多金属氧酸盐
材料科学
镧系元素
电导率
质子化
质子
分子
氢键
离子
无机化学
高分子化学
物理化学
有机化学
催化作用
化学
物理
量子力学
作者
Tsukasa Iwano,Kota Shitamatsu,Naoki Ogiwara,Masanari Okuno,Yuji Kikukawa,Shinji Ikemoto,Sora Shirai,Satoshi Muratsugu,Paul G. Waddell,R. John Errington,Masahiro Sadakane,Sayaka Uchida
标识
DOI:10.1021/acsami.1c01752
摘要
The exploration of composition–structure–function relationship in proton-conducting solids remains a challenge in materials chemistry. Polyoxometalate-based compounds have been long considered as candidates for proton conductors; however, their low structural stability and a large decrease in conductivity under reduced relative humidity (RH) have limited their applications. To overcome such limitations, the hybridization of polyoxometalates with proton-conducting polymers has emerged as a promising method. Besides, 4f lanthanide ions possess a high coordination number, which can be utilized to attract water molecules and to build robust frameworks. Herein, a Preyssler-type polyoxometalate functionalized with a 9-coordinate Eu3+ (Eu[P5W30O110K]11–) is newly synthesized and combined with poly(allylamine) with amine moieties as protonation sites. The resulting robust crystalline composite exhibits an ultrahigh proton conductivity >10–2 S cm–1 at 368 K and 90% RH, which is still >10–3 S cm–1 at 50% RH, due to the strengthened and extended hydrogen-bonding network.
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