Abstract
The proton conductivity of the anodic ZrO2–WO3–SiO2 nanofilms prepared by anodizing of sputter-deposited Zr37W47Si16 alloy at several formation voltages for 1.8 ks in 0.1 mol dm−3 phosphoric acid electrolyte at 20oC has been examined below 250oC in various environments. The proton conductivity activated by thermal treatment at 250oC is not influenced by the presence of O2 and H2O in the atmosphere. However, the conductivity is enhanced by one order of magnitude in H2-containing atmosphere. The H2-induced conductivity enhancement is reversible; the enhanced conductivity is returned to an original value by exposing again in an O2-containing atmosphere.
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