Xiangqun Zeng, Hang Cong, Nan Jiang, Qiang Wang, Jiao-Jing Shao, Jie Zhao* and Dongjing Liu*,
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引用次数: 0
Abstract
Developing low-cost and high-efficiency OER electrocatalysts holds the key to hydrogen production from electrochemical water splitting. In this study, cobalt sulfide hollow nanospheres derived from ZIF-67 were immobilized on a potato starch-derived carbon aerogel (Co–S@CA) using a solvothermal method followed by annealing. The synergistic effects of Co–S and three-dimensional carbon aerogel (CA) facilitate rapid charge transfer, high electrochemical surface area, and better electronic structure, enhancing the electrochemical activity of the composite. The synthesized Co–S@CA catalyst exhibited remarkable catalytic performance with an overpotential of 291 mV at 10 mA cm–2 and a Tafel slope of 61.8 mV dec–1, outperforming the commercial RuO2 catalyst. The Co–S@CA catalyst demonstrates excellent stability with negligible increase in overpotential after 60 h of a stability test. Density functional theory (DFT) calculations further supported the experimental results, showing that the interfacial charge transfer between Co–S and carbon generates a built-in electric field and upshifts the d-band center, enhancing charge-transfer capability and lowering the theoretical overpotential for the OER. These improvements significantly boost the catalytic activity. This study highlights the potential of Co–S@CA composites as highly efficient electrocatalysts for renewable energy applications.
期刊介绍:
Langmuir is an interdisciplinary journal publishing articles in the following subject categories:
Colloids: surfactants and self-assembly, dispersions, emulsions, foams
Interfaces: adsorption, reactions, films, forces
Biological Interfaces: biocolloids, biomolecular and biomimetic materials
Materials: nano- and mesostructured materials, polymers, gels, liquid crystals
Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry
Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals
However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do?
Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*.
This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).