Affiliation:
1. Theoretical and Physical Chemistry Institute National Hellenic Research Foundation 48 Vassileos Constantinou Avenue 11635 Athens Greece
2. Laboratorio de Microscopias Avanzadas (LMA) Universidad de Zaragoza Mariano Esquillor s/n 50018 Zaragoza Spain
3. Instituto de Nanociencia y Materiales de Aragon (INMA) CSIC-U. de Zaragoza Calle Pedro Cerbuna 12 50009 Zaragoza Spain
4. ARAID Foundation 50018 Zaragoza Spain
5. Instituto de Carboquímica (ICB-CSIC) C/Miguel Luesma Castán 4 50018 Zaragoza Spain
Abstract
AbstractCovalent 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.
Subject
General Energy,General Materials Science,General Chemical Engineering,Environmental Chemistry
Cited by
4 articles.
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