Selective electrodeposition of PbO2 on anodised-polycrystalline titanium
作者： D. Devilliers , T. Baudin , M.T. Dinh Thi , E. Mahé
DOI: 10.1016/J.ELECTACTA.2004.01.018
关键词: Electron diffraction 、 Analytical chemistry 、 Materials science 、 Electron backscatter diffraction 、 Lead oxide 、 Anodizing 、 Crystal growth 、 Titanium 、 Oxide 、 Crystallite 、 Crystallography
摘要: Electrochemical experiments on titanium electrodes were coupled with electron backscattered diffraction (EBSD) experiments. The substrates thermally treated and electropolished in order to have flat reproducible polycrystalline surfaces, leading EBSD orientation mapping. Afterwards, the samples anodised by a galvanostatic procedure. It was shown that electrodeposition of PbO2 from 0.5 M Pb(NO3)2+2.5 HNO3 solution occurs selectively near {0 0 1} grains, whereas lead all whatever their orientation. These results are discussed, taking into account fact oxide layers thinner than other grains. concluded is observed locally Ti/TiO2 for (i) cathodic metals at low overvoltage; (ii) anodic PbO2, potentiostatic or conditions.
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