Surface modification of a fuel cell material by ion implantation

Vervoort, Agj Twan; Scanlon, P. J.; Ridder, de M Marco; Brongersma, H.H.; Welzenis, van Rg Robert

doi:10.1016/s0168-583x(01)01308-8

Cited by 15 publications

(4 citation statements)

References 19 publications

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“…In present case no annealing was done and the circular spots were mostly in the micron range hence it was presumed that the spots could correspond to AgO or Ag 2 O clusters. Formation of oxides at surface is not unexpected since such an observation is also made in case of implantation with 10 keV V and W ions [38] and 15 keV Fe and Ti [39]. In addition to this, an increase in low angle misorientation was also observed after irradiation (Fig.…”

Section: Irradiated Ysz Pelletssupporting

confidence: 60%

Photoluminescence study on irradiated yttria stabilized zirconia

Halder

Sengupta

Sudarsan

et al. 2015

Journal of Nuclear Materials

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Section: Irradiated Ysz Pelletssupporting

confidence: 60%

Photoluminescence study on irradiated yttria stabilized zirconia

Halder

Sengupta

Sudarsan

et al. 2015

Journal of Nuclear Materials

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“…Finally, it should also be noted that presence of certain phases with low surface energies may suppress the re-segregation of impurities to a freshly polished surface (such as the CGO samples used here) by reducing the energetic driving force. This has been proposed for iron oxide, 27 as well as Vanadium and tungsten oxides on YSZ, 45 which have all been shown to enhance surface exchange in YSZ.…”

Section: Surface Defect Populationsmentioning

confidence: 99%

Improvement of Oxygen Surface Exchange Kinetics for CGO with Surface Treatment

Druce

Kilner

2013

J. Electrochem. Soc.

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The diffusion of cations from La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) into Ce 0.9 Gd 0.1 O 1.95 (CGO) upon co-sintering the two materials is well known. The effect, if any, on the electrochemical properties of the CGO is not yet known. This work attempts to simulate the interaction of CGO with the cations from LSCF by the decomposition of the relevant nitrates on single-phase CGO pellets. The decomposition products are found to enhance oxygen surface exchange in the treated samples. Three mechanisms for this are discussed; triple phase boundary effects, modification of surface defect populations, and the scavenging of detrimental contamination from the surface.

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“…YSZ is an ionic conductor often used in solid oxide fuel cell (SOFC) technology. The surface oxygen exchange at the YSZ surface is the bottleneck in the performance of the SOFC. − Improvement of the surface oxygen exchange reaction seems to be achieved by modification of the surface by, e.g., ion implantation , or thin film deposition. Iron is a likely candidate for the improvement of the surface oxygen kinetics.…”

Section: Introductionmentioning

confidence: 99%

Growth of Iron Oxide on Yttria-Stabilized Zirconia by Atomic Layer Deposition

Ridder¹,

Ven

Welzenis³

et al. 2002

J. Phys. Chem. B

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The growth and thermal stability of an iron oxide overlayer on yttria-stabilized zirconia (YSZ) have been studied using atomic layer deposition (ALD), mainly in combination with low-energy ion scattering (LEIS). These techniques form a powerful combination, where ALD is designed for controlled (sub)monolayer deposition, while LEIS selectively probes the altered outermost atomic layer. The Fe(acac) 3 precursor reacts already at room temperature with YSZ. The reaction proceeds until saturation, which is characteristic for ALD. After the results of repeated ALD cycles, which consist of Fe(acac) 3 deposition followed by an oxidation treatment, have been studied, a model could be proposed which describes the growth mode of the iron oxide layer on YSZ. Oxidation at temperatures of 800 °C and higher causes a migration of Fe 2 O 3 into the bulk, limiting its usefulness in surface catalytic processes at these temperatures. At 800 °C the diffusion coefficient of Fe in YSZ is determined to be 10 -23 m 2 /s. The reaction mechanism of Fe(acac) 3 with the YSZ surface is studied using infrared diffuse reflectance. The results reveal more than one reaction mechanism, but there seems to be a preference for the reaction via coordinatively unsaturated sites.

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Surface modification of a fuel cell material by ion implantation

Cited by 15 publications

References 19 publications

Photoluminescence study on irradiated yttria stabilized zirconia

Photoluminescence study on irradiated yttria stabilized zirconia

Improvement of Oxygen Surface Exchange Kinetics for CGO with Surface Treatment

Growth of Iron Oxide on Yttria-Stabilized Zirconia by Atomic Layer Deposition

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