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Nanoporous Anatase Thin Films as Fast Proton‐Conducting Materials
Author(s) -
Colomer M. T.
Publication year - 2006
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200500689
Subject(s) - nanoporous , anatase , materials science , conductivity , nafion , proton , membrane , thin film , proton exchange membrane fuel cell , relative humidity , chemical engineering , nanotechnology , electrochemistry , catalysis , chemistry , organic chemistry , electrode , biochemistry , physics , photocatalysis , quantum mechanics , engineering , thermodynamics
Nanoporous anatase thin films (see Figure) have been prepared via particulate sol–gel processes. The proton conductivity shows a sigmoidal dependence on relative humidity (RH). The highest value of proton conductivity was 3.78 × 10 –2 S cm –1 at 80 °C and 81% RH. The comparable proton conductivity, lower cost, and higher hydrophilicity of these thin films make them potential substitutes for Nafion membranes in proton‐exchange membrane fuel cells.