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Phase‐Selective Syntheses of Cobalt Telluride Nanofleeces for Efficient Oxygen Evolution Catalysts
Author(s) -
Gao Qiang,
Huang ChuanQi,
Ju YiMing,
Gao MinRui,
Liu JianWei,
An Duo,
Cui ChunHua,
Zheng YaRong,
Li WeiXue,
Yu ShuHong
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201701998
Subject(s) - overpotential , oxygen evolution , catalysis , cobalt , telluride , noble metal , chemistry , nanomaterials , phase (matter) , rational design , chemical engineering , nanotechnology , combinatorial chemistry , materials science , inorganic chemistry , electrochemistry , organic chemistry , electrode , engineering
Cobalt‐based nanomaterials have been intensively explored as promising noble‐metal‐free oxygen evolution reaction (OER) electrocatalysts. Herein, we report phase‐selective syntheses of novel hierarchical CoTe 2 and CoTe nanofleeces for efficient OER catalysts. The CoTe 2 nanofleeces exhibited excellent electrocatalytic activity and stablity for OER in alkaline media. The CoTe 2 catalyst exhibited superior OER activity compared to the CoTe catalyst, which is comparable to the state‐of‐the‐art RuO 2 catalyst. Density functional theory calculations showed that the binding strength and lateral interaction of the reaction intermediates on CoTe 2 and CoTe are essential for determining the overpotential required under different conditions. This study provides valuable insights for the rational design of noble‐metal‐free OER catalysts with high performance and low cost by use of Co‐based chalcogenides.