文档介绍：
光化学制备氧化铱纳米粒子过程中添加剂
对形貌及其电催化性能的影响
许頔,金涛,郭欣,项民,刁鹏
(北京航空航天大学材料科学与工程学院,北京 100191)
摘
要:通过引入紫外光照,加速 IrCl3在弱碱性环境中的水解,加入一定量的葡萄糖或 H2O2作为添加剂,
合成了氧化铱(IrOx)纳米团聚物。在反应过程中,定时取样采集紫外-可见消光光谱,对光谱的演变过程
进行分析,推测反应的历程。结果显示,加入葡萄糖会显著减缓 IrOx的生成,而 H2O2对这一过程则无明显
影响。反应历程上的差异导致上述两个体系的产物具有完全不同的形貌。透射电镜照片显示,向反应溶液
中加入葡萄糖或 H2O2,可分别得到准球形和网状的 IrOx纳米团聚物,团聚物均由粒径不足 2 nm 的小颗粒聚
集而成。而对这两种 IrOx纳米团聚物电化学测试结果表明,对于析氧反应,准球形团聚物比网状团聚物展
现出更高的电催化活性。
关键词:氧化铱;纳米颗粒;紫外光照;葡萄糖;过氧化氢
中图分类号:O644
文献标志码:A
Effect of additives on morphology and electrocatalytic
activity of photochemically synthesized iridium oxide
nanoparticles
Xu Di, Jin Tao, Guo Xin, Xiang Min, Diao Peng
(School of Materials Science and Engineering, Beihang University, Beijing , China 100191)
Abstract:Iridium oxide nanoaggregates have been fabricated by accelerating the hydrolysis of IrCl3 in
alkalescent condition with glucose or hydrogen peroxide as the additive, through the introduction of
UV irradiation. During the reaction, the UV-Vis extinction spectra of the reaction solutions were
acquired at fixed intervals, and the evolution of the spectra was analyzed to interpret the reaction
process. The results indicate that glucose can significantly retard the generation of IrOx, while H2O2 has
little effect on this process. The difference in reaction process between these two systems results in
products with different morphologies. Transmission