کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
190660 459703 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impedance analysis of nanostructured iridium oxide electrocatalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Impedance analysis of nanostructured iridium oxide electrocatalysts
چکیده انگلیسی

Impedance data were collected for nanostructured iridium oxide (NIROF) at potentials below those at which the oxygen evolution reaction commences. The measurements included thin oxide films covered by a protective Nafion™™ layer and thicker composite Nafion™™-oxide electrodes. The time constants for the low-frequency diffusion process were approximately the same for both types of electrodes, indicating diffusion in individual particles in the porous electrode rather than across the film. The diffusion process involves trapping of the diffusion species. The impedance data indicated that there were no significant variations in conductivity of the oxides with potential, as opposed to what appears to be the case for anodically formed iridium oxide films (AIROF). This is interpreted to reflect differences in electronic structure between NIROF and AIROF.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 55, Issue 26, 1 November 2010, Pages 7751–7760
نویسندگان
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