|Budget Amount *help
¥41,860,000 (Direct Cost: ¥32,200,000、Indirect Cost: ¥9,660,000)
Fiscal Year 2017: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2016: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2015: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
Fiscal Year 2014: ¥14,820,000 (Direct Cost: ¥11,400,000、Indirect Cost: ¥3,420,000)
|Outline of Final Research Achievements
Quantitative and direct evaluation of the surface potential and charge density of electrodes, determined by the adsorption of ions and chemical reactions has been one of the central questions in electrochemistry. Surface forces measurements have been regarded as one of the promising tools for evaluating them based on an analysis of the electric double layer forces. We developed a new electrochemical surface forces apparatus (EC-SFA), which can perform the measurement on forces between symmetrical electrode surfaces, using the twin-path SFA. Using this apparatus, we evaluated the surface potential, charge density and ion adsorption on various electrodes (Au, Pt etc). The counterion distribution between the Stern layer and the diffused layer of the electric double layer was directly determined using ferrocene-modified Au electrode. The process from the proton adsorption to hydrogen evolution on Pt electrodes was also monitored by varying the applied potential for the first time.