Proton-Conductive Cerium-Based Metal-Organic Frameworks

Wei Huan Ho, Shih Cheng Li, Yi Ching Wang, Tzu En Chang, Yi Ting Chiang, Yi Pei Li, Chung Wei Kung

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

In this study, proton-conducting behaviors of a cerium-based metal-organic framework (MOF), Ce-MOF-808, its zirconium-based isostructural MOF, and bimetallic MOFs with various Zr-to-Ce ratios are investigated. The significantly increased proton conductivity (σ) and decreased activation energy (Ea) are obtained by substituting Zr with Ce in the nodes of MOF-808. Ce-MOF-808 achieves a σ of 4.4 × 10-3 S/cm at 25 °C under 99% relative humidity and an Ea of 0.14 eV; this value is among the lowest-reported Ea of proton-conductive MOFs. Density functional theory calculations are utilized to probe the proton affinities of these MOFs. As the first study reporting the proton conduction in cerium-based MOFs, the finding here suggests that cerium-based MOFs should be a better platform for the design of proton conductors compared to the commonly reported zirconium-based MOFs in future studies on energy-related applications.

原文English
頁(從 - 到)55358-55366
頁數9
期刊ACS Applied Materials and Interfaces
13
發行號46
DOIs
出版狀態Published - 2021 11月 24

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)

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