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以天然来源的生物质百香果内膜为原料,采用热解炭化-KOH活化的方法制备出比表面积大、孔隙结构好的纳米片生物炭(BXG-AC),并通过扫描电子显微镜(SEM)、X射线光电子能谱(XPS)等方法对所制备催化剂进行了元素组成和微观形貌表征,采用循环伏安扫描(CV)和线性伏安扫描(LSV)对材料的电化学性能进行分析。结果表明,百香果内膜生物炭经过KOH活化后,在0.1 mol/L的磷酸缓冲液(PBS)中表现出良好的电催化活性。将所制备的催化剂应用于单室MFCs阴极时,对应的MFC最大功率密度达1153.3 mW/m2,略低于Pt/C的1214.3 mW/m2,且此MFC运行60 d后,其性能未见明显降低。表明BXG-AC催化剂具有显著的催化活性和稳定性,为开发高效MFC阴极催化剂提供了新途径。 相似文献
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Nitrogen and Boron Co-Doped Carbon Nanotubes Embedded with Nickel Nanoparticles as Highly Efficient Electromagnetic Wave Absorbing Materials 下载免费PDF全文
Due to the limitations of impedance matching and attenuation matching,carbon nanotubes(CNTs)employed alone have a weak capacity to attenuate electromagnetic wave(EMW)energy.In this work,B and N co-doped CNTs with embedded Ni nanoparticles(Ni@BNCNTs)are fabricated via an in situ doping method.Compared with a sample without B doping,Ni@BNCNTs demonstrate a superior EMW absorption performance,with all minimum reflection loss values below?20 dB,even at a matching thickness of 1.5 mm.The experimental and theoretical calculation results demonstrate that B doping increases conduction and polarization relaxation losses,as well as the impedance matching characteristic,which is responsible for the enhanced EMW absorption performance of Ni@BNCNTs. 相似文献
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