A Molecular Ni-Complex Containing Tetrahedral Nickel Selenide Core as Highly Efficient Electrocatalyst for Water Oxidation

Abstract

We report the highly efficient catalytic activity of transition metal selenide-based coordination complex, [Ni{(SeP'Pr2)2N}2], (1) for oxygen evolution and hydrogen evolution reactions (OER and HER, respectively) in alkaline solution. Very low overpotentials of 200 mV and 310 mV were required to achieve 10 mA cm-2 for OER and HER, respectively. The overpotential for OER is one of the lowest that has been reported up to now, making this one of the best OER electrocatalysts. In addition, this molecular complex exhibits an exceptionally high mass activity (111.02 A g-1) and much higher TOF value (0.26 s-1) at overpotential of 300 mV. This bifunctional electrocatalyst enables water electrolysis in alkaline solutions at cell voltage of 1.54 V.

Department(s)

Chemistry

Keywords and Phrases

Catalyst activity; Coordination reactions; Electrocatalysis; Hydrogen; Nickel; Selenium compounds; Transition metals; Bifunctional electrocatalysts; Coordination complex; Hydrogen evolution; Hydrogen evolution reactions; Oxygen evolution; Selenides; Tetrahedral nickels; Water splitting; Electrocatalysts

International Standard Serial Number (ISSN)

1864-5631

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2016 Wiley-VCH Verlag, All rights reserved.

Publication Date

01 Nov 2016

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