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以碳纳米管(CNT)为原料,通过负载维生素B12,简单热解得到了一种氮掺杂碳纳米管(N/CNT)负载低含量Co3O4纳米颗粒的氧还原电催化剂(Co3O4@N/CNT)。得益于均匀分散的Co3O4纳米颗粒以及氮掺杂,Co3O4@N/CNT表现出了优异的氧还原催化性能,其半波电位达到了0.844 V (vs RHE),超越了商业Pt/C (0.820 V (vs RHE))。与Pt/C相比,基于Co3O4@N/CNT组装的锌-空气电池表现出了更优的放电性能和循环稳定性。 相似文献
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不同形貌的Cu_2O:可控合成及光学性质(英文) 总被引:1,自引:0,他引:1
Cuprous oxide(Cu2O) hexapodal branch structure with high uniformity was prepared by a solution phase route using sodium dodecyl sulfate as a capping agent. The shapes of Cu2O crystal(flower-like structure, nanocube and nanoplate) were tuned by varying species and concentrations of surfactants to control the growth rate on different crystal planes of Cu2O. Cu2O nanostructures were characterized by UV-Vis spectroscopy, XRD, TEM and SEM. XRD result shows that the obtained Cu2O belongs to cubic phase. TEM and SEM results demonstrate that specie and concentration of surfactants play a key role in the formation of various morphologies of Cu2O. The formation mechanism is discussed. Moreover, the optical properties of the obtained Cu2O are shape-dependent. 相似文献
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Surface Modification of Nano-SiO_2 by Grafting PMMA/PBA 总被引:2,自引:0,他引:2
IntroductionThankstotheirsizesatnano level ,thenano particleshavesomenewandpreternaturalpropertiesdifferentfromnormalmaterials ,andtheycanbeappliedinmanyfieldssuchascatalysts,lightfiltration ,lightabsorbing ,medicine ,magneticmediumandnewmaterialsaswell.1,2Itisalsorecognizedasoneofthemostprosperousmateri alsinthe 2 1century .Nowadays ,scientistsandre searcherspaymoreattentiontopolymer nano inorganiccompounds,becausepolymeriseasytoprocess ,anditcanavoidtheoxidationandcoagulationofthenano parti … 相似文献
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制备了2种锌卟啉天线分子P2与P3,并通过自组装的方法成功地将这些天线分子应用到了染料敏化太阳能电池之中。与传统的D-π-A结构的染料相比,这种策略显示出了明显的优势:可以避免复杂的合成步骤,还可以通过调节天线分子和锚固基团的结构去改善染料的光子捕获能力并减少电荷复合行为。当4-吡啶-4-基苯甲酸(A)作为锚固基团时,经过分子自组装之后,基于A-P2的电池器件显示出了1.68%的转换效率,开路电压为526 mV,短路电流密度为5.39 mA·cm-2,这充分说明了自组装策略在染料敏化太阳能电池中得到了很好的应用。而基于A-P3的电池器件能量转换效率只有0.79%,这可能主要是因为天线分子P3较大的位阻减小了染料吸附量的原因造成的。我们另外也测试比较了它们在光学、电化学、光伏性能等方面的差异。 相似文献