成果報告書詳細
管理番号100013793
タイトル*平成20年度中間年報 燃料電池先端科学研究事業1
公開日2009/4/24
報告書年度2008 - 2008
委託先名独立行政法人産業技術総合研究所固体高分子形燃料電池先端基盤研究センター
プロジェクト番号P08001
部署名燃料電池・水素技術開発部
和文要約以下本編抜粋:表面増強ラマン分光法においては、昨年度、金電極表面上の有機単分子層において表面増強ラマンスペクトルの確認が出来たことを受け、今年度は白金触媒表面上の表面増強ラマンスペクトルの検出の研究を進めた。
英文要約Title: Fuel Cell Cutting-Edge Science Research Project (FY2008-FY2009) FY2008 Annual Report : (1) Electrode Catalyst : Observation of SERS (surface enhanced Raman scattering) spectra at organic monolayer on Au plasmonic substrate was succeeded. In situ SERS measurement at pyridine/Au plasmonic electrode interface was also achieved by changing the spectroelectrochemical cell design. Trial to observe SERS from a Pt plasmonic substrate has been carried out. Although the excitation of the plasmonic standing wave in Pt-deposited inverse pyramid was confirmed by optical reflection spectroscopy as well as that at Au plasmonic substrates, clear SERS signals from Pt plasmonic substrates have not been observed yet. This may be due that the excitation laser wavelength was not optimized to plasmonics on massive Pt. In addition to the continuous trials to observe SERS from Pt plasmonic substrate, atomically controlled Pt skin on Au plasmonic substrate will be prepared to observe the SERS from Pt surface. Various simulations including FTDT for design of the novel plasmonic substrate are in progress to construct the time-resolved SERS measurement system. : Meso-scale materials have been investigated to understand the electrochemical and electrocatalytic reactions in nano-space. Mesoporous carbon (MC) powder with 3D ordered pore structure inside the carbon particles has been prepared as a catalyst support and <1nm Pt nanoclusters were successfully deposited inside and outside of the mesopores. Furthermore, the preparation of vertically oriented MC free-standing film, carbon aerogel materials in which the interparticle pore diameter was controlled, and mesoporous Nb-doped TiO2 powders, was succeeded as nanoscale model catalyst supports. : (2) Polymer Electrolyte Materials : Our research has been making significant progress in the research field of morphological study. We improved AFM system to apply high temperature and high relative humidity condition. Using the improved e-AFM technique, significantly different hydration and thermal behaviors between Nafion and HC-type membranes were found under various environmental conditions. We also established an observation technique for cross-sectional samples, to evaluate the conductive networks in the bulk of the membranes. These improvements will make the e-AFM a powerful tool for characterizing PEMs. : PFG-NMR method was applied to evaluate diffusion coefficient of the water/proton in PEMs. Using this method, we have succeeded in the characterization of freezing behavior of water in the PEMs, and demonstrated that small amount of frozen-water exists in HC-type membrane. Furthermore, using 1H time-dependent self-diffusion coefficients technique, we found large-scaled (sub -m) structure in Nafion. This technique is promising for deep insight of membrane morphology. : The water dynamics and water channel in Nafion and HC-type membranes were also studied by NMR methods and molecular dynamics.
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