NDLI: Synthesis, crystal structure, and ionic conductivity of tunnel structure phosphates, RbMg1−xH2x(PO3)3·y(H2O)

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Synthesis, crystal structure, and ionic conductivity of tunnel structure phosphates, RbMg_1−xH_2x(PO₃)₃·y(H₂O)

Additions and corrections for Journal of Materials Chemistry A published in 2013

Additions and corrections for Journal of Materials Chemistry published in 2013

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Synthesis, crystal structure, and ionic conductivity of tunnel structure phosphates, RbMg_1−xH_2x(PO₃)₃·y(H₂O)

Content Provider	Royal Society of Chemistry (RSC)
Author	Pitteloud, Cedric Hirayama, Masaaki Yonemura, Masao Koga, Hikaru Nagao, Miki Matsuda, Yasuaki Kanno, Ryoji
Copyright Year	2013
Abstract	A new proton conductor, RbMg1−xH2x(PO3)3·yH2O, was synthesized by the coprecipitation method followed by sintering at 540 K. The range of solid solution for RbMg1−xH2x(PO3)3·yH2O was 0.00 < x < 0.18 and the highest conductivity of 5.5 × 10−3 S cm−1 was observed at 443 K for the composition of x = 0.11. The structure of RbMg1−xH2x(PO3)3·yH2O was determined from 298 to 553 K by Rietveld refinement with multi-profile analysis using X-ray and neutron diffraction data. The framework structure is composed of PO4 tetrahedra connected with each other by corner-sharing to form spiral PO4 chains along the c-direction. One-dimensional tunnels are formed between these spiral chains, in which water molecules are located. The water molecules form one-dimensional spiral chains and are connected to the spiral PO4 chain by hydrogen bonding. The introduction of acidic, hydrophilic head groups (–PO3H) into the PO4 framework by the formation of a solid solution provides binding sites for water and an environment for the efficient diffusion of protons. One-dimensional proton diffusion, similar to proton channels in biological systems, could be explained by the vehicle mechanism of H3O+ along the one-dimensional water chain.
Starting Page	15544
Ending Page	15551
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	1
Issue Number	48
Journal	Journal of Materials Chemistry A
DOI	10.1039/c3ta13004e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Rietveld Proton conductor Coprecipitation Sintering Solid solution Rietveld refinement X-ray crystallography Neutron diffraction Tetrahedron Hydrogen bond Hydrophile Diffusion Proton
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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