Premium
Efficient Electron Transfer Processes and Enhanced Electrocatalytic Activity of Cobalt(II) Porphyrin Anchored on Graphene Oxide
Author(s) -
Cho Sung,
Lim Jong Min,
You JungMin,
Jeon Seungwon,
Kim Dongho
Publication year - 2016
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.201500022
Subject(s) - chemistry , porphyrin , graphene , cobalt , oxide , photochemistry , electrocatalyst , electron transfer , recombination , inorganic chemistry , electrode , electrochemistry , nanotechnology , organic chemistry , biochemistry , gene , materials science
We investigated the electronic perturbation between graphene oxide and cobalt porphyrin to reveal the origin of the enhanced electrocatalytic activity of a hybrid complex using time‐resolved spectroscopic measurements and theoretical calculations. The impulsively generated charge‐separated state, GO − ‐(Co II APFP) + , undergoes fast charge recombination (<10 ps) between GO − and (Co II APFP) + moieties. This fast charge recombination is directly related to the quick neutralization of (Co II APFP) + , which shortens the dead time of inactive Co III APFP after the electrocatalytic reduction reaction. The fast transformation of inactive Co III APFP to active Co II APFP is an important factor in the enhanced electrocatalytic activity of the hybrid complex.