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- W2035439968 abstract "Gasochromic palladium doped peroxopolytungstic acid (Pd:P-PTA) films have been prepared using dip-coating deposition from peroxopolytungstic acid (P-PTA) sols into which PdCl2 was added in molar ratios Pd:W=1:125, 1:100, 1:53, and 1:40. These films exhibit reversible colouring/bleaching changes when exposed to hydrogen or hydrogen/argon mixture (4%) and air, alternatively. Gasochromically coloured and bleached films were characterised using in-situ Fourier transform infrared (FT-IR) spectroscopy. The vibrational modes of as-deposited, coloured and bleached films were assigned and the polaron absorption, which characterises the IR spectra of coloured films, was detected. Colouring/bleaching kinetics of films exposed to H2 and H2/Ar mixture as a function of the concentration of the catalyst and temperature of heat-treatment is reported. Proton (σpr) and electronic (σel) conductivities determined from impedance spectra revealed an increase in σel from 10−5 S cm−1 in bleached state, to 10−3 S cm−1 in coloured state, while σpr remained constant (10−2 S cm−1)." @default.
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- W2035439968 date "1998-08-01" @default.
- W2035439968 modified "2023-10-12" @default.
- W2035439968 title "Gasochromic effect of palladium doped peroxopolytungstic acid films prepared by the sol-gel route" @default.
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- W2035439968 doi "https://doi.org/10.1016/s0925-4005(98)00241-x" @default.
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