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燃料電池陰極催化劑綜述
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今年年初,Wiley邀請老板Prof. N. Alonso-Vante寫一篇燃料電池i陰極催化劑綜述,最近在physica status solidi (b) Vol. 245/9/2008, page 1792-1806發(fā)表,這里和大家分享下! This review covers the electrocatalytic activities, the corresponding influence factors and the synthesis methods of non-precious metal electrocatalysts towards oxygen reduction reaction (ORR) for fuel cell systems. In particular, the chalcogenides and the macrocycles containing Co or Fe metals have been focused. Due to the price and the high scarcity of Pt metal, the Co- and Fe-based chalcogenides are potentially interesting substitutes of Pt although they still show lower catalytic activities for ORR and lower electrochemical and chemical stability in the present fuel cell electrolytes. Compared to Pt electrocatalysts, the Co- and Fe-based macrocycles, such as TMPP, TPP, Pc and TAA, are among the most promising substitutes for Pt, because of their comparable catalytic activities towards ORR and the higher insensitivity to methanol (in direct methanol fuel cells-DMFC) although they still have some drawbacks, namely lower stability and shorter durability. Novel catalyst synthesis methods, modification techniques of catalyst as well as supporting substrates are expected to be developed in the future to satisfy the requirements of commercial fuel cells. http://home.imhb.cn/indexCF/home ... spx?MSAutoID=133444 [ Last edited by yjfeng2000 on 2008-9-1 at 02:16 ] |
燃料電池 電化學(xué) | 學(xué)術(shù) | 燃料電池 |
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本產(chǎn)品純度高、粒徑小、分布均勻,比表面積大、高表面活性,松裝密度低,該產(chǎn)品具有無毒、無味、活性好、的特點。納米硅粉末是新一代的光電半導(dǎo)體材料,具有較寬的間隙能半導(dǎo)體,也是高功率的光源材料。在鋰電池中的應(yīng)用:由于納米硅對與鋰電池的高吸收率,將納米硅用與鋰電池可以大幅度提高鋰電池的容量(理論可以達到4000mA/h),同時利用世界先進技術(shù),將納米硅粉表面包覆石墨,組成Si-C復(fù)合材料,可以有效的降低由于硅吸收鋰離子時的膨脹,同時可以加大與電解液的親和力,易與分散,提高循環(huán)性能。 咨詢電話:王先生15256580259 QQ522062268 Kai_xin_126@163.com |
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