Platinum nanoparticle induced nanoionic effects on electrical conduction in strontium cerate and zirconate

Takamura, Yasuhiro; Leonard, Kwati; Luo, Aileen; Martin, Lane W.; Matsumoto, Hiroshige

doi:10.1007/s10008-018-04188-z

Platinum nanoparticle induced nanoionic effects on electrical conduction in strontium cerate and zirconate

Journal Article · Thu Jan 24 00:00:00 EST 2019 · Journal of Solid State Electrochemistry

DOI:https://doi.org/10.1007/s10008-018-04188-z· OSTI ID:1604675

^[1]; Leonard, Kwati ^[1]; Luo, Aileen ^[2]; Martin, Lane W. ^[3]; Matsumoto, Hiroshige ^[1]

Kyushu Univ., Fukuoka (Japan)
Univ. of California, Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Heterointerfaces introduce unique localized defects into ionic conductors. This study explores the nanoionic characteristics exhibited by the proton-conducting oxides SrZr_0.9Y_0.1O_3-δ and SrCe_0.95Yb_0.05O_3-δ including finely dispersed precipitated platinum nanoparticles. The electrical conductivity of both the platinum-doped oxides revealed reversible nanoionic phenomena caused by the exsolution of the platinum in the form of platinum nanoparticles, at 0.5 vol% relative to the metal oxides, and dissolution in response to a change in gas atmosphere. In comparison with the original conductivity of SrZr_0.9Y_0.1O_3-δ and SrCe_0.95Yb_0.05O_3-δ, the conductivity of platinum-doped SrZr_0.9Y_0.1O_3-δ decreased significantly in a wet hydrogen atmosphere, whereas platinum-doped SrCe_0.95Yb_0.05O_3-δ showed almost no decrease in conductivity in the same atmosphere. Finally, the different responses of the two materials to the change in gas atmosphere are discussed in relation to the precipitation of platinum nanoparticles.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: Kyushu University Platform of Inter/Transdisciplinary Energy Research; MEXT, Japan; National Science Foundation (NSF); USDOE Office of Science (SC); World Premium International Research Center Initiative (WPI)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1604675

Journal Information:: Journal of Solid State Electrochemistry, Journal Name: Journal of Solid State Electrochemistry Journal Issue: 3 Vol. 23; ISSN 1432-8488

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
heterointerfaces
nanoionics
platinum nanoparticle exsolution
proton conductor
transport number
work function

Platinum nanoparticle induced nanoionic effects on electrical conduction in strontium cerate and zirconate

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References (26)

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