Synthesis and conductivity of solid high-proton conductor H{sub 5}GeW{sub 10}MoVO{sub 40}.21H{sub 2}O
- Department of Chemistry, Zhejiang University, Hangzhou 310027 (China)
A new solid high-proton conductor decatungstomolybdovanadogermanic heteropoly acid (HPA) H{sub 5}GeW{sub 10}MoVO{sub 40}.21H{sub 2}O has been synthesized for the first time by stepwise acidification and stepwise addition of solutions of the component elements. The product was characterized by chemical analysis, potentiometric titration, IR, UV, XRD and TG-DTA. The IR, UV and XRD indicate that H{sub 5}GeW{sub 10}MoVO{sub 40}.21H{sub 2}O possesses the Keggin structure. The TG-DTA curve shows the sequence of water loss in the acid, the amount of the loss, as well as the thermostability. The results of AC impedance measurement show that its proton conductivity is 3.58 x 10{sup -4} S cm{sup -1} at 18 deg. C and the activation energy for proton conduction is 31.82 kJ/mol.
- OSTI ID:
- 20889741
- Journal Information:
- Materials Research Bulletin, Vol. 40, Issue 2; Other Information: DOI: 10.1016/j.materresbull.2004.06.020; PII: S0025-5408(04)00343-5; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
Heteropoly acid functionalized fluoroelastomer with outstanding chemical durability and performance for vehicular fuel cells
A comparison of the interaction of nitric oxide with the heteropolytungstic acids H{sub 3}PW{sub 12}O{sub 40}, H{sub 0.5}Cs{sub 2.5}PW{sub 12}O{sub 40}, HMgPW{sub 12}O{sub 40}, H{sub 8}SiW{sub 11}O{sub 38}, H{sub 4}SiW{sub 12}O{sub 40}, and H{sub 10}CoW{sub 12}O{sub 42}