AI Article Synopsis
- The study focuses on covalently modifying tungsten disulfide (WS) with nickel-porphyrin (NiP) to create a new hybrid material (WS-NiP) for enhanced catalytic performance in the oxygen evolution reaction.
- The characterization of WS-NiP utilizes various advanced techniques including spectroscopy and electrochemical methods to analyze its effectiveness under both dark and illuminated conditions.
- The findings reveal that the material exhibits improved electrocatalytic activity due to the coordination of nickel centers with photoreceptive porphyrin chains, highlighting its potential for developing cost-effective alternatives to noble metal catalysts in water oxidation.
Article Abstract
Covalent functionalization of tungsten disulfide (WS ) with photo- and electro-active nickel-porphyrin (NiP) is reported. Exfoliated WS interfacing NiP moieties with 1,2-dithiolane linkages is assayed in the oxygen evolution reaction under both dark and illuminated conditions. The hybrid material presented, WS -NiP, is fully characterized with complementary spectroscopic, microscopic, and thermal techniques. Standard yet advanced electrochemical techniques, such as linear sweep voltammetry, electrochemical impedance spectroscopy, and calculation of the electrochemically active surface area, are used to delineate the catalytic profile of WS -NiP. In-depth study of thin films with transient photocurrent and photovoltage response assays uncovers photo-enhanced electrocatalytic behavior. The observed photo-enhanced electrocatalytic activity of WS -NiP is attributed to the presence of Ni centers coordinated and stabilized by the N motifs of tetrapyrrole rings at the tethered porphyrin derivative chains, which work as photoreceptors. This pioneering work opens wide routes for water oxidation, further contributing to the development of non-noble metal electrocatalysts.
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Article Synopsis
- The study focuses on covalently modifying tungsten disulfide (WS) with nickel-porphyrin (NiP) to create a new hybrid material (WS-NiP) for enhanced catalytic performance in the oxygen evolution reaction.
- The characterization of WS-NiP utilizes various advanced techniques including spectroscopy and electrochemical methods to analyze its effectiveness under both dark and illuminated conditions.
- The findings reveal that the material exhibits improved electrocatalytic activity due to the coordination of nickel centers with photoreceptive porphyrin chains, highlighting its potential for developing cost-effective alternatives to noble metal catalysts in water oxidation.
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