Development of highly crystalline nanoparticles synthesis process for energy andenvironmentalapplications

研究计划建立在基础研究的基础上，以开发用于能源和环境相关应用的高度结晶纳米材料的合成技术。我们合成了用于光电转换的高纯氧化铜（CuO，Cu 2 O）纳米粒子，并证实了它们的半导体性质。我们还构建了Cu_2O：C_60太阳能电池，并评估了它们的光效率。我们还开发了合成Fe-Pt和Ni-Pt纳米颗粒作为燃料电池催化电极的技术。我们证明了在活性炭上具有fct晶体结构的Fe-Pt纳米颗粒可以用作PEFC中Pt的替代候选物。此外，Ni 95 Pt 5和Ni 90 Pt 10在加氢反应中，尽管Pt浓度较低，但仍能与Pt颗粒发生相互作用。最后，我们还开发了合成技术，分别作为电磁波吸收剂和天线材料的Fe-Co和Fe-Ni颗粒，并测量了它们的高频性能。Fe-Co在几GHz范围内呈现出与粒径相关的共振峰。另一方面，Fe？肼辅助多元醇法合成的镍合金纳米粒子在MHz区域表现出形状依赖的低磁损耗。

Research plan was founded on the basic research to develop techniques to synthesize highly crystalline nanomaterials for energy and environmental related applications. We synthesized highly pure copper oxides（CuO、Cu2O）nanoparticles for photoelectric conversion and confirmed their semi-conductor properties. We also constructed Cu2O:C60solar cells and evaluated their photo efficiency. We also developed techniques to synthesize Fe-Pt and Ni-Pt nanoparticles as catalytic electrodes for fuel cells. We demonstrated that Fe-Pt nanoparticles with fct crystalline structure on activated carbon could be used as an alternative candidate for Pt in PEFCs. Furthermore, Ni95Pt5and Ni90Pt10performed comparably with Pt particles in hydrogenation reaction, in spite of low Pt concentration. Finally, we also developed techniques to synthesize Fe-Co and Fe-Ni particles as electromagnetic wave absorbers and antenna material, respectively, and measured their high frequency properties. Fe-Co exhibited particle size dependent resonance peak in the range of a few GHz. On the other hand, Fe?Ni alloy nanoparticles, synthesized by hydrazine assisted polyol process, exhibited shape dependent low magnetic lossinthe MHz region.