TY - JOUR
T1 - Nanoprotonics in perovsikte-type oxides
T2 - Reversible changes in color and ion conductivity due to nanoionics phenomenon in platinum-containing perovskite oxide
AU - Matsumoto, Hiroshige
AU - Tanji, Takayoshi
AU - Amezawa, Koji
AU - Kawada, Tatsuya
AU - Uchimoto, Yoshiharu
AU - Furuya, Yoshihisa
AU - Sakai, Takaaki
AU - Matsuka, Maki
AU - Ishihara, Tatsumi
N1 - Funding Information:
This study was supported by a Grant-in-Aid for Scientific Research on Priority Areas “Nanoionics (No. 439 )” from the Ministry of Education, Culture, Sports, Science and Technology of Japan . XAFS spectra were measured at Photon Factory, High Energy Accelerator Research Organization, KEK, in Tsukuba, Japan.
PY - 2011/2/3
Y1 - 2011/2/3
N2 - The ion conductivity of a solid-state material is primarily a function of its chemical composition and crystal structure. However, interfaces can play an important role in the conduction process. The effects of interfaces on ionic properties can be controlled on the basis of "nanoionics". In this study, we demonstrate a nanoionics phenomenon observed in a blue platinum-containing perovskite. The proton conductivity changed reversibly in response to the precipitation of platinum nanoparticles and oxidation to form a solid solution. The results of XAFS measurements, TEM analysis, and electron holography provide evidence of the nanoionics phenomenon, and suggest a possible underlying mechanism for the conductivity change caused by the small amount of precipitated platinum nanoparticles in the perovskite oxide.
AB - The ion conductivity of a solid-state material is primarily a function of its chemical composition and crystal structure. However, interfaces can play an important role in the conduction process. The effects of interfaces on ionic properties can be controlled on the basis of "nanoionics". In this study, we demonstrate a nanoionics phenomenon observed in a blue platinum-containing perovskite. The proton conductivity changed reversibly in response to the precipitation of platinum nanoparticles and oxidation to form a solid solution. The results of XAFS measurements, TEM analysis, and electron holography provide evidence of the nanoionics phenomenon, and suggest a possible underlying mechanism for the conductivity change caused by the small amount of precipitated platinum nanoparticles in the perovskite oxide.
KW - Nanoprotonics
KW - Perovskite
KW - Platinum nanoparticle
KW - Proton conductor
KW - Space charge
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U2 - 10.1016/j.ssi.2010.11.016
DO - 10.1016/j.ssi.2010.11.016
M3 - Article
AN - SCOPUS:79251595498
SN - 0167-2738
VL - 182
SP - 13
EP - 18
JO - Solid State Ionics
JF - Solid State Ionics
IS - 1
ER -