通过原位扫描隧道显微镜对铁酞菁催化氧还原反应的单分子成像。
Single-Molecule Imaging of Iron-Phthalocyanine-Catalyzed Oxygen Reduction Reaction by in Situ Scanning Tunneling Microscopy.
机构信息
CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) , Beijing 100190, People's Republic of China.
University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China.
出版信息
ACS Nano. 2016 Sep 27;10(9):8746-50. doi: 10.1021/acsnano.6b04281. Epub 2016 Aug 18.
We report herein an in situ electrochemical scanning tunneling microscopy (ECSTM) investigation of iron-phthalocyanine (FePc)-catalyzed oxygen reduction reaction (ORR). A highly ordered FePc adlayer is revealed on a Au(111) electrode. The center ions in the FePc adlayer show uniform high contrast in an oxygen-saturated electrolyte, which is attributed to the formation of an FePc-O2 complex. In situ STM results reveal the sharp contrast change upon shifting the electrode potential to trigger the ORR. Theoretical simulation has supplied further evidence for the contrast difference of the adsorbed FePc species.
本文报告了原位电化学扫描隧道显微镜（ECSTM）对铁酞菁（FePc）催化氧还原反应（ORR）的研究。在 Au(111)电极上揭示了高度有序的 FePc 吸附层。在氧饱和电解质中，FePc 吸附层中的中心离子显示出均匀的高对比度，这归因于 FePc-O2 配合物的形成。原位 STM 结果表明，在电极电势发生变化以引发 ORR 时，对比度会发生明显变化。理论模拟为吸附的 FePc 物种的对比度差异提供了进一步的证据。
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