Abstract
A new cerium phosphite-oxalate, [Ce2(H2PO3)(C2O4)4](C6N2H16)·H3O·3H2O (1), was prepared under solvothermal condition using 1-ethylpiperazine as template. Single-crystal X-ray diffraction proves that compound 1 has a new three-dimensional (3D) structure constructed with CeO9 polyhedra, [C2O42−] ligands and [H2PO3−] groups. View along the b-axis, 1-ethylpiperazine cations and water molecules alternately located in the adjacent 12-ring channels. Impedance analysis shows that the proton conductivity of 1 is up to 9.17 × 10−4 S cm−1 at 75 °C and 98 % relative humidity (RH). Stability test reveals that proton conduction has good persistence at the highest temperature and humidity. This suggests that compound 1 possesses promising proton conductivity property, making it into a potential candidate material for proton exchange membranes.
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