and industrial process control. However, the dynamic range using existing sensors is often too narrow to meet demands. In this work, plasmonic films of Au-CeO2 that detect hydrogen with 0.38% and 60% lower and upper detection limits in an oxygen-free atmosphere experiment are demonstrated. The observed 15 nm peak shift was 4 times stronger versus other plasmonic H2 sensors. The proposed sensing mechanism that involves H2 dissociation by Auδ+ nanoparticles was validated using XPS, kinetics, and Arrhenius studies. Our understanding of this remarkable sensing behavior in oxygen-free conditions opens new horizons for packaging, art conservation, industrial process control, and other applications where conventional oxygen-dependent sensors lack broad dynamic range.

show abstract

mentioning

confidence: 99%

High Sensitivity Plasmonic Sensing of Hydrogen over a Broad Dynamic Range Using Catalytic Au-CeO₂ Thin Film Nanocomposites

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The cell voltage slightly degrades at around 5 h. This could be resulted from the change of cerium valence state in the F-CeO 2 /Sr-Fe-Mo-oxide composite in the initial stage2627. Some Ce 4+ ions were reduced to Ce 3+ ions at H 2 input side282930 leading to the coexistence of both cerium ions valence states. The phase analysis of the F-CeO 2 /Sr-Fe-Mo-oxide layer after long-term stability test was displayed in Fig.…”

Section: Resultsmentioning

confidence: 99%

Flowerlike CeO2 microspheres coated with Sr2Fe1.5Mo0.5Ox nanoparticles for an advanced fuel cell

Liu

Tang

et al. 2015

Sci Rep

View full text Add to dashboard Cite

Flowerlike CeO2 coated with Sr2Fe1.5Mo0.5Ox (Sr-Fe-Mo-oxide) nanoparticles exhibits enhanced conductivity at low temperatures (300–600 oC), e.g. 0.12 S cm−1 at 600 oC, this is comparable to pure ceria (0.1 S cm−1 at 800 oC). Advanced single layer fuel cell was constructed using the flowerlike CeO2/Sr-Fe-Mo-oxide layer attached to a Ni-foam layer coated with the conducting transition metal oxide. Such fuel cell has yielded a peak power density of 802 mWcm−2 at 550 oC. The mechanism of enhanced conductivity and cell performance were analyzed. These results provide a promising strategy for developing advanced low-temperature SOFCs.

show abstract

“…After aging, the SR compounds became vulcanizates, implying the occurrence of radical mechanism. In Figure 8b, (21,31,32). The results indicated the partially conversion of Ce 4+ to Ce 3+ in aged SR composites.…”

Section: Xps Of Sr Compounds and Compositesmentioning

confidence: 87%

Enhanced thermal oxidative stability of silicone rubber by using cerium-ferric complex oxide as thermal oxidative stabilizer

Zhang

2019

E-Polymers

View full text Add to dashboard Cite

Cerium (Ce)-ferric (Fe) complex oxides were prepared via a citric acid sol-gel process, and used as thermal oxidative stabilizers for silicone rubber (SR). The oxides were characterized by X-ray diffraction and Raman spectroscopy. The Ce/Fe molar ratio in Ce-Fe complex oxides significantly influenced the thermal oxidative stability of SR. After aging at 300°C for 24 h, SR filled with 4 phr Ce-Fe complex oxide with a Ce/(Ce+Fe) molar ratio of 0.8 (CeFeO-0.8) exhibited excellent thermal oxidative stability, retaining 56.8% and 54.3% of its original tensile strength and elongation at break, respectively. Some Ce3+ and Fe2+ ions were detected in aged SR composites. Ce3+/Ce4+ and Fe2+/Fe3+ molar ratios in SR/CeFeO-0.8 were less than that in SR/CeO2 and SR/Fe2O3 composites, respectively, as detected by X-ray photoelectron spectroscopy. It implies rapid re-oxidations of Fe2+ and Ce3+ occurred in SR/CeFeO-0.8, enhancing the capacity of CeFeO-0.8 to capture radicals during thermal aging.

show abstract

Chemical state identification of Ce3+/Ce4+ in the Sm0.2Ce0.8O2−δ electrolyte for an anode-supported solid oxide fuel cell after long-term operation

Cited by 33 publications

References 12 publications

High Sensitivity Plasmonic Sensing of Hydrogen over a Broad Dynamic Range Using Catalytic Au-CeO₂ Thin Film Nanocomposites

High Sensitivity Plasmonic Sensing of Hydrogen over a Broad Dynamic Range Using Catalytic Au-CeO₂ Thin Film Nanocomposites

Flowerlike CeO2 microspheres coated with Sr2Fe1.5Mo0.5Ox nanoparticles for an advanced fuel cell

Enhanced thermal oxidative stability of silicone rubber by using cerium-ferric complex oxide as thermal oxidative stabilizer

Contact Info

Product

Resources

About

Chemical state identification of Ce3+/Ce4+ in the Sm0.2Ce0.8O2−δ electrolyte for an anode-supported solid oxide fuel cell after long-term operation

Cited by 33 publications

References 12 publications

High Sensitivity Plasmonic Sensing of Hydrogen over a Broad Dynamic Range Using Catalytic Au-CeO2 Thin Film Nanocomposites

High Sensitivity Plasmonic Sensing of Hydrogen over a Broad Dynamic Range Using Catalytic Au-CeO2 Thin Film Nanocomposites

Flowerlike CeO2 microspheres coated with Sr2Fe1.5Mo0.5Ox nanoparticles for an advanced fuel cell

Enhanced thermal oxidative stability of silicone rubber by using cerium-ferric complex oxide as thermal oxidative stabilizer

Contact Info

Product

Resources

About

High Sensitivity Plasmonic Sensing of Hydrogen over a Broad Dynamic Range Using Catalytic Au-CeO₂ Thin Film Nanocomposites

High Sensitivity Plasmonic Sensing of Hydrogen over a Broad Dynamic Range Using Catalytic Au-CeO₂ Thin Film Nanocomposites