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用纖維素基的碳氣凝膠作PEM燃料電池電極的催化劑載體 已有1人參與
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Use of cellulose-based carbon aerogels as catalyst support for PEM fuel cell electrodes: Electrochemical characterization, Journal of Power Sources 166 (2007) 104-111. 影響因子:5.211 摘要:New nanostructured carbons have been developed through pyrolysis of organic aerogels, based on supercritical drying of cellulose acetate gels. These cellulose acetate-based carbon aerogels (CA) are activated by CO2 at 800℃and impregnated by PtCl62−; the platinumsalt is then chemically or electrochemically reduced. The resulting platinized carbon aerogels (Pt/CA) are characterized with transmission electron microscopy (TEM) and electrochemistry. The active area of platinum is estimated from hydrogen adsorption/desorption or CO-stripping voltammetry: it is possible to deposit platinum nanoparticles onto the cellulose acetate-based carbon aerogel surface in significant proportions. The oxygen reduction reaction (ORR) kinetic parameters of the Pt/CA materials, determined from quasi-steady-state voltammetry, are comparable with that of Pt/Vulcan XC72R.These cellulose acetate-based carbon aerogels are thus promising electrocatalyst support for PEM application. 摘要中文翻譯:通過熱解有機氣凝膠,超臨界干燥的醋酸纖維素凝膠,研制了新的納米結構的碳。這些醋酸纖維素基的碳氣凝膠在800℃CO2氣氛下活化并且用PtCl62-浸泡,然后用化學或電化學的方法將鉑鹽還原。用TEM和電化學表征了鍍鉑的碳氣凝膠。用氫氣吸附/解吸附或CO-溶出伏安法評估鉑的活化面積:將大量的鉑納米顆粒沉積在醋酸纖維素基碳氣凝膠的表面是可能的。Pt/CA材料的還原反應動力學參數(shù),由準穩(wěn)態(tài)伏安法測定,可與Pt/VulcanXC72R相比較。因此,醋酸纖維素基的碳氣凝膠材料是一種有前景的電極催化劑載體在PEM應用中。 想獲得更多資源可點擊鏈接http://www.tjdrfk.com/news 圖片9.jpg 圖片6.jpg 圖片7.jpg 圖片8.jpg |
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