Volume 16, Issue 8 e202202322
Research Article

Tungsten Disulfide-Interfacing Nickel-Porphyrin For Photo-Enhanced Electrocatalytic Water Oxidation

Michail P. Minadakis

Michail P. Minadakis

Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece

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Dr. Ruben Canton-Vitoria

Dr. Ruben Canton-Vitoria

Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece

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Dr. Christina Stangel

Dr. Christina Stangel

Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece

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Dr. Emmanuel Klontzas

Dr. Emmanuel Klontzas

Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece

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Dr. Raul Arenal

Dr. Raul Arenal

Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, Mariano Esquillor s/n, 50018 Zaragoza, Spain

Instituto de Nanociencia y Materiales de Aragon (INMA), CSIC-U. de Zaragoza, Calle Pedro Cerbuna 12, 50009 Zaragoza, Spain

ARAID Foundation, 50018 Zaragoza, Spain

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Dr. Javier Hernández-Ferrer

Dr. Javier Hernández-Ferrer

Instituto de Carboquímica (ICB-CSIC), C/Miguel Luesma Castán 4, 50018 Zaragoza, Spain

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Dr. Ana M. Benito

Dr. Ana M. Benito

Instituto de Carboquímica (ICB-CSIC), C/Miguel Luesma Castán 4, 50018 Zaragoza, Spain

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Prof. Dr. Wolfgang K. Maser

Prof. Dr. Wolfgang K. Maser

Instituto de Carboquímica (ICB-CSIC), C/Miguel Luesma Castán 4, 50018 Zaragoza, Spain

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Dr. Nikos Tagmatarchis

Corresponding Author

Dr. Nikos Tagmatarchis

Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece

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First published: 11 January 2023
Citations: 3

Graphical Abstract

Tungsten disulfide is covalently linked with photo- and electroactive nickel-porphyrin (NiP), yielding WS2−NiP with remarkable photo-enhanced electrocatalytic activity and stability for the water oxidation reaction. This activity is attributed to Ni centers coordinated and stabilized by N4 motifs, such as those of the tetrapyrrole rings in the porphyrin derivative chains.

Abstract

Covalent functionalization of tungsten disulfide (WS2) with photo- and electro-active nickel-porphyrin (NiP) is reported. Exfoliated WS2 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, WS2−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 WS2−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 WS2−NiP is attributed to the presence of Ni centers coordinated and stabilized by the N4 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.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.