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随着能源消耗量不断增加,人们的环境保护意识日益加强,对清洁能源的需求变得迫切.质子交换膜燃料电池(PEMFC)是将化学燃料(氢气、甲醇或甲酸等)中的化学能直接转化为电能的发电装置,具有高效和洁净等优点,在未来可替代石油、天然气等化石燃料作为供能体.tPEMFC的高效运行取决于电池阳极反应(燃料氧化反应)和阴极反应(氧还原反应)的难易程度和速率,而针对两极反应高效催化剂的研发是提高PEMFC供电能力和效率的最佳途径.目前PEMFC中商用催化剂为铂基催化剂,然而铂储量低、价格高等问题严重阻碍了PEMFCs的推广应用,因此开发高效低成本的非铂催化剂是成功实现燃料电池商业化的关键.本文首次通过油相法制备了一种单分散性具备核壳结构的铁钯/钯(Fe Pd/Pd)纳米颗粒,均匀负载于炭黑上形成新型非铂基阴极氧还原催化剂.该催化剂对阴极氧还原反应展现出较高的催化活性和运行稳定性,明显优于目前的商用铂基催化剂.低制备成本和高催化性能使得该核壳Fe Pd/Pd纳米颗粒成为一种具有广阔前景的燃料电池电极反应催化剂,将有助于燃料电池的商业化进程.
With the continuous increase of energy consumption, people are increasingly aware of the environmental protection, and the demand for clean energy becomes more and more urgent.PEMFC is the direct chemical energy in chemical fuels (hydrogen, methanol or formic acid) Power generation devices that convert electricity into electricity have the advantages of being efficient and clean, and can replace fossil fuels such as oil and natural gas as energy providers in the future. The efficient operation of the PEMFC depends on the battery anode reaction (fuel oxidation reaction) and the cathode reaction (oxygen reduction Reaction) and the development of efficient catalysts for bipolar reaction is the best way to improve the power supply and efficiency of PEMFC.At present, commercial catalysts in PEMFC are platinum-based catalysts, however, the problems of low platinum reserves and high price are seriously hindered Therefore, developing non-platinum catalyst with high efficiency and low cost is the key to the successful commercialization of fuel cells.In this paper, a monodispersed Fe Pd / Pd nanoparticles uniformly supported on carbon black to form a novel non-platinum-based cathodic oxygen reduction catalyst. This catalyst exhibits cathodic oxygen reduction reaction High catalytic activity and operational stability are obviously better than the current commercial platinum-based catalysts.The low cost of preparation and high catalytic performance make the core-shell Fe Pd / Pd nanoparticles a promising catalyst for fuel cell electrode reaction, Will help fuel the commercialization process.