Physical Chemistry Studies of Proton Conduction in Heteropoly Acids

Fanqin Meng, James Horan, Jennifer L. Malers, Steven F. Dec, Andrew M. Herring, John A. Turner

Research output: Contribution to conferencePaperpeer-review

2 Scopus Citations


Heteropoly acids (HPA) are promising PEM materials because they have exhibited exceptional proton conductivity not only at ambient temperature, but also at elevated temperatures without external humidification. A library of HPA was synthesized where charge, shape, and hydration state were varied, and the proton conduction structures in the solid state was studied. At ambient conditions, the HPA secondary structure was a "pseudo-liquid" phase and explained the high conductivity of these materials at room temperature. DRIFTS spectra of the free acid HPA showed information on the bonding of water and protons and also showed changes in the outer anion bands as these bonds became more or less involved in bonding to the secondary structure. The activation energy matched the H-bond strength for 21-HAs2W and so presumably all the secondary structure is involved in proton transport and the same is almost true for 21-HP2W. This is an abstract of a paper presented at the ACS Fuel Chemistry Meeting (Washington, DC Fall 2005).

Original languageAmerican English
Number of pages2
StatePublished - 2005
Event230th ACS National Meeting - Washington, D.C.
Duration: 28 Aug 20051 Sep 2005


Conference230th ACS National Meeting
CityWashington, D.C.

NREL Publication Number

  • NREL/CP-560-39374


  • heteropoly acids
  • proton conduction


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