MXene boosted MOF-derived cobalt sulfide/carbon nanocomposites as efficient bifunctional electrocatalysts for OER and HER
Farooq, K; Murtaza, M; Yang, Z; et al.Waseem, A; Zhu, Y; Xia, Y
Date: 26 April 2024
Article
Journal
Nanoscale Advances
Publisher
Royal Society of Chemistry
Publisher DOI
Abstract
The development of effective bifunctional electrocatalysts that can realize water splitting to produce
oxygen and hydrogen through oxygen evolution reaction (OER) and hydrogen evolution reaction (HER)
is still a great challenge to be addressed. Herein, we report a simple and versatile approach to fabricate
bifunctional OER and HER ...
The development of effective bifunctional electrocatalysts that can realize water splitting to produce
oxygen and hydrogen through oxygen evolution reaction (OER) and hydrogen evolution reaction (HER)
is still a great challenge to be addressed. Herein, we report a simple and versatile approach to fabricate
bifunctional OER and HER electrocatalysts derived from ZIF67/MXene hybrids via sulfurization of the
precursors in hydrogen sulfide gas atmosphere at high temperatures. The as-prepared CoS@C/MXene
nanocomposites were characterized using a series of technologies including X-ray diffraction, gas
sorption, scanning electronic microscopy, transmission electronic microscopy, energy dispersive
spectroscopy, and X-ray photoelectron spectroscopy. The synthesized CoS@C/MXene composites are
electrocatalytically active in both HER and OER, and the CSMX-800 composite displayed the highest
electrocatalytic performance towards OER and HER among all the produced samples. CSMX-800
exhibited overpotentials of 257 mV at 10 mA cm−2 for OER and 270 mV at 10 mA cm−2 for HER.
Moreover, it also possesses small Tafel slope values of 93 mV dec−1 and 103 mV dec−1 for OER and HER,
respectively. The enhanced electrocatalytic performance of the MXene-containing composites is due to
their high surface area, enhanced conductivity, and faster charge transfer. This work demonstrated that
CoS@C/MXene based electrocatalyst has great potential in electrochemical water splitting for hydrogen
production, thus reducing carbon emissions and protecting the environment.
Engineering
Faculty of Environment, Science and Economy
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