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Carbon Nanotubes with Cobalt Corroles for Hydrogen and Oxygen Evolution in pH 0–14 Solutions
Author(s) -
Li Xialiang,
Lei Haitao,
Liu Jieyu,
Zhao Xueli,
Ding Shuping,
Zhang Zongyao,
Tao Xixi,
Zhang Wei,
Wang Weichao,
Zheng Xiaohong,
Cao Rui
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201807996
Subject(s) - electrocatalyst , catalysis , cobalt , carbon nanotube , aqueous solution , oxygen evolution , chemistry , water splitting , adsorption , electrochemistry , chemical engineering , hydrogen , inorganic chemistry , materials science , nanotechnology , electrode , organic chemistry , photocatalysis , engineering
Water splitting is promising to realize a hydrogen‐based society. The practical use of molecular water‐splitting catalysts relies on their integration onto electrode materials. We describe herein the immobilization of cobalt corroles on carbon nanotubes (CNTs) by four strategies and compare the performance of the resulting hybrids for H 2 and O 2 evolution. Co corroles can be covalently attached to CNTs with short conjugated linkers (the hybrid is denoted as H1 ) or with long alkane chains ( H2 ), or can be grafted to CNTs via strong π–π interactions ( H3 ) or via simple adsorption ( H4 ). An activity trend H1 ≫ H3 > H2 ≈ H4 is obtained for H 2 and O 2 evolution, showing the critical role of electron transfer ability on electrocatalysis. Notably, H1 is the first Janus catalyst for both H 2 and O 2 evolution reactions in pH 0–14 aqueous solutions. Therefore, this work is significant to show potential uses of electrode materials with well‐designed molecular catalysts in electrocatalysis.