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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.


XRD patterns of(a) flowerlike CeO2 and (b) CeO2 coatedwith Sr-Fe-Mo-oxide.
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f3: XRD patterns of(a) flowerlike CeO2 and (b) CeO2 coatedwith Sr-Fe-Mo-oxide.

Mentions: The phases and purity of as-prepared flowerlike ceria andF-CeO2/Sr-Fe-Mo-oxide samples were examined by x-ray diffraction(XRD) patterns. All diffraction peaks in the patterns of Fig.3a can be ascribed to a face-centered cubic fluorite structureCeO2 (JCPDS 34–0394)2122. It isworthy noted that all the diffraction peaks of flowerlike CeO2 coatedwith Sr-Fe-Mo-oxide composite have no shift compared with that of pure ceria.This indicates that the Sr-Fe-Mo-oxide in ceria did not induce any detectablestructural changes and doping effect. Hence, our material coating approach issuccessful. The grain size of F-CeO2 is approximately6 nm, estimated from the strongest (111) peak with Scherrerequation. Further detailed phase analysis is limited since no peaks ofSr-Fe-Mo-oxide could be detected by XRD. This may be due to the coatinglimitation at a composition of 4.0 mol% which may be under the XRDdetection level. Anyhow, the uniform coating of Sr-Fe-Mo-oxide particles hassucceeded in unique F-CeO2/Sr-Fe-Mo-oxide semiconductor-ioniccomposite material with high electrical and electrocatalyst properties.


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)

XRD patterns of(a) flowerlike CeO2 and (b) CeO2 coatedwith Sr-Fe-Mo-oxide.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f3: XRD patterns of(a) flowerlike CeO2 and (b) CeO2 coatedwith Sr-Fe-Mo-oxide.
Mentions: The phases and purity of as-prepared flowerlike ceria andF-CeO2/Sr-Fe-Mo-oxide samples were examined by x-ray diffraction(XRD) patterns. All diffraction peaks in the patterns of Fig.3a can be ascribed to a face-centered cubic fluorite structureCeO2 (JCPDS 34–0394)2122. It isworthy noted that all the diffraction peaks of flowerlike CeO2 coatedwith Sr-Fe-Mo-oxide composite have no shift compared with that of pure ceria.This indicates that the Sr-Fe-Mo-oxide in ceria did not induce any detectablestructural changes and doping effect. Hence, our material coating approach issuccessful. The grain size of F-CeO2 is approximately6 nm, estimated from the strongest (111) peak with Scherrerequation. Further detailed phase analysis is limited since no peaks ofSr-Fe-Mo-oxide could be detected by XRD. This may be due to the coatinglimitation at a composition of 4.0 mol% which may be under the XRDdetection level. Anyhow, the uniform coating of Sr-Fe-Mo-oxide particles hassucceeded in unique F-CeO2/Sr-Fe-Mo-oxide semiconductor-ioniccomposite material with high electrical and electrocatalyst properties.

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.