TY - JOUR
T1 - Synthesis, redox properties, and catalytic hydrogen gas generation of porphycene cobalt complexes
AU - Zhou, Zihan
AU - Koide, Taro
AU - Shiota, Yoshihito
AU - Yano, Yoshio
AU - Xu, Ning
AU - Ono, Toshikazu
AU - Shimakoshi, Hisashi
AU - Yoshizawa, Kazunari
AU - Hisaeda, Yoshio
N1 - Funding Information:
This work was partially supported by JSPS KAKENHI Grant Number 19K22204 (Grant-in-Aid for Challenging Exploratory Research for Y. H.) and by a project, JPNP14004, of the New Energy and Industrial Technology Development Organization (NEDO). T. K. is grateful for the financial support from the Casio Science Promotion Foundation and from The Hitachi Global Foundation.
Publisher Copyright:
© 2022 World Scientific Publishing Company.
PY - 2022
Y1 - 2022
N2 - A new meso-tetrakis(3,5-di-tert-butylphenyl) substituted porphycene and its cobalt complex were synthesized and characterized. Several meso-tetraarylporphycene cobalt complexes having different substituents showed catalytic activity for the hydrogen gas evolution reaction (HER) in the presence of trifluoroacetic acid (TFA) under electrochemical reductive conditions. The electrochemical potential of the HER was -1.50V vs. Ag/AgCl in THF. The active species of this reaction were determined to be the ligand reduced species of Co(II) porphycenes. The catalytic efficiencies of the cobalt complexes of meso-aryl substituted porphycenes and meso-tetraphenylporphyrin were compared and meso-tetraphenyl porphycene cobalt complex exhibited the best current efficiency of 72%. Based on these experimental results and theoretical calculations, we proposed a possible HER mechanism of this system.
AB - A new meso-tetrakis(3,5-di-tert-butylphenyl) substituted porphycene and its cobalt complex were synthesized and characterized. Several meso-tetraarylporphycene cobalt complexes having different substituents showed catalytic activity for the hydrogen gas evolution reaction (HER) in the presence of trifluoroacetic acid (TFA) under electrochemical reductive conditions. The electrochemical potential of the HER was -1.50V vs. Ag/AgCl in THF. The active species of this reaction were determined to be the ligand reduced species of Co(II) porphycenes. The catalytic efficiencies of the cobalt complexes of meso-aryl substituted porphycenes and meso-tetraphenylporphyrin were compared and meso-tetraphenyl porphycene cobalt complex exhibited the best current efficiency of 72%. Based on these experimental results and theoretical calculations, we proposed a possible HER mechanism of this system.
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U2 - 10.1142/S108842462250016X
DO - 10.1142/S108842462250016X
M3 - Article
AN - SCOPUS:85125740783
SN - 1088-4246
JO - Journal of Porphyrins and Phthalocyanines
JF - Journal of Porphyrins and Phthalocyanines
ER -