摘要
Currently,it is of great significance to develop new proton-conduction materials with high proton conductivity,high stability,and good conducting durability to meet the demands of fuel cell and sensors.Herein,we prepared two composites DETA-HPW@MIL-101-SO_(3)H 1 and TETA-HPW@MIL-101-SO3H 2(DETA=diethylenetriamine,HPW=H_(3)PW_(12))_(4)0·xH_(2)O,MIL=Material Institut Lavoisier,TETA=triethylenetetramine)by encapsulating polyoxometalate(POM)and organic amine into a sulfonated MIL-101 through a step-by-step dipping method.Delightedly,1 and 2 have high proton conductivities of 6.4×10^(−2) and 2.9×10^(−2) S·cm^(−1) at 65℃ and 95%relative humidity(RH),respectively,which can be attributed to the fast proton transfer among acid–base pairs formed between HPW and organic amine as well between sulfonic acid and organic amine.Moreover,the time-dependent test in proton conductivity displays that their proton-conduction properties have good stability and durability,which benefit from that the electrostatic interactions among acid–base pairs and the limitation of opening size of MIL-101-SO3H make HPW and organic amine stably exist in the cages of MIL-101-SO_(3)H.The remarkable proton-conduction properties(high proton conductivity and high stability)of the two composites make them become promising proton-conduction materials.
基金
financially supported by the National Natural Science Foundation of China (Grant Nos. 22071019 and 21872021)
