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MOF‐Derived Ni‐Doped CoS 2 Grown on Carbon Fiber Paper for Efficient Oxygen Evolution Reaction
Author(s) -
Xie Zhiqiang,
Tang Hui,
Wang Ying
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201801106
Subject(s) - overpotential , tafel equation , oxygen evolution , electrocatalyst , water splitting , catalysis , materials science , chemical engineering , electron transfer , hydrogen production , inorganic chemistry , chemistry , electrode , electrochemistry , organic chemistry , photocatalysis , engineering
The efficiency of water splitting for clean production of hydrogen energy is largely limited by the sluggish kinetics of the oxygen evolution reaction (OER). Thus, it is of great significance but still remains challenging to develop stable, efficient, and economical catalysts that could provide a high current density at a low overpotential. In this work, we report an economical synthesis of metal organic framework (MOF) derived Ni‐doped CoS 2 , grown on carbon fiber paper (Ni‐doped CoS 2 /CFP), as a new OER catalyst with high catalytic activity and durability. The binder‐free Ni‐doped CoS 2 /CFP electrode exhibits a very low overpotential of 270 mV (versus RHE) at 10 mA cm −2 , a Tafel slope of 79 mV dec −1 , and high durability during 3000 cyclic voltammetry sweeps. Such a remarkable OER performance exceeds that of most of noble‐metal‐free materials and even commercial IrO 2 . The significantly improved OER performance is largely ascribed to the synergic effects of Ni doping and the conductive CFP catalyst support, leading to an enhanced electron and mass transfer during the OER process. We believe that the as‐prepared Ni‐doped CoS 2 /CFP material holds great promise as an economical OER electrocatalyst for energy‐related applications.