シリカの濃度傾斜をもつ酸素発生用電極触媒皮膜 -酸化イリジウム-コロイド状シリカ/チタン基体系- [in Japanese] Coated Electrocatalyst Layer for Oxygen Evolution with Gradient Silica Concentration -Iridium Oxide-Colloidal Silica/Titanium Substrate System- [in Japanese]
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Colloidal silica-dispersed IrO<sub>2</sub> films were formed on a titanium substrate by thermal decomposition and examined by depth profiling with a scanning electron microscope and electron probe microanalyzer. Catalyst films consisted of triplex layers with an iridium oxide-enriched outside, a silica-enriched inside, and an intermediate section where the two oxides interpenetrated. Colloidal silica supplied at the surface of films thus moves easily through the layers inward to form further silica-enriched layers. In other words, silica gradient concentrations are built into films; such gradient concentrations appear to give anode films their long service life.
- Jitsumu Hyomen Gijutsu
Jitsumu Hyomen Gijutsu 49(3), 302-304, 1998-03-01
The Surface Finishing Society of Japan