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Updated: Jan 25, 2026

Molecular Evolution of the Tre Recombinase
Published on: May 29, 2008
Molecular Evidence for the Catalytic Process of Cobalt Porphyrin Catalyzed Oxygen Evolution Reaction in Alkaline
Xiang Wang1,2, Zhen-Feng Cai1,2, Dong Wang1,2
1CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.
Abstract:
We report an electrochemical scanning tunneling microscopy (ECSTM) study of the 5,10,15,20-tetraphenyl-21 H,23 H-porphyrin cobalt(II) (CoTPP) catalyzed oxygen evolution reaction (OER). A highly ordered self-assembled monolayer of CoTPP is formed on the Au(111) electrode. Cyclic voltammetry results show the OER activity of the electrode is enhanced with the increasing alkalinity of the electrolytes. The CoTPP molecules appear as two symmetric bright spots in STM images in alkaline solution, which is in sharp contrast to that in acidic solution. The molecular contour changes are attributed to the formation of the CoTPP-OH- species before OER, which is further confirmed by UV-vis absorption spectroscopy. In situ ECSTM results reveal the evolution from the CoTPP-OH- species to CoTPP molecules during OER.
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