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• W3216961467 abstract "While the ever-increasing energy crisis for sustainable and renewable energy sources has prompted the development of innovative materials for photoelectrochemical water oxidation, the techniques to enhance solar-to-hydrogen efficiency and provide long-term stability remain significant challenges. In this work, we report a ternary material system based on reduced graphene oxide (r-GO) and copper–tetracyanoquinodimethane (Cu–TCNQ) decorated on anodically aligned TiO2 nanotubes (TONTs), which simultaneously improve the charge separation and water oxidation kinetics. r-GO and Cu–TCNQ were sequentially decorated on the surface of TONTs by a facile electrophoretic deposition method and marked in brief as TONTs/r-GO/Cu–TCNQ. The fabricated TONT/r-GO/Cu–TCNQ photoanode film was systematically characterized by various techniques, namely, X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy, field emission-scanning electron microscopy, field emission-transmission electron microscopy, and X-ray photoelectron spectroscopy. Photoelectrochemical water oxidation was evaluated in 1 M NaOH as an electrolyte, and the TONT/r-GO/Cu–TCNQ photoanode film exhibited a considerably improved JSC (photocurrent density) value of 0.72 mA/cm2 at 1.23 V versus VRHE (reversible hydrogen electrode) compared to the JSC value (0.30 mA/cm2) of bare TONTs. The obtained experimental results demonstrated that r-GO with a high work function and higher electron mobility accepts photogenerated electrons from the conduction band of TONTs and leads to suppressed charge recombination and favorable charge separation/transfer events, whereas Cu–TCNQ acts as an oxygen evolution reaction co-catalyst, which accepts photogenerated holes from the valence band of TONTs, accelerating the surface water oxidation reaction. Additionally, photoluminescence spectroscopy, incident photon-to-current efficiency, Mott–Schottky plot, and electrochemical impedance spectroscopy confirmed that the r-GO and Cu–TCNQ complexes boost the charge separation/transfer events." @default.
• W3216961467 created "2021-12-06" @default.
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• W3216961467 date "2021-12-01" @default.
• W3216961467 modified "2023-10-15" @default.
• W3216961467 title "TiO₂ Nanotube Arrays Decorated with Reduced Graphene Oxide and Cu–Tetracyanoquinodimethane as Anode Materials for Photoelectrochemical Water Oxidation" @default.
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• W3216961467 doi "https://doi.org/10.1021/acsanm.1c02757" @default.
• W3216961467 hasPublicationYear "2021" @default.
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