Single-Molecule Imaging of Iron-Phthalocyanine-Catalyzed Oxygen Reduction Reaction by in Situ Scanning Tunneling Microscopy

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Abstract

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.

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Journal

Title: ACS Nano

Abbreviated Title: ACS Nano

Publisher: American Chemical Society (ACS)

ISSN (Print): 1936-0851

ISSN (Electronic): 1936-086X

Publication date Created: September 02 2016

Publication date Created: September 27 2016

Publication date (Electronic): August 18 2016

Publication date (Print): September 27 2016

Volume: 10

Issue: 9

Pages: 8746-8750

Affiliations

[1 ]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

[2 ]University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China

Article

DOI: 10.1021/acsnano.6b04281

PubMed ID: 27508323

SO-VID: b6c0dd7f-4afa-4cdb-81fe-884cd044f75c

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