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A new preparation of bifunctional crystalline heterogeneous copper electrocatalyst by electrodeposition using a robson-type macrocyclic dinuclear copper complex for efficient hydrogen and oxygen evolution from water

Abstract

The development of a low-cost, stable bifunctional electrocatalyst which operate in same electrolyte with low overpotential for water splitting, including oxygen evolution reaction and hydrogen evolution reaction, remains a great challenge and attractive. In this study, a water soluble Robson-type macrocyclic dicopper(II) complex has been used for the first time as a catalyst precursor for the generation of a copper based bifunctional heterogeneous catalyst film, which can be used for both HER and OER at near neutral pH. In sodium borate buffer at pH 9.20, this complex decomposed to give a Cu(OH)2/Cu2O based thin film on FTO that catalyzes both hydrogen production and water oxidation. The morphology, nature and composition of the thin film were fully characterized by scanning electron microscopy, powder X-ray diffraction, X-ray photoelectron and energy dispersive X-ray spectroscopies. The catalyst film showed high stability during the course of electrolysis either in cathodic or anodic directions for more than 4 hr. Faradaic efficiencies of ~92% for HER and ~96% for OER were achieved. The switch between the two half-side of the catalytic water splitting was fully reversible in nature.

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Publication details

The article was received on 01 May 2017, accepted on 30 May 2017 and first published on 31 May 2017


Article type: Paper
DOI: 10.1039/C7DT01594A
Citation: Dalton Trans., 2017, Accepted Manuscript
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    A new preparation of bifunctional crystalline heterogeneous copper electrocatalyst by electrodeposition using a robson-type macrocyclic dinuclear copper complex for efficient hydrogen and oxygen evolution from water

    S. Majumder, A. Abdel Haleem, P. Nagaraju and Y. Naruta, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT01594A

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