Remarkable Stability of a Molecular Ruthenium Complex in PEM Water Electrolysis

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 Apr 18

PMID 35432912

Authors

Marco Bellini

Jonas Bosken

Michael Worle

Debora Thony

Juan Jose Gamboa-Carballo

Frank Krumeich

Francesco Bartoli

Hamish A Miller

Lorenzo Poggini

Werner Oberhauser

Alessandro Lavacchi

Hansjorg Grutzmacher

Francesco Vizza

Affiliations

Soon will be listed here.

Abstract

The dinuclear Ru diazadiene olefin complex, [Ru(OTf)(μ-H)(Medad)(dbcot)], is an active catalyst for hydrogen evolution in a Polymer Exchange Membrane (PEM) water electrolyser. When supported on high surface area carbon black and at 80 °C, [Ru(OTf)(μ-H)(Medad)(dbcot)]@C evolves hydrogen at the cathode of a PEM electrolysis cell (400 mA cm, 1.9 V). A remarkable turn over frequency (TOF) of 7800 mol mol h is maintained over 7 days of operation. A series of model reactions in homogeneous media and in electrochemical half cells, combined with DFT calculations, are used to rationalize the hydrogen evolution mechanism promoted by [Ru(OTf)(μ-H)(Medad)(dbcot)].

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PMID: 35975144 PMC: 9350615. DOI: 10.1039/d2sc02845j.

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