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Metal‐Organic Framework‐Derived Fe‐Doped Co 1.11 Te 2 Embedded in Nitrogen‐Doped Carbon Nanotube for Water Splitting
Author(s) -
He Bin,
Wang XinChao,
Xia LiXue,
Guo YueQi,
Tang YaWen,
Zhao Yan,
Hao QingLi,
Yu Tao,
Liu HongKe,
Su Zhi
Publication year - 2020
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202001434
Subject(s) - water splitting , electrocatalyst , oxygen evolution , cobalt , materials science , electrochemistry , catalysis , density functional theory , carbon nanotube , doping , inorganic chemistry , hydrogen , reversible hydrogen electrode , electrolyte , chemical engineering , nanotechnology , chemistry , electrode , computational chemistry , working electrode , optoelectronics , organic chemistry , photocatalysis , engineering , biochemistry
A rational design is reported of Fe‐doped cobalt telluride nanoparticles encapsulated in nitrogen‐doped carbon nanotube frameworks (Fe‐Co 1.11 Te 2 @NCNTF) by tellurization of Fe‐etched ZIF‐67 under a mixed H 2 /Ar atmosphere. Fe‐doping was able to effectively modulate the electronic structure of Co 1.11 Te 2 , increase the reaction activity, and further improve the electrochemical performance. The optimized electrocatalyst exhibited superior hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performances in an alkaline electrolyte with low overpotentials of 107 and 297 mV with a current density of 10 mA cm −2 , in contrast to the undoped Co 1.11 Te 2 @NCNTF (165 and 360 mV, respectively). The overall water splitting performance only required a voltage of 1.61 V to drive a current density of 10 mA cm −2 . Density function theory (DFT) calculations indicated that the Fe‐doping not only afforded abundant exposed active sites but also decreased the hydrogen binding free energy. This work provided a feasible way to study non‐precious‐metal catalysts for an efficient overall water splitting.