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A proton-conductive lanthanide oxalatophosphonate framework featuring unique chemical stability: stabilities of bulk phase and surface structure

Abstract

Metal-organic frameworworks (MOFs) as a new type of proton conductor have undergone rapid development due to available crystal structure and excellent film-forming ability. However, few MOFs for proton conduction have shown good chemical stability in the practical applications, mainly tolerance to water, acid, base and organic solvents, and even if they are stable, their stabilities have been roughly confirmed by powder X-ray diffraction (PXRD). Herein, we select a chemical stable lanthanide oxalatophosphonate framework with proton conductivity as an example, and present an effective approach to analyze and evaluate chemical stability based on bulk phase and surface structure. More concretely, framework integrity, complete ratio (defects), surface morphology and coordination environment have been characterized by using powder X-ray diffraction (PXRD), inductively coupled plasma optical emission spectrometry (ICP-OES), optical microscopy (OM) and X-ray photoelectron spectroscopy (XPS). The study provides a new insight into understanding chemical stability from the materials themselves and a positive result for MOFs and their related materials in industrial applications.

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Publication details

The article was received on 01 May 2017, accepted on 08 Nov 2017 and first published on 08 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA03744A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    A proton-conductive lanthanide oxalatophosphonate framework featuring unique chemical stability: stabilities of bulk phase and surface structure

    G. Zhu, X. Q. liang, K. Cai, F. Zhang and J. Liu, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA03744A

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