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专业: 碳素材料与超硬材料

[交流] 用纤维素基的碳气凝胶作PEM燃料电池电极的催化剂载体已有1人参与

Use of cellulose-based carbon aerogels as catalyst support for PEM fuel cell electrodes: Electrochemical characterization, Journal of Power Sources 166 (2007) 104-111. 影响因子：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.
摘要中文翻译：通过热解有机气凝胶，超临界干燥的醋酸纤维素凝胶，研制了新的纳米结构的碳。这些醋酸纤维素基的碳气凝胶在800℃CO2气氛下活化并且用PtCl62-浸泡，然后用化学或电化学的方法将铂盐还原。用TEM和电化学表征了镀铂的碳气凝胶。用氢气吸附/解吸附或CO-溶出伏安法评估铂的活化面积：将大量的铂纳米颗粒沉积在醋酸纤维素基碳气凝胶的表面是可能的。Pt/CA材料的还原反应动力学参数，由准稳态伏安法测定，可与Pt/VulcanXC72R相比较。因此，醋酸纤维素基的碳气凝胶材料是一种有前景的电极催化剂载体在PEM应用中。
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