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

Liu Y, Tang Y, Ma Z, Singh M, He Y, Dong W, Sun C, Zhu B - Sci Rep (2015)

Bottom Line: 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 °C.These results provide a promising strategy for developing advanced low-temperature SOFCs.

View Article: PubMed Central - PubMed

Affiliation: 1] Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Science, Hubei University, Wuhan, Hubei 430062 [2] Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, 438 Hebei Street, Qinhuangdao, 066004, P.R. China.

ABSTRACT
Flowerlike CeO2 coated with Sr2Fe1.5Mo0.5Ox (Sr-Fe-Mo-oxide) nanoparticles exhibits enhanced conductivity at low temperatures (300-600 °C), e.g. 0.12 S cm(-1) at 600 °C, this is comparable to pure ceria (0.1 S cm(-1) at 800 °C). 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 °C. The mechanism of enhanced conductivity and cell performance were analyzed. These results provide a promising strategy for developing advanced low-temperature SOFCs.

No MeSH data available.


(a) SEM image; (b) EDX and (c) Elemental mapping of theflowerlike ceria coated with Sr-Fe-Mo-oxide after calcination at750 oC for 2 h.
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f2: (a) SEM image; (b) EDX and (c) Elemental mapping of theflowerlike ceria coated with Sr-Fe-Mo-oxide after calcination at750 oC for 2 h.

Mentions: Figure 1 shows the mesoporous ceria microspheres with aflowerlike texture observed by a field-emission scanning electron microscope(FE-SEM). The flowerlike CeO2 particles (see Fig.1a,b) show an open three-dimensional porous and hollow microspherecomposed of numerous interweaved thin flakes as the petals. These microspheresare nearly monodisperse with diameter approximately 2 to5 μm. Fig.1c,d give an overview ofthe F-CeO2/Sr-Fe-Mo-oxide composite, which show Sr-Fe-Mo-oxideparticles are highly dispersed on the surface of flowerlike CeO2microspheres without any structural change. These Sr-Fe-Mo-oxide particles werecoated on the surface of ceria microsphere. Due to the mesoporous structure ofthe flowerlike ceria microspheres, it provides sufficient spaces to integratewith sheet-like Sr-Fe-Mo-oxide particles. Sr-Fe-Mo-oxide, as a high electronicconducting material, is coated on the surface of ionic conductor ceria, to makea semiconducting-ionic conducting composite material for the single layer fuelcell. To further analyze the composition of the composite layer, the energydispersive x-ray (EDX) analysis and elemental mapping of the surroundingflowerlike ceria particles were shown in Fig. 2. Theresults confirm the existences of Sr, Fe, and Mo, indicating that Sr-Fe-Mo-oxideparticles were successfully loaded onto the flowerlike ceria microspheres. Itcan be seen from the elemental mapping images (Fig. 2c)that various elements of Sr-Fe-Mo-oxide uniformly distributed on the surface ofceria to form F-CeO2/Sr-Fe-Mo-oxide composite type material.


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

Liu Y, Tang Y, Ma Z, Singh M, He Y, Dong W, Sun C, Zhu B - Sci Rep (2015)

(a) SEM image; (b) EDX and (c) Elemental mapping of theflowerlike ceria coated with Sr-Fe-Mo-oxide after calcination at750 oC for 2 h.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4495617&req=5

f2: (a) SEM image; (b) EDX and (c) Elemental mapping of theflowerlike ceria coated with Sr-Fe-Mo-oxide after calcination at750 oC for 2 h.
Mentions: Figure 1 shows the mesoporous ceria microspheres with aflowerlike texture observed by a field-emission scanning electron microscope(FE-SEM). The flowerlike CeO2 particles (see Fig.1a,b) show an open three-dimensional porous and hollow microspherecomposed of numerous interweaved thin flakes as the petals. These microspheresare nearly monodisperse with diameter approximately 2 to5 μm. Fig.1c,d give an overview ofthe F-CeO2/Sr-Fe-Mo-oxide composite, which show Sr-Fe-Mo-oxideparticles are highly dispersed on the surface of flowerlike CeO2microspheres without any structural change. These Sr-Fe-Mo-oxide particles werecoated on the surface of ceria microsphere. Due to the mesoporous structure ofthe flowerlike ceria microspheres, it provides sufficient spaces to integratewith sheet-like Sr-Fe-Mo-oxide particles. Sr-Fe-Mo-oxide, as a high electronicconducting material, is coated on the surface of ionic conductor ceria, to makea semiconducting-ionic conducting composite material for the single layer fuelcell. To further analyze the composition of the composite layer, the energydispersive x-ray (EDX) analysis and elemental mapping of the surroundingflowerlike ceria particles were shown in Fig. 2. Theresults confirm the existences of Sr, Fe, and Mo, indicating that Sr-Fe-Mo-oxideparticles were successfully loaded onto the flowerlike ceria microspheres. Itcan be seen from the elemental mapping images (Fig. 2c)that various elements of Sr-Fe-Mo-oxide uniformly distributed on the surface ofceria to form F-CeO2/Sr-Fe-Mo-oxide composite type material.

Bottom Line: 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 °C.These results provide a promising strategy for developing advanced low-temperature SOFCs.

View Article: PubMed Central - PubMed

Affiliation: 1] Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Science, Hubei University, Wuhan, Hubei 430062 [2] Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, 438 Hebei Street, Qinhuangdao, 066004, P.R. China.

ABSTRACT
Flowerlike CeO2 coated with Sr2Fe1.5Mo0.5Ox (Sr-Fe-Mo-oxide) nanoparticles exhibits enhanced conductivity at low temperatures (300-600 °C), e.g. 0.12 S cm(-1) at 600 °C, this is comparable to pure ceria (0.1 S cm(-1) at 800 °C). 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 °C. The mechanism of enhanced conductivity and cell performance were analyzed. These results provide a promising strategy for developing advanced low-temperature SOFCs.

No MeSH data available.